Insect pest issues in South Dakota
Planting Populations and Seed Treatments
Adam Varenhorst Assistant Professor & Extension Field Crop Entomologist Brady Hauswedell Graduate Student
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© 2015 South Dakota Board of Regents
About me • From Northwest Iowa – Grew up on family’s farm – Early interest in IPM and insects
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© 2015 South Dakota Board of Regents
Seed treatment debate • 2014: EPA determined $0.00 benefit
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© 2015 South Dakota Board of Regents
Seed treatment debate • AgInformatics, LLC re-analyzed the data and found a 2.8%/acre yield benefit
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© 2015 South Dakota Board of Regents
So, which is it? • $0.00 or 2.8% increase (~1.2 bu/acre) – Current prices that’s $11.45/acre – Estimated insecticide seed treatment ~$9
• More importantly, what’s causing it?
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© 2015 South Dakota Board of Regents
Current recommendations • Fields transitioning from pasture, CRP or other grassland • Fields with recently incorporated manure, cover crops or weeds
• Food grade soybean or seed production
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© 2015 South Dakota Board of Regents
Insect pests being managed?
Matt Montgomery
Bean leaf beetle
Soybean aphids
T. Hillyer
White grubs
Seedcorn maggots w w w. i G r o w. o r g ®
Grape colaspis beetle
Frank Peairs
Wireworms
© 2015 South Dakota Board of Regents
Insect pests being managed?
Matt Montgomery
Bean leaf beetle
Grape colaspis beetle
T. Hillyer
White grubs
Seedcorn maggots w w w. i G r o w. o r g ®
Frank Peairs
Wireworms
© 2015 South Dakota Board of Regents
Shortfalls of current recommendations • What about: – Effect of planting date – Effect of plant populations • Other states suggesting 80-120,000k seeds/A
– Regional effects within a state – Anticipated early season pest pressure
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© 2015 South Dakota Board of Regents
So what’s the problem?
• Call for the reduction of insecticide seed treatments in soybean, but current recommendations fall short
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© 2015 South Dakota Board of Regents
What do we need to know?
• What’s responsible for the 2.8% yield increase associated with the use of insecticide seed treatments in soybean?
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© 2015 South Dakota Board of Regents
Study objective • Evaluate the impact of: – Location within Eastern South Dakota – Planting date – Seeding rate
– Seed treatment Philip Rozeboom
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© 2015 South Dakota Board of Regents
Experimental design • Conducted at four SDSU Research Farms – Southeast Farm – Volga Farm – Brookings Farm – Northeast Farm
• Commercial soybean varieties – Maturity varied from 1.3-2.2 based on location
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© 2015 South Dakota Board of Regents
Experimental design • At each location: – Planting Date • Early (May) • Late (June)
– Seven seeding rates • 60k, 80k, 100k, 120k, 140k, 160k, 180k
– Three seed treatments • Untreated control • Fungicide (EverGol Energy SB) • Insecticide + Fungicide (Poncho + EverGol Energy SB) w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
Experimental design • Soil samples – Emergence, 14d and 28d post-emergence
• Stand counts – Collected at 14d post emergence
• Yield – Collected from middle two rows of each plot
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© 2015 South Dakota Board of Regents
So what did we find belowground? • 15,498 organisms identified – Mainly detritivores
• Top pests: – Wireworms - 63 – White grubs - 16
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© 2015 South Dakota Board of Regents
2016 stand counts: Northeast Farm Early
Late
Planting Population
Untreated
Fungicide
Fungicide+ Insecticide
Untreated
Fungicide
Fungicide+ Insecticide
60k
54,740b
61,565a
64,759a
52,998
44,722
55,321
80k
73,907b
81,167a
80,876a
57,209
62,581
56,773
100k
82,474b
94,961a
102,366a
63,162
69,551
72,600
120k
98,300b
109,045ab
115,289a
81,167
77,682
78,263
140k
108,610b
121,097ab
123,420a
86,423
93,364
95,396
160k
117,176b
130,680a
142,441a
99,840
98,446
96,994
180k
125,598b
151,444a
147,959a
108,900
107,738
105,560
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© 2015 South Dakota Board of Regents
2016 stand counts: Volga Farm Early
Late
Planting Population
Untreated
Fungicide
Fungicide+ Insecticide
Untreated
Fungicide
Fungicide+ Insecticide
60k
71,874
65,340
66,792
55,902
57,935
65,485
80k
82,038
88,282
84,361
71,148
76,666
84,071
100k
101,640
104,399
105,706
87,265
94,235
89,153
120k
119,354
117,902
128,066
111,804
114,476
113,111
140k
138,085ab
128,647b
144,764a
116,886
124,291
122,694
160k
148,249b
145,636b
166,544a
126,324c
145,636b
164,076a
180k
170,174
174,821
163,495
142,006b
187,018a
159,720ab
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© 2015 South Dakota Board of Regents
2016 stand counts: Brookings Farm Early
Late
Planting Population
Untreated
Fungicide
Fungicide+ Insecticide
Untreated
Fungicide
Fungicide+ Insecticide
60k
64,643
76,666
79,453
65,630b
75,940ab
78,698a
80k
74,923
89,908
91,912
80,847b
107,593b
82,764b
100k
93,073
116,886
99,462
90,605b
114,998a
98,446b
120k
115,216
93,073
123,362
98,736
116,741
111,165
140k
114,853
139,392
117,612
115,289b
134,862a
99,317c
160k
138,521
151,937
127,921
116,305ab
146,884a
116,596b
180k
133,148
164,003
169,158
130,825b
149,846a
130,970b
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© 2015 South Dakota Board of Regents
2016 Early stand counts: Southeast Early
Late
Planting Population
Untreated
Fungicide
Fungicide+ Insecticide
Untreated
Fungicide
Fungicide+ Insecticide
60k
53,869
49,513
54,305
65,485
70,567
66,066
80k
64,759ab
60,403b
73,181a
71,293
74,633
71,148
100k
81,312
76,811
73,326
80,731
81,602
78,118
120k
95,977a
80,731b
88,717ab
82,764
87,410
84,797
140k
95,687
99,172
93,944
80,296
85,668
84,071
160k
105,270
104,544
116,305
86,684
92,783
87,846
180k
116,886
111,514
128,502
88,572
90,895
93,073
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© 2015 South Dakota Board of Regents
2017 stand counts: Northeast Farm Early
Late
Planting Population
Untreated
Fungicide
Fungicide+ Insecticide
Untreated
Fungicide
Fungicide+ Insecticide
60k
43,908b
53,579ab
61,129a
52,998
44,722
55,321
80k
64,817
71,003
66,937
57,209
62,581
56,773
100k
75,068
71,787
77,537
63,162
69,551
72,600
120k
81,167
91,040
86,830
81,167
77,682
78,263
140k
89,908
97,574
99,172
86,423
93,364
95,396
160k
96,413b
110,642a
106,722ab
99,840
98,446
96,994
180k
100,362b
115,347a
127,718a
108,900
107,738
105,560
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© 2015 South Dakota Board of Regents
2017 stand counts: Volga Farm Early
Late
Planting Population
Untreated
Fungicide
Fungicide+ Insecticide
Untreated
Fungicide
Fungicide+ Insecticide
60k
48,932b
56,483ab
60,258a
50,820
45,302
49,368
80k
65,921
69,406
67,954
58,080
64,614
69,696
100k
77,101
75,068
83,345
75,794
74,778
72,455
120k
85,378
91,331
94,380
81,893
83,635
85,958
140k
99,172
100,188
109,771
87,410
82,909
95,396
160k
116,450
117,902
124,001
100,624
95,542
108,029
180k
124,582
125,598
125,743
107,738
98,300
117,467
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© 2015 South Dakota Board of Regents
2017 stand counts: Brookings Farm Early
Late
Planting Population
Untreated
Fungicide
Fungicide+ Insecticide
Untreated
Fungicide
Fungicide+ Insecticide
60k
52,127
52,998
70,858
62,146
75,940
61,202
80k
61,565b
64,469ab
70,858a
80,586
82,619
80,499
100k
71,148
75,940
70,858
78,989
87,120
99,535
120k
82,909b
84,797ab
70,858a
81,022b
108,203a
92,347ab
140k
92,057
104,254
70,858
83,287
106,809
97,749
160k
104,254
116,596
70,858
127,849
94,380
103,847
180k
117,902
117,757
70,858
103,673
113,692
103,847
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© 2015 South Dakota Board of Regents
2017 stand counts: Southeast Farm Early
Late
Planting Population
Untreated
Fungicide
Fungicide+ Insecticide
Untreated
Fungicide
Fungicide+ Insecticide
60k
38,333b
48,061a
45,651a
54,450
56,192
59,242
80k
46,319b
58,516a
55,031ab
60,839b
67,954ab
70,858a
100k
64,295
56,802
57,209
80,150
83,345
86,394
120k
59,387
64,178
67,228
102,947
107,158
105,996
140k
72,455
75,794
75,068
108,900b
115,724a
116,015a
160k
69,696b
87,410a
88,136a
132,132
126,469
136,924
180k
86,830b
101,930a
102,221a
142,006
143,893
155,654
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© 2015 South Dakota Board of Regents
2016 Yield Year1/ Location2
2016a South Shorec
Volgaa
Brookingsc
Beresfordb
2017b South Shorea
Planting date3/ Seeding Rate (thousands)4
Mayb 60 80 100 120 140 160 180 Maya 60b 80a 100a 120a 140a 160a 180a Maya 60ab 80ab 100a 120a 140a 160a 180a Maya 60 80 100 120 140 160 180 Maya 60d 80c 100b
Yield by treatment (bushels/acre)
Untreated
Fungicide
Fungicide + Insecticide
63.4±2.2 58.0±2.5 55.6±1.4 57.3±3.0 54.6±1.8 50.4±1.9 54.6±3.1
62.8±4.0 57.3±2.6 58.3±2.6 57.6±2.7 53.9±0.9 54.6±2.4 53.1±1.8
59.7±2.0 58.0±1.7 53.5±1.7 55.5±2.6 56.7±2.7 53.7±2.6 54.5±1.8
81.6±1.5 84.5±1.9 83.2±1.3 82.9±2.0 84.4±1.2 84.0±1.4 82.3±1.3
80.1±1.2 82.6±1.2 84.0±1.0 82.7±1.4 81.9±1.8 82.1±1.2 83.2±0.9
79.9±1.0 81.5±1.8 83.9±1.7 83.7±1.5 82.0±1.3 82.2±1.8 84.2±1.6
70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6 73.6±1.1 74.5±1.0
73.9±2.3 69.6±1.9 75.0±2.9 75.4±1.4 73.8±1.5 71.2±1.0 75.5±1.6
70.8±3.6 71.6±2.5 72.7±2.0 68.5±2.8 72.2±1.6 75.1±1.1 73.3±1.7
74.3±1.5 72.9±1.8 69.2±1.3 69.4±2.4 72.7±2.2 73.2±1.3 73.1±1.3
73.7±1.6 73.2±1.2 72.3±0.8 74.8±2.2 73.4±1.3 71.3±1.3 74.6±1.8
76.1±1.4 72.0±1.0 75.6±2.1 71.6±1.3 75.7±1.3 71.7±1.0 73.5±2.1
66.5±1.6 64.6±2.4 71.6±1.6
65.2±1.6 69.6±1.5 72.4±1.8
68.3±0.9 74.6±1.3 73.3±1.2
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Planting date3/ Seeding Rate (thousands)4
Junea 60 80 100 120 140 160 180 Juneb 60b 80b 100a 120ab 140a 160ab 180ab Juneb 60 80 100 120 140 160 180 Juneb 60b 80ab 100a 120ab 140a 160a 180a Juneb 60d 80c 100b
Yield by treatment (bushels/acre)
Untreated
Fungicide
Fungicide + Insecticide
70.4±2.3 67.8±1.3 69.6±1.7 67.9±0.6 70.2±2.3 69.5±0.9 67.4±1.9
69.7±1.6 71.5±1.4 70.1±1.3 71.2±1.1 69.7±1.4 70.5±1.0 70.7±1.8
70.7±1.0 69.6±0.7 68.8±1.3 69.8±2.5 68.7±1.7 69.3±2.0 68.7±2.0
64.9±1.3 67.1±1.0 69.5±0.8 68.8±1.8 67.6±1.1 67.5±1.0 67.2±1.9
64.3±1.8 71.0±1.0 65.3±0.8 68.5±0.9 66.6±0.9 70.2±1.0 68.1±1.2
68.7±1.2 68.0±1.4 66.5±0.5 68.4±0.8 66.6±1.7 67.0±0.8 66.4±0.7
51.2±2.4 54.3±2.1 52.1±1.3 56.7±1.6 58.8±3.3 58.2±2.0 59.1±2.0
48.5±2.3 55.8±1.5 55.9±1.4 57.2±1.1 56.7±2.9 57.4±0.8 61.9±1.6
46.1±1.0 50.1±1.7 51.8±1.2 56.5±0.9 54.8±1.2 58.8±1.0 60.9±1.4
59.5±5.2 60.3±3.0 66.0±2.3 60.2±4.1 68.7±3.2 61.8±3.7 68.2±2.2
62.9±1.6 63.7±3.8 67.0±3.2 64.2±2.5 64.8±3.5 68.5±1.7 66.1±2.7
64.2±1.9 66.5±3.8 68.4±2.4 65.9±1.9 69.0±2.3 71.0±2.3 68.5±2.8
50.4±2.6 51.3±1.2 52.7±1.9 61.7±1.4 59.6±2.3 57.9±1.7 62.5±1.7 63.1±1.2 © 201565.0±1.8 South Dakota Board
of Regents
2016 Yield: Northeast Farm
Year1/ Location2
2016a South Shorec
Volgaa
Brookingsc
Planting date3/ Seeding Rate (thousands)4
Mayb 60 80 100 120 140 160 180 Maya 60b 80a 100a 120a 140a 160a 180a Maya 60ab 80ab 100a 120a 140a
Yield by treatment (bushels/acre)
Untreated
Fungicide
Fungicide + Insecticide
63.4±2.2 58.0±2.5 55.6±1.4 57.3±3.0 54.6±1.8 50.4±1.9 54.6±3.1
62.8±4.0 57.3±2.6 58.3±2.6 57.6±2.7 53.9±0.9 54.6±2.4 53.1±1.8
59.7±2.0 58.0±1.7 53.5±1.7 55.5±2.6 56.7±2.7 53.7±2.6 54.5±1.8
Average:81.6±1.5 56.2 84.5±1.9 83.2±1.3 82.9±2.0 84.4±1.2 84.0±1.4 82.3±1.3 70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6
56.8
80.1±1.2 82.6±1.2 84.0±1.0 82.7±1.4 81.9±1.8 82.1±1.2 83.2±0.9
55.9
79.9±1.0 81.5±1.8 83.9±1.7 83.7±1.5 82.0±1.3 82.2±1.8 84.2±1.6
73.9±2.3 70.8±3.6 69.6±1.9 71.6±2.5 75.0±2.9 72.7±2.0 75.4±1.4 68.5±2.8 w73.8±1.5 w w. i G r o72.2±1.6 w. o r g ®
Planting date3/ Seeding Rate (thousands)4
Junea 60 80 100 120 140 160 180 Juneb 60b 80b 100a 120ab 140a 160ab 180ab Juneb 60 80 100 120 140
Yield by treatment (bushels/acre)
Untreated
Fungicide
Fungicide + Insecticide
70.4±2.3 67.8±1.3 69.6±1.7 67.9±0.6 70.2±2.3 69.5±0.9 67.4±1.9
69.7±1.6 71.5±1.4 70.1±1.3 71.2±1.1 69.7±1.4 70.5±1.0 70.7±1.8
70.7±1.0 69.6±0.7 68.8±1.3 69.8±2.5 68.7±1.7 69.3±2.0 68.7±2.0
Average:64.9±1.3 69.0 67.1±1.0 69.5±0.8 68.8±1.8 67.6±1.1 67.5±1.0 67.2±1.9
70.5
64.3±1.8 71.0±1.0 65.3±0.8 68.5±0.9 66.6±0.9 70.2±1.0 68.1±1.2
69.3
68.7±1.2 68.0±1.4 66.5±0.5 68.4±0.8 66.6±1.7 67.0±0.8 66.4±0.7
51.2±2.4 48.5±2.3 46.1±1.0 54.3±2.1 55.8±1.5 50.1±1.7 52.1±1.3 55.9±1.4 51.8±1.2 56.7±1.6 57.2±1.1 56.5±0.9 ©58.8±3.3 2015 South Dakota Board of Regents 56.7±2.9 54.8±1.2
2016 Yield: Northeast Farm
Year1/ Location2
2016a South Shorec
Volgaa
Brookingsc
Planting date3/ Seeding Rate (thousands)4
Mayb 60 80 100 120 140 160 180 Maya 60b 80a 100a 120a 140a 160a 180a Maya 60ab 80ab 100a 120a 140a
Yield by treatment (bushels/acre)
Untreated
Fungicide
Fungicide + Insecticide
63.4±2.2 58.0±2.5 55.6±1.4 57.3±3.0 54.6±1.8 50.4±1.9 54.6±3.1
62.8±4.0 57.3±2.6 58.3±2.6 57.6±2.7 53.9±0.9 54.6±2.4 53.1±1.8
59.7±2.0 58.0±1.7 53.5±1.7 55.5±2.6 56.7±2.7 53.7±2.6 54.5±1.8
Average:81.6±1.5 56.2 84.5±1.9 83.2±1.3 82.9±2.0 84.4±1.2 84.0±1.4 82.3±1.3 70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6
56.8
80.1±1.2 82.6±1.2 84.0±1.0 82.7±1.4 81.9±1.8 82.1±1.2 83.2±0.9
55.9
79.9±1.0 81.5±1.8 83.9±1.7 83.7±1.5 82.0±1.3 82.2±1.8 84.2±1.6
73.9±2.3 70.8±3.6 69.6±1.9 71.6±2.5 75.0±2.9 72.7±2.0 75.4±1.4 68.5±2.8 w73.8±1.5 w w. i G r o72.2±1.6 w. o r g ®
Planting date3/ Seeding Rate (thousands)4
Junea 60 80 100 120 140 160 180 Juneb 60b 80b 100a 120ab 140a 160ab 180ab Juneb 60 80 100 120 140
Yield by treatment (bushels/acre)
Untreated
Fungicide
Fungicide + Insecticide
70.4±2.3 67.8±1.3 69.6±1.7 67.9±0.6 70.2±2.3 69.5±0.9 67.4±1.9
69.7±1.6 71.5±1.4 70.1±1.3 71.2±1.1 69.7±1.4 70.5±1.0 70.7±1.8
70.7±1.0 69.6±0.7 68.8±1.3 69.8±2.5 68.7±1.7 69.3±2.0 68.7±2.0
Average:64.9±1.3 69.0 67.1±1.0 69.5±0.8 68.8±1.8 67.6±1.1 67.5±1.0 67.2±1.9
70.5
64.3±1.8 71.0±1.0 65.3±0.8 68.5±0.9 66.6±0.9 70.2±1.0 68.1±1.2
69.3
68.7±1.2 68.0±1.4 66.5±0.5 68.4±0.8 66.6±1.7 67.0±0.8 66.4±0.7
51.2±2.4 48.5±2.3 46.1±1.0 54.3±2.1 55.8±1.5 50.1±1.7 52.1±1.3 55.9±1.4 51.8±1.2 56.7±1.6 57.2±1.1 56.5±0.9 ©58.8±3.3 2015 South Dakota Board of Regents 56.7±2.9 54.8±1.2
2016 Yield: Northeast Farm
Year1/ Location2
Planting date3/ Seeding Rate (thousands)4
Yield by treatment (bushels/acre)
Untreated 2016a South Shorec
Volgaa
Brookingsc
Mayb 60 80 100 120 140 160 180 Maya 60b 80a 100a 120a 140a 160a 180a Maya 60ab 80ab 100a 120a 140a
63.4±2.2 58.0±2.5 55.6±1.4 57.3±3.0 54.6±1.8 50.4±1.9 54.6±3.1
Average:81.6±1.5 56.2 84.5±1.9 83.2±1.3 82.9±2.0 84.4±1.2 84.0±1.4 82.3±1.3 70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6
Fungicide
62.8±4.0 57.3±2.6 58.3±2.6 57.6±2.7 53.9±0.9 54.6±2.4 53.1±1.8
56.8
80.1±1.2 82.6±1.2 84.0±1.0 82.7±1.4 81.9±1.8 82.1±1.2 83.2±0.9
Planting date3/ Seeding Rate (thousands)4
Fungicide + Insecticide 59.7±2.0 58.0±1.7 53.5±1.7 55.5±2.6 56.7±2.7 53.7±2.6 54.5±1.8
55.9
79.9±1.0 81.5±1.8 83.9±1.7 83.7±1.5 82.0±1.3 82.2±1.8 84.2±1.6
73.9±2.3 70.8±3.6 69.6±1.9 71.6±2.5 75.0±2.9 72.7±2.0 75.4±1.4 68.5±2.8 ® w73.8±1.5 w w. i G r o72.2±1.6 w. o r g
Junea 60 80 100 120 140 160 180 Juneb 60b 80b 100a 120ab 140a 160ab 180ab Juneb 60 80 100 120 140
Yield by treatment (bushels/acre)
Untreated
Fungicide
Fungicide + Insecticide
70.4±2.3 67.8±1.3 69.6±1.7 67.9±0.6 70.2±2.3 69.5±0.9 67.4±1.9
69.7±1.6 71.5±1.4 70.1±1.3 71.2±1.1 69.7±1.4 70.5±1.0 70.7±1.8
70.7±1.0 69.6±0.7 68.8±1.3 69.8±2.5 68.7±1.7 69.3±2.0 68.7±2.0
Average:64.9±1.3 69.0 67.1±1.0 69.5±0.8 68.8±1.8 67.6±1.1 67.5±1.0 67.2±1.9
70.5
64.3±1.8 71.0±1.0 65.3±0.8 68.5±0.9 66.6±0.9 70.2±1.0 68.1±1.2
69.3
68.7±1.2 68.0±1.4 66.5±0.5 68.4±0.8 66.6±1.7 67.0±0.8 66.4±0.7
51.2±2.4 48.5±2.3 46.1±1.0 54.3±2.1 55.8±1.5 50.1±1.7 52.1±1.3 55.9±1.4 51.8±1.2 56.7±1.6 57.2±1.1 56.5±0.9 ©58.8±3.3 2015 South Dakota Board of Regents 56.7±2.9 54.8±1.2
2016 Yield: Volga Farm Year1/ Location2
Planting date3/ Seeding Rate (thousands)4
Yield by treatment (bushels/acre)
Untreated 2016a South Shorec
Year1/ Location2
2016a Volga a c South Shore
Brookings Volgaa c
Beresfordbc Brookings
Mayb 60 80 100date3/ Planting 120 Rate Seeding 4 140 (thousands) 160 180 Maya b 60 60b 80 80a 100 100a 120 120a 140 140a 160 160a 180 180a Maya 60 60ab b 80 ab 80a 100a 120a 140 140a 160 160a a 180 180a May Mayaa 60 60 ab 80 80 ab 100 100a 120a 120 140a 140
Fungicide
Fungicide + Insecticide
63.4±2.2 62.8±4.0 59.7±2.0 58.0±2.5 57.3±2.6 58.0±1.7 55.6±1.4 58.3±2.6 53.5±1.7 Yield by treatment (bushels/acre) 57.3±3.0 57.6±2.7 55.5±2.6 54.6±1.8 53.9±0.9 56.7±2.7 50.4±1.9 54.6±2.4 53.7±2.6 + Untreated Fungicide Fungicide 54.6±3.1 53.1±1.8 54.5±1.8 Insecticide 81.6±1.5 63.4±2.2 84.5±1.9 58.0±2.5 83.2±1.3 55.6±1.4 82.9±2.0 57.3±3.0 84.4±1.2 54.6±1.8 84.0±1.4 50.4±1.9 82.3±1.3 54.6±3.1
80.1±1.2 62.8±4.0 82.6±1.2 57.3±2.6 84.0±1.0 58.3±2.6 82.7±1.4 57.6±2.7 81.9±1.8 53.9±0.9 82.1±1.2 54.6±2.4 83.2±0.9 53.1±1.8
79.9±1.0 59.7±2.0 81.5±1.8 58.0±1.7 83.9±1.7 53.5±1.7 83.7±1.5 55.5±2.6 82.0±1.3 56.7±2.7 82.2±1.8 53.7±2.6 84.2±1.6 54.5±1.8
Average:70.4±2.5 83.3 81.6±1.5
73.9±2.3 80.1±1.2 69.6±1.9 82.6±1.2 75.0±2.9 84.0±1.0 75.4±1.4 82.7±1.4 73.8±1.5 81.9±1.8 71.2±1.0 82.1±1.2 75.5±1.6 83.2±0.9
82.4
70.8±3.6 79.9±1.0 71.6±2.5 81.5±1.8 72.7±2.0 83.9±1.7 68.5±2.8 83.7±1.5 72.2±1.6 82.0±1.3 75.1±1.1 82.2±1.8 73.3±1.7 84.2±1.6
70.1±1.0 84.5±1.9 73.8±2.2 83.2±1.3 76.2±0.4 82.9±2.0 73.1±1.6 84.4±1.2 73.6±1.1 84.0±1.4 74.5±1.0 82.3±1.3 74.3±1.5 70.4±2.5 72.9±1.8 70.1±1.0 69.2±1.3 73.8±2.2 69.4±2.4 76.2±0.4 72.7±2.2 73.1±1.6
Planting date3/ Seeding Rate (thousands)4
82.5
73.7±1.6 76.1±1.4 73.9±2.3 70.8±3.6 73.2±1.2 72.0±1.0 69.6±1.9 71.6±2.5 72.3±0.8 75.6±2.1 75.0±2.9 72.7±2.0 74.8±2.2 71.6±1.3 75.4±1.4 68.5±2.8 w73.4±1.3 w w. i G r o75.7±1.3 w. o r g ® 73.8±1.5 72.2±1.6
Yield by treatment (bushels/acre)
Untreated Junea 60 80 100date3/ Planting 120 Rate Seeding 4 140 (thousands) 160 180 Juneba 60 60b 80 80b 100 100a 120 ab 120 140 140a 160 ab 160 180 ab 180 Juneb 60b 60 80b 80 100 100a 120 120 ab 140a 140 160 160 ab 180 180 ab June Junebb 60 60b 80 ab 80 100 100a 120 ab 120 140 140a
Fungicide
Fungicide + Insecticide
70.4±2.3 69.7±1.6 70.7±1.0 67.8±1.3 71.5±1.4 69.6±0.7 69.6±1.7 70.1±1.3 68.8±1.3 Yield by treatment (bushels/acre) 67.9±0.6 71.2±1.1 69.8±2.5 70.2±2.3 69.7±1.4 68.7±1.7 69.5±0.9 70.5±1.0 69.3±2.0 + Untreated Fungicide Fungicide 67.4±1.9 70.7±1.8 68.7±2.0 Insecticide 64.9±1.3 70.4±2.3 67.1±1.0 67.8±1.3 69.5±0.8 69.6±1.7 68.8±1.8 67.9±0.6 67.6±1.1 70.2±2.3 67.5±1.0 69.5±0.9 67.2±1.9 67.4±1.9
Average:51.2±2.4 67.5 64.9±1.3 54.3±2.1 67.1±1.0 52.1±1.3 69.5±0.8 56.7±1.6 68.8±1.8 58.8±3.3 67.6±1.1 58.2±2.0 67.5±1.0 59.1±2.0 67.2±1.9
64.3±1.8 69.7±1.6 71.0±1.0 71.5±1.4 65.3±0.8 70.1±1.3 68.5±0.9 71.2±1.1 66.6±0.9 69.7±1.4 70.2±1.0 70.5±1.0 68.1±1.2 70.7±1.8
67.7
48.5±2.3 64.3±1.8 55.8±1.5 71.0±1.0 55.9±1.4 65.3±0.8 57.2±1.1 68.5±0.9 56.7±2.9 66.6±0.9 57.4±0.8 70.2±1.0 61.9±1.6 68.1±1.2
68.7±1.2 70.7±1.0 68.0±1.4 69.6±0.7 66.5±0.5 68.8±1.3 68.4±0.8 69.8±2.5 66.6±1.7 68.7±1.7 67.0±0.8 69.3±2.0 66.4±0.7 68.7±2.0
67.4
46.1±1.0 68.7±1.2 50.1±1.7 68.0±1.4 51.8±1.2 66.5±0.5 56.5±0.9 68.4±0.8 54.8±1.2 66.6±1.7 58.8±1.0 67.0±0.8 60.9±1.4 66.4±0.7
59.5±5.2 62.9±1.6 64.2±1.9 51.2±2.4 48.5±2.3 46.1±1.0 60.3±3.0 63.7±3.8 66.5±3.8 54.3±2.1 55.8±1.5 50.1±1.7 66.0±2.3 67.0±3.2 68.4±2.4 52.1±1.3 55.9±1.4 51.8±1.2 60.2±4.1 64.2±2.5 65.9±1.9 56.7±1.6 57.2±1.1 56.5±0.9 © 2015 South 64.8±3.5 Dakota Board of Regents 68.7±3.2 69.0±2.3 58.8±3.3 56.7±2.9 54.8±1.2
2016 Yield: Volga Farm Year1/ Location2
Planting date3/ Seeding Rate (thousands)4
Yield by treatment (bushels/acre)
Untreated 2016a South Shorec
Year1/ Location2
2016a South Shore Volga a c
Brookings Volgaa c
Beresfordbc Brookings
Mayb 60 80 100 Planting date3/ 120 Rate Seeding 4 140 (thousands) 160 180 Maya b 60b 60 80 80a 100a 100 120 120a 140 140a 160 160a 180 180a Maya 60 60ab b 80 80ab a 100a 120a 140a 160a 180a Maya 60 60 ab 80 80 ab 100a 100 120a 120 140a 140
Fungicide
Fungicide + Insecticide
63.4±2.2 62.8±4.0 59.7±2.0 58.0±2.5 57.3±2.6 58.0±1.7 55.6±1.4 58.3±2.6 53.5±1.7 Yield by treatment (bushels/acre) 57.3±3.0 57.6±2.7 55.5±2.6 54.6±1.8 53.9±0.9 56.7±2.7 50.4±1.9 54.6±2.4 53.7±2.6 + Untreated Fungicide Fungicide Insecticide 54.6±3.1 53.1±1.8 54.5±1.8
63.4±2.2 81.6±1.5 84.5±1.9 58.0±2.5 55.6±1.4 83.2±1.3 82.9±2.0 57.3±3.0 84.4±1.2 54.6±1.8 84.0±1.4 50.4±1.9 82.3±1.3 54.6±3.1
Average:70.4±2.5 83.3 81.6±1.5 70.1±1.0 84.5±1.9 73.8±2.2 83.2±1.3 76.2±0.4 82.9±2.0 73.1±1.6 84.4±1.2 73.6±1.1 84.0±1.4 74.5±1.0 82.3±1.3 74.3±1.5 70.4±2.5 72.9±1.8 70.1±1.0 69.2±1.3 73.8±2.2 69.4±2.4 76.2±0.4 72.7±2.2 73.1±1.6
62.8±4.0 80.1±1.2 82.6±1.2 57.3±2.6 58.3±2.6 84.0±1.0 82.7±1.4 57.6±2.7 81.9±1.8 53.9±0.9 82.1±1.2 54.6±2.4 83.2±0.9 53.1±1.8
82.4
73.9±2.3 80.1±1.2 69.6±1.9 82.6±1.2 75.0±2.9 84.0±1.0 75.4±1.4 82.7±1.4 73.8±1.5 81.9±1.8 71.2±1.0 82.1±1.2 75.5±1.6 83.2±0.9
Planting date3/ Seeding Rate (thousands)4
59.7±2.0 79.9±1.0 81.5±1.8 58.0±1.7 53.5±1.7 83.9±1.7 83.7±1.5 55.5±2.6 82.0±1.3 56.7±2.7 82.2±1.8 53.7±2.6 84.2±1.6 54.5±1.8
82.5
70.8±3.6 79.9±1.0 71.6±2.5 81.5±1.8 72.7±2.0 83.9±1.7 68.5±2.8 83.7±1.5 72.2±1.6 82.0±1.3 75.1±1.1 82.2±1.8 73.3±1.7 84.2±1.6
73.7±1.6 76.1±1.4 73.9±2.3 70.8±3.6 73.2±1.2 72.0±1.0 69.6±1.9 71.6±2.5 72.3±0.8 75.6±2.1 75.0±2.9 72.7±2.0 74.8±2.2 71.6±1.3 75.4±1.4 w w w. i G r o68.5±2.8 w. o r g ® 73.4±1.3 75.7±1.3 73.8±1.5 72.2±1.6
Yield by treatment (bushels/acre)
Untreated Junea 60 80 100 Planting date3/ 120 Rate Seeding 4 140 (thousands) 160 180 Juneba 60b 60 80 80b 100a 100 120 ab 120 140 140a 160 ab 160 180 ab 180 Juneb 60b 60 80b 80 100a 100 120 120 ab 140a 140 160 160 ab 180 180 ab Juneb 60 60b 80 ab 80 100 100a 120 ab 120 140 140a
Fungicide
Fungicide + Insecticide
70.4±2.3 69.7±1.6 70.7±1.0 67.8±1.3 71.5±1.4 69.6±0.7 69.6±1.7 70.1±1.3 68.8±1.3 Yield by treatment (bushels/acre) 67.9±0.6 71.2±1.1 69.8±2.5 70.2±2.3 69.7±1.4 68.7±1.7 69.5±0.9 70.5±1.0 69.3±2.0 + Untreated Fungicide Fungicide Insecticide 67.4±1.9 70.7±1.8 68.7±2.0
70.4±2.3 64.9±1.3 67.1±1.0 67.8±1.3 69.6±1.7 69.5±0.8 68.8±1.8 67.9±0.6 67.6±1.1 70.2±2.3 67.5±1.0 69.5±0.9 67.2±1.9 67.4±1.9
Average:51.2±2.4 67.5 64.9±1.3 54.3±2.1 67.1±1.0 52.1±1.3 69.5±0.8 56.7±1.6 68.8±1.8 58.8±3.3 67.6±1.1 58.2±2.0 67.5±1.0 59.1±2.0 67.2±1.9
69.7±1.6 64.3±1.8 71.0±1.0 71.5±1.4 70.1±1.3 65.3±0.8 68.5±0.9 71.2±1.1 66.6±0.9 69.7±1.4 70.2±1.0 70.5±1.0 68.1±1.2 70.7±1.8
67.7
48.5±2.3 64.3±1.8 55.8±1.5 71.0±1.0 55.9±1.4 65.3±0.8 57.2±1.1 68.5±0.9 56.7±2.9 66.6±0.9 57.4±0.8 70.2±1.0 61.9±1.6 68.1±1.2
70.7±1.0 68.7±1.2 68.0±1.4 69.6±0.7 68.8±1.3 66.5±0.5 68.4±0.8 69.8±2.5 66.6±1.7 68.7±1.7 67.0±0.8 69.3±2.0 66.4±0.7 68.7±2.0
67.4
46.1±1.0 68.7±1.2 50.1±1.7 68.0±1.4 51.8±1.2 66.5±0.5 56.5±0.9 68.4±0.8 54.8±1.2 66.6±1.7 58.8±1.0 67.0±0.8 60.9±1.4 66.4±0.7
59.5±5.2 62.9±1.6 64.2±1.9 51.2±2.4 48.5±2.3 46.1±1.0 60.3±3.0 63.7±3.8 66.5±3.8 54.3±2.1 55.8±1.5 50.1±1.7 66.0±2.3 67.0±3.2 68.4±2.4 52.1±1.3 55.9±1.4 51.8±1.2 60.2±4.1 64.2±2.5 65.9±1.9 56.7±1.6 57.2±1.1 56.5±0.9 © 2015 South Dakota Board of Regents 68.7±3.2 64.8±3.5 69.0±2.3 58.8±3.3 56.7±2.9 54.8±1.2
2016 Yield: Volga Farm Year1/ Location2
Planting date3/ Seeding Rate (thousands)4
Yield by treatment (bushels/acre)
Untreated 2016a South Shorec
Year1/ Location2
2016a Volga a c South Shore
Brookings Volgaa c
Beresfordbc Brookings
Mayb 60 80 100date3/ Planting 120 Rate Seeding 4 140 (thousands) 160 180 Maya b 60 60b 80 80a 100 100a 120 120a 140 140a 160 160a 180 180a Maya 60 60ab b 80 80ab a 100a 120a 140a 160a 180a Maya 60 60 ab 80 80 ab 100 100a 120a 120 140a 140
Fungicide
Fungicide + Insecticide
63.4±2.2 62.8±4.0 59.7±2.0 58.0±2.5 57.3±2.6 58.0±1.7 55.6±1.4 58.3±2.6 53.5±1.7 Yield by treatment (bushels/acre) 57.3±3.0 57.6±2.7 55.5±2.6 54.6±1.8 53.9±0.9 56.7±2.7 50.4±1.9 54.6±2.4 53.7±2.6 + Untreated Fungicide Fungicide 54.6±3.1 53.1±1.8 54.5±1.8 Insecticide 81.6±1.5 63.4±2.2 84.5±1.9 58.0±2.5 83.2±1.3 55.6±1.4 82.9±2.0 57.3±3.0 84.4±1.2 54.6±1.8 84.0±1.4 50.4±1.9 82.3±1.3 54.6±3.1
80.1±1.2 62.8±4.0 82.6±1.2 57.3±2.6 84.0±1.0 58.3±2.6 82.7±1.4 57.6±2.7 81.9±1.8 53.9±0.9 82.1±1.2 54.6±2.4 83.2±0.9 53.1±1.8
79.9±1.0 59.7±2.0 81.5±1.8 58.0±1.7 83.9±1.7 53.5±1.7 83.7±1.5 55.5±2.6 82.0±1.3 56.7±2.7 82.2±1.8 53.7±2.6 84.2±1.6 54.5±1.8
Average:70.4±2.5 83.3 81.6±1.5
73.9±2.3 80.1±1.2 69.6±1.9 82.6±1.2 75.0±2.9 84.0±1.0 75.4±1.4 82.7±1.4 73.8±1.5 81.9±1.8 71.2±1.0 82.1±1.2 75.5±1.6 83.2±0.9
82.4
70.8±3.6 79.9±1.0 71.6±2.5 81.5±1.8 72.7±2.0 83.9±1.7 68.5±2.8 83.7±1.5 72.2±1.6 82.0±1.3 75.1±1.1 82.2±1.8 73.3±1.7 84.2±1.6
70.1±1.0 84.5±1.9 73.8±2.2 83.2±1.3 76.2±0.4 82.9±2.0 73.1±1.6 84.4±1.2 73.6±1.1 84.0±1.4 74.5±1.0 82.3±1.3 74.3±1.5 70.4±2.5 72.9±1.8 70.1±1.0 69.2±1.3 73.8±2.2 69.4±2.4 76.2±0.4 72.7±2.2 73.1±1.6
Planting date3/ Seeding Rate (thousands)4
82.5
73.7±1.6 76.1±1.4 73.9±2.3 70.8±3.6 73.2±1.2 72.0±1.0 69.6±1.9 71.6±2.5 72.3±0.8 75.6±2.1 75.0±2.9 72.7±2.0 74.8±2.2 71.6±1.3 75.4±1.4 68.5±2.8 ® w73.4±1.3 w w. i G r o75.7±1.3 w. o r g 73.8±1.5 72.2±1.6
Yield by treatment (bushels/acre)
Untreated Junea 60 80 100date3/ Planting 120 Rate Seeding 4 140 (thousands) 160 180 Juneba 60 60b 80 80b 100 100a 120 ab 120 140 140a 160 ab 160 180 ab 180 Juneb 60b 60 80b 80 100 100a 120 120 ab 140a 140 160 160 ab 180 180ab Juneb 60 60b 80 ab 80 100 100a 120 ab 120 140 140a
Fungicide
Fungicide + Insecticide
70.4±2.3 69.7±1.6 70.7±1.0 67.8±1.3 71.5±1.4 69.6±0.7 69.6±1.7 70.1±1.3 68.8±1.3 Yield by treatment (bushels/acre) 67.9±0.6 71.2±1.1 69.8±2.5 70.2±2.3 69.7±1.4 68.7±1.7 69.5±0.9 70.5±1.0 69.3±2.0 + Untreated Fungicide Fungicide 67.4±1.9 70.7±1.8 68.7±2.0 Insecticide 64.9±1.3 70.4±2.3 67.1±1.0 67.8±1.3 69.5±0.8 69.6±1.7 68.8±1.8 67.9±0.6 67.6±1.1 70.2±2.3 67.5±1.0 69.5±0.9 67.2±1.9 67.4±1.9
64.3±1.8 69.7±1.6 71.0±1.0 71.5±1.4 65.3±0.8 70.1±1.3 68.5±0.9 71.2±1.1 66.6±0.9 69.7±1.4 70.2±1.0 70.5±1.0 68.1±1.2 70.7±1.8
68.7±1.2 70.7±1.0 68.0±1.4 69.6±0.7 66.5±0.5 68.8±1.3 68.4±0.8 69.8±2.5 66.6±1.7 68.7±1.7 67.0±0.8 69.3±2.0 66.4±0.7 68.7±2.0
Average:51.2±2.4 67.5 64.9±1.3
48.5±2.3 64.3±1.8 55.8±1.5 71.0±1.0 55.9±1.4 65.3±0.8 57.2±1.1 68.5±0.9 56.7±2.9 66.6±0.9 57.4±0.8 70.2±1.0 61.9±1.6 68.1±1.2
67.7
46.1±1.0 68.7±1.2 50.1±1.7 68.0±1.4 51.8±1.2 66.5±0.5 56.5±0.9 68.4±0.8 54.8±1.2 66.6±1.7 58.8±1.0 67.0±0.8 60.9±1.4 66.4±0.7
54.3±2.1 67.1±1.0 52.1±1.3 69.5±0.8 56.7±1.6 68.8±1.8 58.8±3.3 67.6±1.1 58.2±2.0 67.5±1.0 59.1±2.0 67.2±1.9
67.4
59.5±5.2 62.9±1.6 64.2±1.9 51.2±2.4 48.5±2.3 46.1±1.0 60.3±3.0 63.7±3.8 66.5±3.8 54.3±2.1 55.8±1.5 50.1±1.7 66.0±2.3 67.0±3.2 68.4±2.4 52.1±1.3 55.9±1.4 51.8±1.2 60.2±4.1 64.2±2.5 65.9±1.9 56.7±1.6 57.2±1.1 56.5±0.9 © 2015 South 64.8±3.5 Dakota Regents 68.7±3.2 69.0±2.3 58.8±3.3 56.7±2.9Board of 54.8±1.2
(thousands)4
(thousands)4 Untreated
Fungicide
Fungicide + Insecticide
63.4±2.2 58.0±2.5 55.6±1.4 57.3±3.0 54.6±1.8 50.4±1.9 54.6±3.1
62.8±4.0 57.3±2.6 58.3±2.6 57.6±2.7 53.9±0.9 54.6±2.4 53.1±1.8
59.7±2.0 58.0±1.7 53.5±1.7 55.5±2.6 56.7±2.7 53.7±2.6 54.5±1.8
Untreated
Fungicide
Fungicide + Insecticide
70.4±2.3 67.8±1.3 69.6±1.7 67.9±0.6 70.2±2.3 69.5±0.9 67.4±1.9
69.7±1.6 71.5±1.4 70.1±1.3 71.2±1.1 69.7±1.4 70.5±1.0 70.7±1.8
70.7±1.0 69.6±0.7 68.8±1.3 69.8±2.5 68.7±1.7 69.3±2.0 68.7±2.0
2016 Yield: Brookings Farm Farm 2016a South Shorec
Volgaa
Year1/ Location2
2016a Brookings cc South Shore
Beresford Volgaa b
2017b South Shore Brookings ca
Mayb 60 80 100 120 140 160 180 Maya 60b 80a 100 Planting a date3/ 120 a Seeding Rate 4 140a (thousands) 160a 180a Mayab 60 ab 60 80 ab 80 100 100a 120 120a 140 140a 160 160a 180 180a Maya 60b 60 80a 80 100a 100 120a 120 140a 140 160a 160 180a 180 Maya 60ab d 60 80ab c 80 100b a 120 120ab a 140a 160a
81.6±1.5 80.1±1.2 79.9±1.0 84.5±1.9 82.6±1.2 81.5±1.8 83.2±1.3 84.0±1.0 83.9±1.7 Yield by treatment (bushels/acre) 82.9±2.0 82.7±1.4 83.7±1.5 84.4±1.2 81.9±1.8 82.0±1.3 84.0±1.4 82.1±1.2 82.2±1.8 + Untreated Fungicide Fungicide 82.3±1.3 83.2±0.9 84.2±1.6 Insecticide 70.4±2.5 63.4±2.2 70.1±1.0 58.0±2.5 73.8±2.2 55.6±1.4 76.2±0.4 57.3±3.0 73.1±1.6 54.6±1.8 73.6±1.1 50.4±1.9 74.5±1.0 54.6±3.1
73.9±2.3 62.8±4.0 69.6±1.9 57.3±2.6 75.0±2.9 58.3±2.6 75.4±1.4 57.6±2.7 73.8±1.5 53.9±0.9 71.2±1.0 54.6±2.4 75.5±1.6 53.1±1.8
70.8±3.6 59.7±2.0 71.6±2.5 58.0±1.7 72.7±2.0 53.5±1.7 68.5±2.8 55.5±2.6 72.2±1.6 56.7±2.7 75.1±1.1 53.7±2.6 73.3±1.7 54.5±1.8
81.6±1.5 Average:74.3±1.5 73.1
73.7±1.6 80.1±1.2 73.2±1.2 82.6±1.2 72.3±0.8 84.0±1.0 74.8±2.2 82.7±1.4 73.4±1.3 81.9±1.8 71.3±1.3 82.1±1.2 74.6±1.8 83.2±0.9
73.5
76.1±1.4 79.9±1.0 72.0±1.0 81.5±1.8 75.6±2.1 83.9±1.7 71.6±1.3 83.7±1.5 75.7±1.3 82.0±1.3 71.7±1.0 82.2±1.8 73.5±2.1 84.2±1.6
72.9±1.8 84.5±1.9 69.2±1.3 83.2±1.3 69.4±2.4 82.9±2.0 72.7±2.2 84.4±1.2 73.2±1.3 84.0±1.4 73.1±1.3 82.3±1.3 66.5±1.6 70.4±2.5 64.6±2.4 70.1±1.0 71.6±1.6 73.8±2.2 73.7±1.5 76.2±0.4 74.8±1.2 73.1±1.6 76.9±1.2 73.6±1.1
72.0
65.2±1.6 68.3±0.9 73.9±2.3 70.8±3.6 69.6±1.5 74.6±1.3 69.6±1.9 71.6±2.5 72.4±1.8 73.3±1.2 75.0±2.9 72.7±2.0 76.1±1.6 74.7±1.2 75.4±1.4 68.5±2.8 76.9±1.7 75.3±0.7 73.8±1.5 72.2±1.6 w80.0±1.1 w w. i G r o75.4±1.9 w. o r g ® 71.2±1.0 75.1±1.1
Junea 60 80 100 120 140 160 180 Juneb 60b 80b 100 Planting adate3/ 120abRate Seeding 4 140a (thousands) 160ab 180ab June Juneba 60 60 80 80 100 100 120 120 140 140 160 160 180 180 June Junebb 60 60bb 80 80ab b 100 100aa 120 120ab ab 140 140aa 160ab a 160 180ab a 180 June Junebb 60 60d 80 80c 100 100b 120 120b 140 ab 140 160 160a
64.9±1.3 64.3±1.8 68.7±1.2 67.1±1.0 71.0±1.0 68.0±1.4 69.5±0.8 65.3±0.8 66.5±0.5 Yield by treatment (bushels/acre) 68.8±1.8 68.5±0.9 68.4±0.8 67.6±1.1 66.6±0.9 66.6±1.7 67.5±1.0 70.2±1.0 67.0±0.8 + Untreated Fungicide Fungicide 67.2±1.9 68.1±1.2 66.4±0.7 Insecticide 51.2±2.4 70.4±2.3 54.3±2.1 67.8±1.3 52.1±1.3 69.6±1.7 56.7±1.6 67.9±0.6 58.8±3.3 70.2±2.3 58.2±2.0 69.5±0.9 59.1±2.0 67.4±1.9
48.5±2.3 69.7±1.6 55.8±1.5 71.5±1.4 55.9±1.4 70.1±1.3 57.2±1.1 71.2±1.1 56.7±2.9 69.7±1.4 57.4±0.8 70.5±1.0 61.9±1.6 70.7±1.8
46.1±1.0 70.7±1.0 50.1±1.7 69.6±0.7 51.8±1.2 68.8±1.3 56.5±0.9 69.8±2.5 54.8±1.2 68.7±1.7 58.8±1.0 69.3±2.0 60.9±1.4 68.7±2.0
64.9±1.3 Average:59.5±5.2 55.8
62.9±1.6 64.3±1.8 56.2
64.2±1.9 68.7±1.2 66.5±3.8 68.0±1.4 68.4±2.4 66.5±0.5 65.9±1.9 68.4±0.8 69.0±2.3 66.6±1.7 71.0±2.3 67.0±0.8 68.5±2.8 66.4±0.7
60.3±3.0 67.1±1.0 66.0±2.3 69.5±0.8 60.2±4.1 68.8±1.8 68.7±3.2 67.6±1.1 61.8±3.7 67.5±1.0 68.2±2.2 67.2±1.9
63.7±3.8 71.0±1.0 67.0±3.2 65.3±0.8 64.2±2.5 68.5±0.9 64.8±3.5 66.6±0.9 68.5±1.7 70.2±1.0 66.1±2.7 68.1±1.2
54.1
50.4±2.6 51.3±1.2 52.7±1.9 51.2±2.4 48.5±2.3 46.1±1.0 61.7±1.4 59.6±2.3 57.9±1.7 54.3±2.1 55.8±1.5 50.1±1.7 62.5±1.7 65.0±1.8 63.1±1.2 52.1±1.3 55.9±1.4 51.8±1.2 64.0±1.9 67.3±1.9 64.1±0.8 56.7±1.6 57.2±1.1 56.5±0.9 65.4±2.1 67.3±1.4 65.4±1.6 58.8±3.3 56.7±2.9 54.8±1.2 © 2015 South 68.2±1.0 Dakota Board of Regents 69.8±1.2 67.6±1.0 58.2±2.0 57.4±0.8 58.8±1.0
(thousands)4
(thousands)4 Untreated
Fungicide
Fungicide + Insecticide
63.4±2.2 58.0±2.5 55.6±1.4 57.3±3.0 54.6±1.8 50.4±1.9 54.6±3.1
62.8±4.0 57.3±2.6 58.3±2.6 57.6±2.7 53.9±0.9 54.6±2.4 53.1±1.8
59.7±2.0 58.0±1.7 53.5±1.7 55.5±2.6 56.7±2.7 53.7±2.6 54.5±1.8
Untreated
Fungicide
Fungicide + Insecticide
70.4±2.3 67.8±1.3 69.6±1.7 67.9±0.6 70.2±2.3 69.5±0.9 67.4±1.9
69.7±1.6 71.5±1.4 70.1±1.3 71.2±1.1 69.7±1.4 70.5±1.0 70.7±1.8
70.7±1.0 69.6±0.7 68.8±1.3 69.8±2.5 68.7±1.7 69.3±2.0 68.7±2.0
2016 Yield: Brookings Farm Farm 2016a South Shorec
Volgaa
Year1/ Location2
2016a Brookings cc South Shore
Beresford Volgaa b
2017b South Shore Brookings ca
Mayb 60 80 100 120 140 160 180 Maya 60b 80a 100 Planting a date3/ 120 a Seeding Rate 4 140a (thousands) 160a 180a Mayab 60 ab 60 80 ab 80 100 100a 120 120a 140 140a 160 160a 180 180a Maya 60b 60 80a 80 100a 100 120a 120 140a 140 160a 160 180a 180 Maya 60ab d 60 80ab c 80 100b a 120 120ab a 140a 160a
81.6±1.5 80.1±1.2 79.9±1.0 84.5±1.9 82.6±1.2 81.5±1.8 83.2±1.3 84.0±1.0 83.9±1.7 Yield by treatment (bushels/acre) 82.9±2.0 82.7±1.4 83.7±1.5 84.4±1.2 81.9±1.8 82.0±1.3 84.0±1.4 82.1±1.2 82.2±1.8 + Untreated Fungicide Fungicide 82.3±1.3 83.2±0.9 84.2±1.6 Insecticide 70.4±2.5 63.4±2.2 70.1±1.0 58.0±2.5 73.8±2.2 55.6±1.4 76.2±0.4 57.3±3.0 73.1±1.6 54.6±1.8 73.6±1.1 50.4±1.9 74.5±1.0 54.6±3.1
73.9±2.3 62.8±4.0 69.6±1.9 57.3±2.6 75.0±2.9 58.3±2.6 75.4±1.4 57.6±2.7 73.8±1.5 53.9±0.9 71.2±1.0 54.6±2.4 75.5±1.6 53.1±1.8
70.8±3.6 59.7±2.0 71.6±2.5 58.0±1.7 72.7±2.0 53.5±1.7 68.5±2.8 55.5±2.6 72.2±1.6 56.7±2.7 75.1±1.1 53.7±2.6 73.3±1.7 54.5±1.8
81.6±1.5 Average:74.3±1.5 73.1
73.7±1.6 80.1±1.2 73.2±1.2 82.6±1.2 72.3±0.8 84.0±1.0 74.8±2.2 82.7±1.4 73.4±1.3 81.9±1.8 71.3±1.3 82.1±1.2 74.6±1.8 83.2±0.9
73.5
76.1±1.4 79.9±1.0 72.0±1.0 81.5±1.8 75.6±2.1 83.9±1.7 71.6±1.3 83.7±1.5 75.7±1.3 82.0±1.3 71.7±1.0 82.2±1.8 73.5±2.1 84.2±1.6
72.9±1.8 84.5±1.9 69.2±1.3 83.2±1.3 69.4±2.4 82.9±2.0 72.7±2.2 84.4±1.2 73.2±1.3 84.0±1.4 73.1±1.3 82.3±1.3 66.5±1.6 70.4±2.5 64.6±2.4 70.1±1.0 71.6±1.6 73.8±2.2 73.7±1.5 76.2±0.4 74.8±1.2 73.1±1.6 76.9±1.2 73.6±1.1
72.0
65.2±1.6 68.3±0.9 73.9±2.3 70.8±3.6 69.6±1.5 74.6±1.3 69.6±1.9 71.6±2.5 72.4±1.8 73.3±1.2 75.0±2.9 72.7±2.0 76.1±1.6 74.7±1.2 75.4±1.4 68.5±2.8 76.9±1.7 75.3±0.7 73.8±1.5 72.2±1.6 w80.0±1.1 w w. i G r o75.4±1.9 w. o r g ® 71.2±1.0 75.1±1.1
Junea 60 80 100 120 140 160 180 Juneb 60b 80b 100 Planting adate3/ 120abRate Seeding 4 140a (thousands) 160ab 180ab June Juneba 60 60 80 80 100 100 120 120 140 140 160 160 180 180 June Junebb 60 60bb 80 80ab b 100 100aa 120 120ab ab 140 140aa 160ab a 160 180ab a 180 June Junebb 60 60d 80 80c 100 100b 120 120b 140 ab 140 160 160a
64.9±1.3 64.3±1.8 68.7±1.2 67.1±1.0 71.0±1.0 68.0±1.4 69.5±0.8 65.3±0.8 66.5±0.5 Yield by treatment (bushels/acre) 68.8±1.8 68.5±0.9 68.4±0.8 67.6±1.1 66.6±0.9 66.6±1.7 67.5±1.0 70.2±1.0 67.0±0.8 + Untreated Fungicide Fungicide 67.2±1.9 68.1±1.2 66.4±0.7 Insecticide 51.2±2.4 70.4±2.3 54.3±2.1 67.8±1.3 52.1±1.3 69.6±1.7 56.7±1.6 67.9±0.6 58.8±3.3 70.2±2.3 58.2±2.0 69.5±0.9 59.1±2.0 67.4±1.9
48.5±2.3 69.7±1.6 55.8±1.5 71.5±1.4 55.9±1.4 70.1±1.3 57.2±1.1 71.2±1.1 56.7±2.9 69.7±1.4 57.4±0.8 70.5±1.0 61.9±1.6 70.7±1.8
46.1±1.0 70.7±1.0 50.1±1.7 69.6±0.7 51.8±1.2 68.8±1.3 56.5±0.9 69.8±2.5 54.8±1.2 68.7±1.7 58.8±1.0 69.3±2.0 60.9±1.4 68.7±2.0
64.9±1.3 Average:59.5±5.2 55.8
62.9±1.6 64.3±1.8 56.2
64.2±1.9 68.7±1.2 66.5±3.8 68.0±1.4 68.4±2.4 66.5±0.5 65.9±1.9 68.4±0.8 69.0±2.3 66.6±1.7 71.0±2.3 67.0±0.8 68.5±2.8 66.4±0.7
60.3±3.0 67.1±1.0 66.0±2.3 69.5±0.8 60.2±4.1 68.8±1.8 68.7±3.2 67.6±1.1 61.8±3.7 67.5±1.0 68.2±2.2 67.2±1.9
63.7±3.8 71.0±1.0 67.0±3.2 65.3±0.8 64.2±2.5 68.5±0.9 64.8±3.5 66.6±0.9 68.5±1.7 70.2±1.0 66.1±2.7 68.1±1.2
54.1
50.4±2.6 51.3±1.2 52.7±1.9 51.2±2.4 48.5±2.3 46.1±1.0 61.7±1.4 59.6±2.3 57.9±1.7 54.3±2.1 55.8±1.5 50.1±1.7 62.5±1.7 65.0±1.8 63.1±1.2 52.1±1.3 55.9±1.4 51.8±1.2 64.0±1.9 67.3±1.9 64.1±0.8 56.7±1.6 57.2±1.1 56.5±0.9 65.4±2.1 67.3±1.4 65.4±1.6 58.8±3.3 56.7±2.9 54.8±1.2 © 2015 South 68.2±1.0 Dakota Board of Regents 69.8±1.2 67.6±1.0 58.2±2.0 57.4±0.8 58.8±1.0
(thousands)4
(thousands)4 Untreated
Fungicide
Fungicide + Insecticide
63.4±2.2 58.0±2.5 55.6±1.4 57.3±3.0 54.6±1.8 50.4±1.9 54.6±3.1
62.8±4.0 57.3±2.6 58.3±2.6 57.6±2.7 53.9±0.9 54.6±2.4 53.1±1.8
59.7±2.0 58.0±1.7 53.5±1.7 55.5±2.6 56.7±2.7 53.7±2.6 54.5±1.8
Untreated
Fungicide
Fungicide + Insecticide
70.4±2.3 67.8±1.3 69.6±1.7 67.9±0.6 70.2±2.3 69.5±0.9 67.4±1.9
69.7±1.6 71.5±1.4 70.1±1.3 71.2±1.1 69.7±1.4 70.5±1.0 70.7±1.8
70.7±1.0 69.6±0.7 68.8±1.3 69.8±2.5 68.7±1.7 69.3±2.0 68.7±2.0
2016 Yield: Brookings Farm Farm 2016a South Shorec
Volgaa
Year1/ Location2
2016a Brookings cc South Shore
Beresford Volgaa b
2017b South Shore Brookings ca
Mayb 60 80 100 120 140 160 180 Maya 60b 80a 100 Planting a date3/ 120 a Seeding Rate 4 140a (thousands) 160a 180a Mayab 60 ab 60 80 ab 80 100 100a 120 120a 140 140a 160 160a 180 180a Maya 60b 60 80a 80 100a 100 120a 120 140a 140 160a 160 180a 180 Maya 60ab d 60 80ab c 80 100b a 120 120ab a 140a 160a
81.6±1.5 80.1±1.2 79.9±1.0 84.5±1.9 82.6±1.2 81.5±1.8 83.2±1.3 84.0±1.0 83.9±1.7 Yield by treatment (bushels/acre) 82.9±2.0 82.7±1.4 83.7±1.5 84.4±1.2 81.9±1.8 82.0±1.3 84.0±1.4 82.1±1.2 82.2±1.8 + Untreated Fungicide Fungicide 82.3±1.3 83.2±0.9 84.2±1.6 Insecticide 70.4±2.5 63.4±2.2 70.1±1.0 58.0±2.5 73.8±2.2 55.6±1.4 76.2±0.4 57.3±3.0 73.1±1.6 54.6±1.8 73.6±1.1 50.4±1.9 74.5±1.0 54.6±3.1
73.9±2.3 62.8±4.0 69.6±1.9 57.3±2.6 75.0±2.9 58.3±2.6 75.4±1.4 57.6±2.7 73.8±1.5 53.9±0.9 71.2±1.0 54.6±2.4 75.5±1.6 53.1±1.8
70.8±3.6 59.7±2.0 71.6±2.5 58.0±1.7 72.7±2.0 53.5±1.7 68.5±2.8 55.5±2.6 72.2±1.6 56.7±2.7 75.1±1.1 53.7±2.6 73.3±1.7 54.5±1.8
81.6±1.5 Average:74.3±1.5 73.1
73.7±1.6 80.1±1.2 73.2±1.2 82.6±1.2 72.3±0.8 84.0±1.0 74.8±2.2 82.7±1.4 73.4±1.3 81.9±1.8 71.3±1.3 82.1±1.2 74.6±1.8 83.2±0.9
73.5
76.1±1.4 79.9±1.0 72.0±1.0 81.5±1.8 75.6±2.1 83.9±1.7 71.6±1.3 83.7±1.5 75.7±1.3 82.0±1.3 71.7±1.0 82.2±1.8 73.5±2.1 84.2±1.6
72.9±1.8 84.5±1.9 69.2±1.3 83.2±1.3 69.4±2.4 82.9±2.0 72.7±2.2 84.4±1.2 73.2±1.3 84.0±1.4 73.1±1.3 82.3±1.3 66.5±1.6 70.4±2.5 64.6±2.4 70.1±1.0 71.6±1.6 73.8±2.2 73.7±1.5 76.2±0.4 74.8±1.2 73.1±1.6 76.9±1.2 73.6±1.1
72.0
65.2±1.6 68.3±0.9 73.9±2.3 70.8±3.6 69.6±1.5 74.6±1.3 69.6±1.9 71.6±2.5 72.4±1.8 73.3±1.2 75.0±2.9 72.7±2.0 76.1±1.6 74.7±1.2 75.4±1.4 68.5±2.8 76.9±1.7 75.3±0.7 73.8±1.5 72.2±1.6 w80.0±1.1 w w. i G r o75.4±1.9 w. o r g ® 71.2±1.0 75.1±1.1
Junea 60 80 100 120 140 160 180 Juneb 60b 80b 100 Planting adate3/ 120abRate Seeding 4 140a (thousands) 160ab 180ab June Juneba 60 60 80 80 100 100 120 120 140 140 160 160 180 180 June Junebb 60 60bb 80 80ab b 100 100aa 120 120ab ab 140 140aa 160ab a 160 180ab a 180 June Junebb 60 60d 80 80c 100 100b 120 120b 140 ab 140 160 160a
64.9±1.3 64.3±1.8 68.7±1.2 67.1±1.0 71.0±1.0 68.0±1.4 69.5±0.8 65.3±0.8 66.5±0.5 Yield by treatment (bushels/acre) 68.8±1.8 68.5±0.9 68.4±0.8 67.6±1.1 66.6±0.9 66.6±1.7 67.5±1.0 70.2±1.0 67.0±0.8 + Untreated Fungicide Fungicide 67.2±1.9 68.1±1.2 66.4±0.7 Insecticide 51.2±2.4 70.4±2.3 54.3±2.1 67.8±1.3 52.1±1.3 69.6±1.7 56.7±1.6 67.9±0.6 58.8±3.3 70.2±2.3 58.2±2.0 69.5±0.9 59.1±2.0 67.4±1.9
48.5±2.3 69.7±1.6 55.8±1.5 71.5±1.4 55.9±1.4 70.1±1.3 57.2±1.1 71.2±1.1 56.7±2.9 69.7±1.4 57.4±0.8 70.5±1.0 61.9±1.6 70.7±1.8
46.1±1.0 70.7±1.0 50.1±1.7 69.6±0.7 51.8±1.2 68.8±1.3 56.5±0.9 69.8±2.5 54.8±1.2 68.7±1.7 58.8±1.0 69.3±2.0 60.9±1.4 68.7±2.0
64.9±1.3 Average:59.5±5.2 55.8
62.9±1.6 64.3±1.8 56.2
64.2±1.9 68.7±1.2 66.5±3.8 68.0±1.4 68.4±2.4 66.5±0.5 65.9±1.9 68.4±0.8 69.0±2.3 66.6±1.7 71.0±2.3 67.0±0.8 68.5±2.8 66.4±0.7
60.3±3.0 67.1±1.0 66.0±2.3 69.5±0.8 60.2±4.1 68.8±1.8 68.7±3.2 67.6±1.1 61.8±3.7 67.5±1.0 68.2±2.2 67.2±1.9
63.7±3.8 71.0±1.0 67.0±3.2 65.3±0.8 64.2±2.5 68.5±0.9 64.8±3.5 66.6±0.9 68.5±1.7 70.2±1.0 66.1±2.7 68.1±1.2
54.1
50.4±2.6 51.3±1.2 52.7±1.9 51.2±2.4 48.5±2.3 46.1±1.0 61.7±1.4 59.6±2.3 57.9±1.7 54.3±2.1 55.8±1.5 50.1±1.7 62.5±1.7 65.0±1.8 63.1±1.2 52.1±1.3 55.9±1.4 51.8±1.2 64.0±1.9 67.3±1.9 64.1±0.8 56.7±1.6 57.2±1.1 56.5±0.9 65.4±2.1 67.3±1.4 65.4±1.6 58.8±3.3 56.7±2.9 54.8±1.2 © 2015 South 68.2±1.0 Dakota Board of Regents 69.8±1.2 67.6±1.0 58.2±2.0 57.4±0.8 58.8±1.0
140 160 180 Maya 60b 80a 100a 120a 140a 160a 180a Maya 60ab 80ab 100a Planting date3/ Seeding 120aRate 4 (thousands) 140a 160a 180a Mayab 60 80 100 120 140 160 180 Maya b 60d a 80c 100b a 120ab a 120 140a 160a 180a Mayba 60 60ab b 80 80ab a 100ab a 100 120 a 120ab 140a 160a
54.6±1.8 50.4±1.9 54.6±3.1
53.9±0.9 54.6±2.4 53.1±1.8
56.7±2.7 53.7±2.6 54.5±1.8
81.6±1.5 84.5±1.9 83.2±1.3 82.9±2.0 84.4±1.2 84.0±1.4 82.3±1.3
80.1±1.2 82.6±1.2 84.0±1.0 82.7±1.4 81.9±1.8 82.1±1.2 83.2±0.9
79.9±1.0 81.5±1.8 83.9±1.7 83.7±1.5 82.0±1.3 82.2±1.8 84.2±1.6
140 160 180 Juneb 60b 80b 100a 120ab 140a 160ab 180ab Juneb 60 80 100date3/ Planting Seeding 120 Rate 4 (thousands) 140 160 180 Juneba June 60 60 b 80 80ab 100a 100 120 120 ab 140a 140 160a 160 180a 180 Junebb June 60db 60 80cb 80 100 100ba 120 120ab b 140 a 140 ab 160 160ab a 180 180ab a Juneab June 60 60 b 80 80 b 100a 100 120a 120 140a 140 160 160 ab
70.2±2.3 69.5±0.9 67.4±1.9
69.7±1.4 70.5±1.0 70.7±1.8
68.7±1.7 69.3±2.0 68.7±2.0
64.9±1.3 67.1±1.0 69.5±0.8 68.8±1.8 67.6±1.1 67.5±1.0 67.2±1.9
64.3±1.8 71.0±1.0 65.3±0.8 68.5±0.9 66.6±0.9 70.2±1.0 68.1±1.2
68.7±1.2 68.0±1.4 66.5±0.5 68.4±0.8 66.6±1.7 67.0±0.8 66.4±0.7
2016 Yield: Southeast Farm Volgaa
Brookingsc
Year1/ Location2
2016a South Shore Beresford bc
2017b Volga a a South Shore
Brookings Volgac c
70.4±2.5 73.9±2.3 70.8±3.6 70.1±1.0 69.6±1.9 71.6±2.5 73.8±2.2 75.0±2.9 72.7±2.0 Yield by treatment (bushels/acre) 76.2±0.4 75.4±1.4 68.5±2.8 73.1±1.6 73.8±1.5 72.2±1.6 Untreated Fungicide Fungicide 73.6±1.1 71.2±1.0 75.1±1.1 + Insecticide 74.5±1.0 75.5±1.6 73.3±1.7
63.4±2.2 74.3±1.5 58.0±2.5 72.9±1.8 55.6±1.4 69.2±1.3 57.3±3.0 69.4±2.4 54.6±1.8 72.7±2.2 50.4±1.9 73.2±1.3 54.6±3.1 73.1±1.3
62.8±4.0 73.7±1.6 57.3±2.6 73.2±1.2 58.3±2.6 72.3±0.8 57.6±2.7 74.8±2.2 53.9±0.9 73.4±1.3 54.6±2.4 71.3±1.3 53.1±1.8 74.6±1.8
59.7±2.0 76.1±1.4 58.0±1.7 72.0±1.0 53.5±1.7 75.6±2.1 55.5±2.6 71.6±1.3 56.7±2.7 75.7±1.3 53.7±2.6 71.7±1.0 54.5±1.8 73.5±2.1
81.6±1.5 Average:66.5±1.6 72.1 84.5±1.9 64.6±2.4
80.1±1.2 65.2±1.6 82.6±1.2 69.6±1.5 84.0±1.0 72.4±1.8 82.7±1.4 76.1±1.6 81.9±1.8 76.9±1.7 82.1±1.2 80.0±1.1 83.2±0.9 78.5±1.3
79.9±1.0 68.3±0.9 81.5±1.8 74.6±1.3 83.9±1.7 73.3±1.2 83.7±1.5 74.7±1.2 82.0±1.3 75.3±0.7 82.2±1.8 75.4±1.9 84.2±1.6 77.2±1.9
83.2±1.3 71.6±1.6 82.9±2.0 73.7±1.5 84.4±1.2 74.8±1.2 84.0±1.4 76.9±1.2 82.3±1.3 77.6±1.7
73.3
73.7
1.6 bu/acre increase
70.4±2.5 51.8±1.7 70.1±1.0 53.1±1.2 73.8±2.2 53.0±1.1 76.2±0.4 53.1±1.0 73.1±1.6 56.7±2.2 73.6±1.1 58.1±1.3
73.9±2.3 70.8±3.6 52.3±1.6 55.2±1.1 69.6±1.9 71.6±2.5 57.4±3.0 59.1±1.6 75.0±2.9 72.7±2.0 56.9±1.5 55.4±1.6 75.4±1.4 68.5±2.8 54.4±2.0 59.0±1.3 73.8±1.5 72.2±1.6 w56.3±2.0 w w. i G r o57.8±2.8 w. o r g ® 71.2±1.0 75.1±1.1 58.6±1.6 57.3±1.7
51.2±2.4 48.5±2.3 46.1±1.0 54.3±2.1 55.8±1.5 50.1±1.7 52.1±1.3 55.9±1.4(bushels/acre) 51.8±1.2 Yield by treatment 56.7±1.6 57.2±1.1 56.5±0.9 58.8±3.3 56.7±2.9 54.8±1.2 Untreated Fungicide Fungicide 58.2±2.0 57.4±0.8 58.8±1.0 + Insecticide 59.1±2.0 61.9±1.6 60.9±1.4
70.4±2.3 59.5±5.2 67.8±1.3 60.3±3.0 69.6±1.7 66.0±2.3 67.9±0.6 60.2±4.1 70.2±2.3 68.7±3.2 69.5±0.9 61.8±3.7 67.4±1.9 68.2±2.2
69.7±1.6 62.9±1.6 71.5±1.4 63.7±3.8 70.1±1.3 67.0±3.2 71.2±1.1 64.2±2.5 69.7±1.4 64.8±3.5 70.5±1.0 68.5±1.7 70.7±1.8 66.1±2.7
70.7±1.0 64.2±1.9 69.6±0.7 66.5±3.8 68.8±1.3 68.4±2.4 69.8±2.5 65.9±1.9 68.7±1.7 69.0±2.3 69.3±2.0 71.0±2.3 68.7±2.0 68.5±2.8
64.9±1.3 Average:50.4±2.6 63.5 67.1±1.0 61.7±1.4
64.3±1.8 51.3±1.2 71.0±1.0 59.6±2.3 65.3±0.8 65.0±1.8 68.5±0.9 67.3±1.9 66.6±0.9 67.3±1.4 70.2±1.0 68.2±1.0 68.1±1.2 68.8±1.6
68.7±1.2 52.7±1.9 68.0±1.4 57.9±1.7 66.5±0.5 63.1±1.2 68.4±0.8 64.1±0.8 66.6±1.7 65.4±1.6 67.0±0.8 67.6±1.0 66.4±0.7 70.1±1.3
69.5±0.8 62.5±1.7 68.8±1.8 64.0±1.9 67.6±1.1 65.4±2.1 67.5±1.0 69.8±1.2 67.2±1.9 67.7±1.4
65.3
67.6
4.1 bu/acre increase
51.2±2.4 48.5±2.3 46.1±1.0 55.9±2.0 56.4±2.4 56.6±2.3 54.3±2.1 55.8±1.5 50.1±1.7 58.1±0.9 55.1±2.1 59.2±1.4 52.1±1.3 55.9±1.4 51.8±1.2 57.8±2.1 59.6±1.8 61.3±1.1 56.7±1.6 57.2±1.1 56.5±0.9 58.1±1.8 60.8±1.2 61.4±2.2 58.8±3.3 56.7±2.9 54.8±1.2 58.2±1.3 61.8±1.7 © 2015 South 59.1±2.4 Dakota Board of Regents 58.2±2.0 57.4±0.8 58.8±1.0 61.0±2.0 63.7±0.8 63.1±1.8
140 160 180 Maya 60b 80a 100a 120a 140a 160a 180a Maya 60ab 80ab 100a Planting date3/ Seeding 120aRate 4 (thousands) 140a 160a 180a Mayab 60 80 100 120 140 160 180 Maya b 60d a 80c 100b a 120ab a 120 140a 160a 180a Mayba 60 60ab b 80 80ab a 100ab a 100 120 a 120ab 140a 160a
54.6±1.8 50.4±1.9 54.6±3.1
53.9±0.9 54.6±2.4 53.1±1.8
56.7±2.7 53.7±2.6 54.5±1.8
81.6±1.5 84.5±1.9 83.2±1.3 82.9±2.0 84.4±1.2 84.0±1.4 82.3±1.3
80.1±1.2 82.6±1.2 84.0±1.0 82.7±1.4 81.9±1.8 82.1±1.2 83.2±0.9
79.9±1.0 81.5±1.8 83.9±1.7 83.7±1.5 82.0±1.3 82.2±1.8 84.2±1.6
140 160 180 Juneb 60b 80b 100a 120ab 140a 160ab 180ab Juneb 60 80 100date3/ Planting Seeding 120 Rate 4 (thousands) 140 160 180 Juneba June 60 60 b 80 80ab 100a 100 120 120 ab 140a 140 160a 160 180a 180 Junebb June 60db 60 80cb 80 100 100ba 120 120ab b 140 a 140 ab 160 160ab a 180 180ab a Juneab June 60 60 b 80 80 b 100a 100 120a 120 140a 140 160 160 ab
70.2±2.3 69.5±0.9 67.4±1.9
69.7±1.4 70.5±1.0 70.7±1.8
68.7±1.7 69.3±2.0 68.7±2.0
64.9±1.3 67.1±1.0 69.5±0.8 68.8±1.8 67.6±1.1 67.5±1.0 67.2±1.9
64.3±1.8 71.0±1.0 65.3±0.8 68.5±0.9 66.6±0.9 70.2±1.0 68.1±1.2
68.7±1.2 68.0±1.4 66.5±0.5 68.4±0.8 66.6±1.7 67.0±0.8 66.4±0.7
2016 Yield: Southeast Farm Volgaa
Brookingsc
Year1/ Location2
2016a South Shore Beresford bc
2017b Volga a a South Shore
Brookings Volgac c
70.4±2.5 73.9±2.3 70.8±3.6 70.1±1.0 69.6±1.9 71.6±2.5 73.8±2.2 75.0±2.9 72.7±2.0 Yield by treatment (bushels/acre) 76.2±0.4 75.4±1.4 68.5±2.8 73.1±1.6 73.8±1.5 72.2±1.6 Untreated Fungicide Fungicide 73.6±1.1 71.2±1.0 75.1±1.1 + Insecticide 74.5±1.0 75.5±1.6 73.3±1.7
63.4±2.2 74.3±1.5 58.0±2.5 72.9±1.8 55.6±1.4 69.2±1.3 57.3±3.0 69.4±2.4 54.6±1.8 72.7±2.2 50.4±1.9 73.2±1.3 54.6±3.1 73.1±1.3
62.8±4.0 73.7±1.6 57.3±2.6 73.2±1.2 58.3±2.6 72.3±0.8 57.6±2.7 74.8±2.2 53.9±0.9 73.4±1.3 54.6±2.4 71.3±1.3 53.1±1.8 74.6±1.8
59.7±2.0 76.1±1.4 58.0±1.7 72.0±1.0 53.5±1.7 75.6±2.1 55.5±2.6 71.6±1.3 56.7±2.7 75.7±1.3 53.7±2.6 71.7±1.0 54.5±1.8 73.5±2.1
81.6±1.5 Average:66.5±1.6 72.1 84.5±1.9 64.6±2.4
80.1±1.2 65.2±1.6 82.6±1.2 69.6±1.5 84.0±1.0 72.4±1.8 82.7±1.4 76.1±1.6 81.9±1.8 76.9±1.7 82.1±1.2 80.0±1.1 83.2±0.9 78.5±1.3
79.9±1.0 68.3±0.9 81.5±1.8 74.6±1.3 83.9±1.7 73.3±1.2 83.7±1.5 74.7±1.2 82.0±1.3 75.3±0.7 82.2±1.8 75.4±1.9 84.2±1.6 77.2±1.9
83.2±1.3 71.6±1.6 82.9±2.0 73.7±1.5 84.4±1.2 74.8±1.2 84.0±1.4 76.9±1.2 82.3±1.3 77.6±1.7 70.4±2.5 51.8±1.7 70.1±1.0 53.1±1.2 73.8±2.2 53.0±1.1 76.2±0.4 53.1±1.0 73.1±1.6 56.7±2.2 73.6±1.1 58.1±1.3
73.3
73.7
73.9±2.3 70.8±3.6 52.3±1.6 55.2±1.1 69.6±1.9 71.6±2.5 57.4±3.0 59.1±1.6 75.0±2.9 72.7±2.0 56.9±1.5 55.4±1.6 75.4±1.4 68.5±2.8 54.4±2.0 59.0±1.3 73.8±1.5 72.2±1.6 w56.3±2.0 w w. i G r o57.8±2.8 w. o r g ® 71.2±1.0 75.1±1.1 58.6±1.6 57.3±1.7
51.2±2.4 48.5±2.3 46.1±1.0 54.3±2.1 55.8±1.5 50.1±1.7 52.1±1.3 55.9±1.4(bushels/acre) 51.8±1.2 Yield by treatment 56.7±1.6 57.2±1.1 56.5±0.9 58.8±3.3 56.7±2.9 54.8±1.2 Untreated Fungicide Fungicide 58.2±2.0 57.4±0.8 58.8±1.0 + Insecticide 59.1±2.0 61.9±1.6 60.9±1.4
70.4±2.3 59.5±5.2 67.8±1.3 60.3±3.0 69.6±1.7 66.0±2.3 67.9±0.6 60.2±4.1 70.2±2.3 68.7±3.2 69.5±0.9 61.8±3.7 67.4±1.9 68.2±2.2
69.7±1.6 62.9±1.6 71.5±1.4 63.7±3.8 70.1±1.3 67.0±3.2 71.2±1.1 64.2±2.5 69.7±1.4 64.8±3.5 70.5±1.0 68.5±1.7 70.7±1.8 66.1±2.7
70.7±1.0 64.2±1.9 69.6±0.7 66.5±3.8 68.8±1.3 68.4±2.4 69.8±2.5 65.9±1.9 68.7±1.7 69.0±2.3 69.3±2.0 71.0±2.3 68.7±2.0 68.5±2.8
64.9±1.3 Average:50.4±2.6 63.5 67.1±1.0 61.7±1.4
64.3±1.8 51.3±1.2 71.0±1.0 59.6±2.3 65.3±0.8 65.0±1.8 68.5±0.9 67.3±1.9 66.6±0.9 67.3±1.4 70.2±1.0 68.2±1.0 68.1±1.2 68.8±1.6
68.7±1.2 52.7±1.9 68.0±1.4 57.9±1.7 66.5±0.5 63.1±1.2 68.4±0.8 64.1±0.8 66.6±1.7 65.4±1.6 67.0±0.8 67.6±1.0 66.4±0.7 70.1±1.3
69.5±0.8 62.5±1.7 68.8±1.8 64.0±1.9 67.6±1.1 65.4±2.1 67.5±1.0 69.8±1.2 67.2±1.9 67.7±1.4
65.3
67.6
51.2±2.4 48.5±2.3 46.1±1.0 55.9±2.0 56.4±2.4 56.6±2.3 54.3±2.1 55.8±1.5 50.1±1.7 58.1±0.9 55.1±2.1 59.2±1.4 52.1±1.3 55.9±1.4 51.8±1.2 57.8±2.1 59.6±1.8 61.3±1.1 56.7±1.6 57.2±1.1 56.5±0.9 58.1±1.8 60.8±1.2 61.4±2.2 58.8±3.3 56.7±2.9 54.8±1.2 58.2±1.3 61.8±1.7 © 2015 South 59.1±2.4 Dakota Board of Regents 58.2±2.0 57.4±0.8 58.8±1.0 61.0±2.0 63.7±0.8 63.1±1.8
140 160 180 Maya 60b 80a 100a 120a 140a 160a 180a Maya 60ab 80ab 100a Planting date3/ Seeding 120aRate 4 (thousands) 140a 160a 180a Mayab 60 80 100 120 140 160 180 Maya b 60d a 80c 100b a 120ab a 120 140a 160a 180a Mayba 60 60ab b 80 80ab a 100ab a 100 120 a 120ab 140a 160a
54.6±1.8 50.4±1.9 54.6±3.1
53.9±0.9 54.6±2.4 53.1±1.8
56.7±2.7 53.7±2.6 54.5±1.8
81.6±1.5 84.5±1.9 83.2±1.3 82.9±2.0 84.4±1.2 84.0±1.4 82.3±1.3
80.1±1.2 82.6±1.2 84.0±1.0 82.7±1.4 81.9±1.8 82.1±1.2 83.2±0.9
79.9±1.0 81.5±1.8 83.9±1.7 83.7±1.5 82.0±1.3 82.2±1.8 84.2±1.6
140 160 180 Juneb 60b 80b 100a 120ab 140a 160ab 180ab Juneb 60 80 100date3/ Planting Seeding 120 Rate 4 (thousands) 140 160 180 Juneba June 60 60 b 80 80ab 100a 100 120 120 ab 140a 140 160a 160 180a 180 Junebb June 60db 60 80cb 80 100 100ba 120 120ab b 140 a 140 ab 160 160ab a 180 180ab a Juneab June 60 60 b 80 80 b 100a 100 120a 120 140a 140 160 160 ab
70.2±2.3 69.5±0.9 67.4±1.9
69.7±1.4 70.5±1.0 70.7±1.8
68.7±1.7 69.3±2.0 68.7±2.0
64.9±1.3 67.1±1.0 69.5±0.8 68.8±1.8 67.6±1.1 67.5±1.0 67.2±1.9
64.3±1.8 71.0±1.0 65.3±0.8 68.5±0.9 66.6±0.9 70.2±1.0 68.1±1.2
68.7±1.2 68.0±1.4 66.5±0.5 68.4±0.8 66.6±1.7 67.0±0.8 66.4±0.7
2016 Yield: Southeast Farm Volgaa
Brookingsc
Year1/ Location2
2016a South Shore Beresford bc
2017b Volga a a South Shore
Brookings Volgac c
70.4±2.5 73.9±2.3 70.8±3.6 70.1±1.0 69.6±1.9 71.6±2.5 73.8±2.2 75.0±2.9 72.7±2.0 Yield by treatment (bushels/acre) 76.2±0.4 75.4±1.4 68.5±2.8 73.1±1.6 73.8±1.5 72.2±1.6 Untreated Fungicide Fungicide 73.6±1.1 71.2±1.0 75.1±1.1 + Insecticide 74.5±1.0 75.5±1.6 73.3±1.7
63.4±2.2 74.3±1.5 58.0±2.5 72.9±1.8 55.6±1.4 69.2±1.3 57.3±3.0 69.4±2.4 54.6±1.8 72.7±2.2 50.4±1.9 73.2±1.3 54.6±3.1 73.1±1.3
62.8±4.0 73.7±1.6 57.3±2.6 73.2±1.2 58.3±2.6 72.3±0.8 57.6±2.7 74.8±2.2 53.9±0.9 73.4±1.3 54.6±2.4 71.3±1.3 53.1±1.8 74.6±1.8
59.7±2.0 76.1±1.4 58.0±1.7 72.0±1.0 53.5±1.7 75.6±2.1 55.5±2.6 71.6±1.3 56.7±2.7 75.7±1.3 53.7±2.6 71.7±1.0 54.5±1.8 73.5±2.1
81.6±1.5 Average:66.5±1.6 72.1 84.5±1.9 64.6±2.4
80.1±1.2 65.2±1.6 82.6±1.2 69.6±1.5 84.0±1.0 72.4±1.8 82.7±1.4 76.1±1.6 81.9±1.8 76.9±1.7 82.1±1.2 80.0±1.1 83.2±0.9 78.5±1.3
79.9±1.0 68.3±0.9 81.5±1.8 74.6±1.3 83.9±1.7 73.3±1.2 83.7±1.5 74.7±1.2 82.0±1.3 75.3±0.7 82.2±1.8 75.4±1.9 84.2±1.6 77.2±1.9
83.2±1.3 71.6±1.6 82.9±2.0 73.7±1.5 84.4±1.2 74.8±1.2 84.0±1.4 76.9±1.2 82.3±1.3 77.6±1.7 70.4±2.5 51.8±1.7 70.1±1.0 53.1±1.2 73.8±2.2 53.0±1.1 76.2±0.4 53.1±1.0 73.1±1.6 56.7±2.2 73.6±1.1 58.1±1.3
73.3
73.7
73.9±2.3 70.8±3.6 52.3±1.6 55.2±1.1 69.6±1.9 71.6±2.5 57.4±3.0 59.1±1.6 75.0±2.9 72.7±2.0 56.9±1.5 55.4±1.6 75.4±1.4 68.5±2.8 54.4±2.0 59.0±1.3 73.8±1.5 72.2±1.6 w56.3±2.0 w w. i G r o57.8±2.8 w. o r g ® 71.2±1.0 75.1±1.1 58.6±1.6 57.3±1.7
51.2±2.4 48.5±2.3 46.1±1.0 54.3±2.1 55.8±1.5 50.1±1.7 52.1±1.3 55.9±1.4(bushels/acre) 51.8±1.2 Yield by treatment 56.7±1.6 57.2±1.1 56.5±0.9 58.8±3.3 56.7±2.9 54.8±1.2 Untreated Fungicide Fungicide 58.2±2.0 57.4±0.8 58.8±1.0 + Insecticide 59.1±2.0 61.9±1.6 60.9±1.4
70.4±2.3 59.5±5.2 67.8±1.3 60.3±3.0 69.6±1.7 66.0±2.3 67.9±0.6 60.2±4.1 70.2±2.3 68.7±3.2 69.5±0.9 61.8±3.7 67.4±1.9 68.2±2.2
69.7±1.6 62.9±1.6 71.5±1.4 63.7±3.8 70.1±1.3 67.0±3.2 71.2±1.1 64.2±2.5 69.7±1.4 64.8±3.5 70.5±1.0 68.5±1.7 70.7±1.8 66.1±2.7
70.7±1.0 64.2±1.9 69.6±0.7 66.5±3.8 68.8±1.3 68.4±2.4 69.8±2.5 65.9±1.9 68.7±1.7 69.0±2.3 69.3±2.0 71.0±2.3 68.7±2.0 68.5±2.8
64.9±1.3 Average:50.4±2.6 63.5 67.1±1.0 61.7±1.4
64.3±1.8 51.3±1.2 71.0±1.0 59.6±2.3 65.3±0.8 65.0±1.8 68.5±0.9 67.3±1.9 66.6±0.9 67.3±1.4 70.2±1.0 68.2±1.0 68.1±1.2 68.8±1.6
68.7±1.2 52.7±1.9 68.0±1.4 57.9±1.7 66.5±0.5 63.1±1.2 68.4±0.8 64.1±0.8 66.6±1.7 65.4±1.6 67.0±0.8 67.6±1.0 66.4±0.7 70.1±1.3
69.5±0.8 62.5±1.7 68.8±1.8 64.0±1.9 67.6±1.1 65.4±2.1 67.5±1.0 69.8±1.2 67.2±1.9 67.7±1.4
65.3
67.6
51.2±2.4 48.5±2.3 46.1±1.0 55.9±2.0 56.4±2.4 56.6±2.3 54.3±2.1 55.8±1.5 50.1±1.7 58.1±0.9 55.1±2.1 59.2±1.4 52.1±1.3 55.9±1.4 51.8±1.2 57.8±2.1 59.6±1.8 61.3±1.1 56.7±1.6 57.2±1.1 56.5±0.9 58.1±1.8 60.8±1.2 61.4±2.2 58.8±3.3 56.7±2.9 54.8±1.2 58.2±1.3 61.8±1.7 © 2015 South 59.1±2.4 Dakota Board of Regents 58.2±2.0 57.4±0.8 58.8±1.0 61.0±2.0 63.7±0.8 63.1±1.8
100a 120a 140a 160a 180a Maya 60 80 100date3/ Planting 120Rate Seeding 4 140 (thousands) 160 180 May Mayba 60d 60 80c 80 100b 100 120ab 120 140a 140 160a 160 180 180a May Mayab 60bb 60 80 80aa 100 100ab a 120 120ab a 140aa 140 160aa 160 180aa 180 Mayab May 60ab b 60 80ab b 80 100 100ab a 120 120ab a 140 140ab a 160aa 160 180 180ab a Mayaa May 60 60b 80 80a 100 100a 120 120a 140 140a 160 160a 180 180a Maya 60d 80c 100b
2017 Yield Beresfordb
Year1/ Location2
2016 a 2017b South South Shore Shoreca
Volgaac Volga
Brookingscc Brookings
Beresfordbb Beresford
2017b South Shorea
73.8±2.2 76.2±0.4 73.1±1.6 73.6±1.1 74.5±1.0
75.0±2.9 75.4±1.4 73.8±1.5 71.2±1.0 75.5±1.6
72.7±2.0 68.5±2.8 72.2±1.6 75.1±1.1 73.3±1.7
74.3±1.5 73.7±1.6 76.1±1.4 72.9±1.8 73.2±1.2 72.0±1.0 69.2±1.3 72.3±0.8 75.6±2.1 Yield by treatment (bushels/acre) 69.4±2.4 74.8±2.2 71.6±1.3 72.7±2.2 73.4±1.3 75.7±1.3 73.2±1.3 71.3±1.3 71.7±1.0+ Untreated Fungicide Fungicide Insecticide 73.1±1.3 74.6±1.8 73.5±2.1
63.4±2.2 66.5±1.6 58.0±2.5 64.6±2.4 55.6±1.4 71.6±1.6 57.3±3.0 73.7±1.5 54.6±1.8 74.8±1.2 50.4±1.9 76.9±1.2 77.6±1.7 54.6±3.1
62.8±4.0 65.2±1.6 57.3±2.6 69.6±1.5 58.3±2.6 72.4±1.8 57.6±2.7 76.1±1.6 53.9±0.9 76.9±1.7 54.6±2.4 80.0±1.1 78.5±1.3 53.1±1.8
59.7±2.0 68.3±0.9 58.0±1.7 74.6±1.3 53.5±1.7 73.3±1.2 55.5±2.6 74.7±1.2 56.7±2.7 75.3±0.7 53.7±2.6 75.4±1.9 77.2±1.9 54.5±1.8
51.8±1.7 81.6±1.5 84.5±1.9 53.1±1.2 53.0±1.1 83.2±1.3 53.1±1.0 82.9±2.0 56.7±2.2 84.4±1.2 58.1±1.3 84.0±1.4 57.6±1.5 82.3±1.3
52.3±1.6 80.1±1.2 82.6±1.2 57.4±3.0 56.9±1.5 84.0±1.0 54.4±2.0 82.7±1.4 56.3±2.0 81.9±1.8 58.6±1.6 82.1±1.2 54.9±1.9 83.2±0.9
55.2±1.1 79.9±1.0 81.5±1.8 59.1±1.6 55.4±1.6 83.9±1.7 59.0±1.3 83.7±1.5 57.8±2.8 82.0±1.3 57.3±1.7 82.2±1.8 57.6±1.7 84.2±1.6
46.1±3.1 70.4±2.5 51.7±4.4 70.1±1.0 55.0±3.9 73.8±2.2 49.9±3.3 76.2±0.4 61.0±3.4 73.1±1.6 56.9±3.4 73.6±1.1 57.3±3.1 74.5±1.0
49.1±3.5 73.9±2.3 55.5±3.8 69.6±1.9 58.7±3.3 75.0±2.9 59.1±4.4 75.4±1.4 55.4±3.9 73.8±1.5 56.8±4.6 71.2±1.0 64.8±3.0 75.5±1.6
51.8±4.8 70.8±3.6 52.9±2.8 71.6±2.5 50.5±2.8 72.7±2.0 56.2±4.4 68.5±2.8 56.2±5.4 72.2±1.6 66.1±3.0 75.1±1.1 55.9±3.5 73.3±1.7
50.0±3.5 74.3±1.5 62.2±3.1 72.9±1.8 61.8±3.8 69.2±1.3 63.8±3.0 69.4±2.4 64.4±2.1 72.7±2.2 66.5±2.5 73.2±1.3 66.1±3.7 73.1±1.3
55.1±3.1 73.7±1.6 64.2±5.3 73.2±1.2 54.1±10.1 72.3±0.8 66.7±1.4 74.8±2.2 67.1±1.7 73.4±1.3 67.8±2.7 71.3±1.3 69.0±2.5 74.6±1.8
57.1±6.2 76.1±1.4 66.0±2.7 72.0±1.0 69.9±3.0 75.6±2.1 67.4±2.5 71.6±1.3 65.9±3.2 75.7±1.3 70.3±2.0 71.7±1.0 67.8±1.3 73.5±2.1
66.5±1.6 64.6±2.4 71.6±1.6
65.2±1.6 69.6±1.5 72.4±1.8
68.3±0.9 74.6±1.3 73.3±1.2
w w w. i G r o w. o r g
100 120 140 160 180 Juneb 60b 80ab 100date a 3/ Planting 120ab Seeding Rate 140a 4 (thousands) 160a 180a Juneab 60d 60 80c 80 100b 100 120b 120 140 140 ab 160a 160 180 180a Juneba 60b 80b 100a 120ab a 120 140a 160ab 180ab Juneba 60 80 100 120 140 160 180 Juneb 60b 60 80 80 ab 100a 100 120 120 ab 140a 140 160a 160 180a 180 Juneb 60d 80c ® 100b
52.1±1.3 56.7±1.6 58.8±3.3 58.2±2.0 59.1±2.0
55.9±1.4 57.2±1.1 56.7±2.9 57.4±0.8 61.9±1.6
51.8±1.2 56.5±0.9 54.8±1.2 58.8±1.0 60.9±1.4
59.5±5.2 62.9±1.6 64.2±1.9 60.3±3.0 63.7±3.8 66.5±3.8 66.0±2.3 67.0±3.2 68.4±2.4 Yield by treatment (bushels/acre) 60.2±4.1 64.2±2.5 65.9±1.9 68.7±3.2 64.8±3.5 69.0±2.3 61.8±3.7 68.5±1.7 71.0±2.3 + Untreated Fungicide Fungicide Insecticide 68.2±2.2 66.1±2.7 68.5±2.8
70.4±2.3 50.4±2.6 67.8±1.3 61.7±1.4 69.6±1.7 62.5±1.7 67.9±0.6 64.0±1.9 70.2±2.3 65.4±2.1 69.5±0.9 69.8±1.2 67.7±1.4 67.4±1.9
69.7±1.6 51.3±1.2 71.5±1.4 59.6±2.3 70.1±1.3 65.0±1.8 71.2±1.1 67.3±1.9 69.7±1.4 67.3±1.4 70.5±1.0 68.2±1.0 68.8±1.6 70.7±1.8
70.7±1.0 52.7±1.9 69.6±0.7 57.9±1.7 68.8±1.3 63.1±1.2 69.8±2.5 64.1±0.8 68.7±1.7 65.4±1.6 69.3±2.0 67.6±1.0 70.1±1.3 68.7±2.0
55.9±2.0 64.9±1.3 67.1±1.0 58.1±0.9 57.8±2.1 69.5±0.8 58.1±1.8 68.8±1.8 58.2±1.3 67.6±1.1 61.0±2.0 67.5±1.0 63.8±2.6 67.2±1.9
56.4±2.4 64.3±1.8 71.0±1.0 55.1±2.1 59.6±1.8 65.3±0.8 60.8±1.2 68.5±0.9 59.1±2.4 66.6±0.9 63.7±0.8 70.2±1.0 64.4±1.5 68.1±1.2
56.6±2.3 68.7±1.2 68.0±1.4 59.2±1.4 61.3±1.1 66.5±0.5 61.4±2.2 68.4±0.8 61.8±1.7 66.6±1.7 63.1±1.8 67.0±0.8 62.6±1.5 66.4±0.7
62.9±1.2 51.2±2.4 59.9±3.3 54.3±2.1 56.8±3.1 52.1±1.3 64.1±2.1 56.7±1.6 61.0±3.4 58.8±3.3 59.6±3.7 58.2±2.0 60.3±4.5 59.1±2.0
60.4±3.6 48.5±2.3 61.1±4.7 55.8±1.5 65.5±2.0 55.9±1.4 64.8±2.5 57.2±1.1 61.3±3.9 56.7±2.9 65.3±2.1 57.4±0.8 65.5±3.6 61.9±1.6
62.7±4.0 46.1±1.0 59.4±4.0 50.1±1.7 63.9±2.3 51.8±1.2 62.7±1.0 56.5±0.9 64.9±2.2 54.8±1.2 62.9±3.6 58.8±1.0 59.8±4.1 60.9±1.4
58.7±1.4 59.5±5.2 50.5±9.1 60.3±3.0 61.3±1.5 66.0±2.3 56.4±3.9 60.2±4.1 57.1±1.0 68.7±3.2 56.7±0.9 61.8±3.7 59.0±1.3 68.2±2.2
58.1±2.0 62.9±1.6 55.8±2.3 63.7±3.8 58.2±1.5 67.0±3.2 59.0±1.1 64.2±2.5 57.0±1.5 64.8±3.5 56.7±1.6 68.5±1.7 58.6±1.1 66.1±2.7
56.3±1.6 64.2±1.9 59.1±1.3 66.5±3.8 57.1±1.2 68.4±2.4 61.3±1.5 65.9±1.9 60.2±1.5 69.0±2.3 60.1±1.5 71.0±2.3 62.3±0.7 68.5±2.8
50.4±2.6 61.7±1.4 62.5±1.7 ©
51.3±1.2 59.6±2.3 65.0±1.8 2015 South
52.7±1.9 57.9±1.7 63.1±1.2 Dakota Board
of Regents
140a 160a 180a Maya 60ab 80ab 100a 120a 140a 160a 180a Maya 60 80 100 Planting date3/ 120Rate Seeding 4 140 (thousands) 160 180 May Mayba 60d 60 80c 80 100b 100 120ab 120 140a 140 160 160a 180 180a May Mayab 60bb 60 80aa 80 100 100ab a 120 120ab a 140aa 140 160aa 160 180aa 180 Mayab May 60ab b 60 80ab b 80 100 100ab a 120 120ab a 140 140ab a 160 160aa
84.4±1.2 84.0±1.4 82.3±1.3
81.9±1.8 82.1±1.2 83.2±0.9
82.0±1.3 82.2±1.8 84.2±1.6
70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6 73.6±1.1 74.5±1.0
73.9±2.3 69.6±1.9 75.0±2.9 75.4±1.4 73.8±1.5 71.2±1.0 75.5±1.6
70.8±3.6 71.6±2.5 72.7±2.0 68.5±2.8 72.2±1.6 75.1±1.1 73.3±1.7
140a 160ab 180ab Juneb 60 80 100 120 140 160 180 Juneb 60b 80ab 100date a 3/ Planting 120 ab Seeding Rate 140a 4 (thousands) 160a 180a Juneab 60d 60 80c 80 100b 100 120b 120 140 140 ab 160 160a 180 180a Juneba 60b 80b 100a 120ab a 120 140a 160ab 180ab Juneba 60 80 100 120 140 160
67.6±1.1 67.5±1.0 67.2±1.9
66.6±0.9 70.2±1.0 68.1±1.2
66.6±1.7 67.0±0.8 66.4±0.7
51.2±2.4 54.3±2.1 52.1±1.3 56.7±1.6 58.8±3.3 58.2±2.0 59.1±2.0
48.5±2.3 55.8±1.5 55.9±1.4 57.2±1.1 56.7±2.9 57.4±0.8 61.9±1.6
46.1±1.0 50.1±1.7 51.8±1.2 56.5±0.9 54.8±1.2 58.8±1.0 60.9±1.4
2017 Yield: Northeast Farm Brookingsc
Beresfordb
Year1/ Location2
2016 a 2017b South South Shore Shoreca
Volgaac Volga
Brookingscc Brookings
74.3±1.5 73.7±1.6 76.1±1.4 72.9±1.8 73.2±1.2 72.0±1.0 69.2±1.3 72.3±0.8 75.6±2.1 Yield by treatment (bushels/acre) 69.4±2.4 74.8±2.2 71.6±1.3 72.7±2.2 73.4±1.3 75.7±1.3 73.2±1.3 71.3±1.3 71.7±1.0+ Untreated Fungicide Fungicide Insecticide 73.1±1.3 74.6±1.8 73.5±2.1
63.4±2.2 66.5±1.6 58.0±2.5 64.6±2.4 55.6±1.4 71.6±1.6 57.3±3.0 73.7±1.5 54.6±1.8 74.8±1.2 76.9±1.2 50.4±1.9 77.6±1.7 54.6±3.1
Average:81.6±1.5 72.2 51.8±1.7 53.1±1.2 84.5±1.9 53.0±1.1 83.2±1.3 53.1±1.0 82.9±2.0 56.7±2.2 84.4±1.2 58.1±1.3 84.0±1.4 57.6±1.5 82.3±1.3
62.8±4.0 65.2±1.6 57.3±2.6 69.6±1.5 58.3±2.6 72.4±1.8 57.6±2.7 76.1±1.6 53.9±0.9 76.9±1.7 80.0±1.1 54.6±2.4 78.5±1.3 53.1±1.8
63.8
52.3±1.6 80.1±1.2 57.4±3.0 82.6±1.2 56.9±1.5 84.0±1.0 54.4±2.0 82.7±1.4 56.3±2.0 81.9±1.8 58.6±1.6 82.1±1.2 54.9±1.9 83.2±0.9
59.7±2.0 68.3±0.9 58.0±1.7 74.6±1.3 53.5±1.7 73.3±1.2 55.5±2.6 74.7±1.2 56.7±2.7 75.3±0.7 75.4±1.9 53.7±2.6 77.2±1.9 54.5±1.8
74.1
55.2±1.1 79.9±1.0 59.1±1.6 81.5±1.8 55.4±1.6 83.9±1.7 59.0±1.3 83.7±1.5 57.8±2.8 82.0±1.3 57.3±1.7 82.2±1.8 57.6±1.7 84.2±1.6
1.9 bu/acre increase
46.1±3.1 70.4±2.5 51.7±4.4 70.1±1.0 55.0±3.9 73.8±2.2 49.9±3.3 76.2±0.4 61.0±3.4 73.1±1.6 56.9±3.4 73.6±1.1
49.1±3.5 51.8±4.8 73.9±2.3 70.8±3.6 55.5±3.8 52.9±2.8 69.6±1.9 71.6±2.5 58.7±3.3 50.5±2.8 75.0±2.9 72.7±2.0 59.1±4.4 56.2±4.4 75.4±1.4 68.5±2.8 55.4±3.9 56.2±5.4 ® 73.8±1.5 72.2±1.6 w71.2±1.0 w w. i G r o75.1±1.1 w. o r g 56.8±4.6 66.1±3.0
59.5±5.2 62.9±1.6 64.2±1.9 60.3±3.0 63.7±3.8 66.5±3.8 66.0±2.3 67.0±3.2 68.4±2.4 Yield by treatment (bushels/acre) 60.2±4.1 64.2±2.5 65.9±1.9 68.7±3.2 64.8±3.5 69.0±2.3 61.8±3.7 68.5±1.7 71.0±2.3 + Untreated Fungicide Fungicide Insecticide 68.2±2.2 66.1±2.7 68.5±2.8
70.4±2.3 50.4±2.6 67.8±1.3 61.7±1.4 69.6±1.7 62.5±1.7 67.9±0.6 64.0±1.9 70.2±2.3 65.4±2.1 69.8±1.2 69.5±0.9 67.7±1.4 67.4±1.9
Average:64.9±1.3 63.1 55.9±2.0 58.1±0.9 67.1±1.0 57.8±2.1 69.5±0.8 58.1±1.8 68.8±1.8 58.2±1.3 67.6±1.1 61.0±2.0 67.5±1.0 63.8±2.6 67.2±1.9
69.7±1.6 51.3±1.2 71.5±1.4 59.6±2.3 70.1±1.3 65.0±1.8 71.2±1.1 67.3±1.9 69.7±1.4 67.3±1.4 68.2±1.0 70.5±1.0 68.8±1.6 70.7±1.8
63.9
56.4±2.4 64.3±1.8 55.1±2.1 71.0±1.0 59.6±1.8 65.3±0.8 60.8±1.2 68.5±0.9 59.1±2.4 66.6±0.9 63.7±0.8 70.2±1.0 64.4±1.5 68.1±1.2
70.7±1.0 52.7±1.9 69.6±0.7 57.9±1.7 68.8±1.3 63.1±1.2 69.8±2.5 64.1±0.8 68.7±1.7 65.4±1.6 67.6±1.0 69.3±2.0 70.1±1.3 68.7±2.0
63.0
56.6±2.3 68.7±1.2 59.2±1.4 68.0±1.4 61.3±1.1 66.5±0.5 61.4±2.2 68.4±0.8 61.8±1.7 66.6±1.7 63.1±1.8 67.0±0.8 62.6±1.5 66.4±0.7
62.9±1.2 60.4±3.6 62.7±4.0 51.2±2.4 48.5±2.3 46.1±1.0 59.9±3.3 61.1±4.7 59.4±4.0 54.3±2.1 55.8±1.5 50.1±1.7 56.8±3.1 65.5±2.0 63.9±2.3 52.1±1.3 55.9±1.4 51.8±1.2 64.1±2.1 64.8±2.5 62.7±1.0 56.7±1.6 57.2±1.1 56.5±0.9 61.0±3.4 61.3±3.9 64.9±2.2 58.8±3.3 56.7±2.9 54.8±1.2 © 2015 South Dakota Board of Regents 59.6±3.7 65.3±2.1 62.9±3.6 58.2±2.0 57.4±0.8 58.8±1.0
140a 160a 180a Maya 60ab 80ab 100a 120a 140a 160a 180a Maya 60 80 100 Planting date3/ 120Rate Seeding 4 140 (thousands) 160 180 May Mayba 60d 60 80c 80 100b 100 120ab 120 140a 140 160 160a 180 180a May Mayab 60bb 60 80aa 80 100 100ab a 120 120ab a 140aa 140 160aa 160 180aa 180 Mayab May 60ab b 60 80ab b 80 100 100ab a 120 120ab a 140 140ab a 160 160aa
84.4±1.2 84.0±1.4 82.3±1.3
81.9±1.8 82.1±1.2 83.2±0.9
82.0±1.3 82.2±1.8 84.2±1.6
70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6 73.6±1.1 74.5±1.0
73.9±2.3 69.6±1.9 75.0±2.9 75.4±1.4 73.8±1.5 71.2±1.0 75.5±1.6
70.8±3.6 71.6±2.5 72.7±2.0 68.5±2.8 72.2±1.6 75.1±1.1 73.3±1.7
140a 160ab 180ab Juneb 60 80 100 120 140 160 180 Juneb 60b 80ab 100date a 3/ Planting 120 ab Seeding Rate 140a 4 (thousands) 160a 180a Juneab 60d 60 80c 80 100b 100 120b 120 140 140 ab 160 160a 180 180a Juneba 60b 80b 100a 120ab a 120 140a 160ab 180ab Juneba 60 80 100 120 140 160
67.6±1.1 67.5±1.0 67.2±1.9
66.6±0.9 70.2±1.0 68.1±1.2
66.6±1.7 67.0±0.8 66.4±0.7
51.2±2.4 54.3±2.1 52.1±1.3 56.7±1.6 58.8±3.3 58.2±2.0 59.1±2.0
48.5±2.3 55.8±1.5 55.9±1.4 57.2±1.1 56.7±2.9 57.4±0.8 61.9±1.6
46.1±1.0 50.1±1.7 51.8±1.2 56.5±0.9 54.8±1.2 58.8±1.0 60.9±1.4
2017 Yield: Northeast Farm Brookingsc
Beresfordb
Year1/ Location2
2016 a 2017b South South Shore Shoreca
Volgaac Volga
Brookingscc Brookings
74.3±1.5 73.7±1.6 76.1±1.4 72.9±1.8 73.2±1.2 72.0±1.0 69.2±1.3 72.3±0.8 75.6±2.1 Yield by treatment (bushels/acre) 69.4±2.4 74.8±2.2 71.6±1.3 72.7±2.2 73.4±1.3 75.7±1.3 73.2±1.3 71.3±1.3 71.7±1.0+ Untreated Fungicide Fungicide Insecticide 73.1±1.3 74.6±1.8 73.5±2.1
63.4±2.2 66.5±1.6 58.0±2.5 64.6±2.4 55.6±1.4 71.6±1.6 57.3±3.0 73.7±1.5 54.6±1.8 74.8±1.2 76.9±1.2 50.4±1.9 77.6±1.7 54.6±3.1
Average:81.6±1.5 72.2 51.8±1.7 53.1±1.2 84.5±1.9 53.0±1.1 83.2±1.3 53.1±1.0 82.9±2.0 56.7±2.2 84.4±1.2 58.1±1.3 84.0±1.4 57.6±1.5 82.3±1.3 46.1±3.1 70.4±2.5 51.7±4.4 70.1±1.0 55.0±3.9 73.8±2.2 49.9±3.3 76.2±0.4 61.0±3.4 73.1±1.6 56.9±3.4 73.6±1.1
62.8±4.0 65.2±1.6 57.3±2.6 69.6±1.5 58.3±2.6 72.4±1.8 57.6±2.7 76.1±1.6 53.9±0.9 76.9±1.7 80.0±1.1 54.6±2.4 78.5±1.3 53.1±1.8
63.8
52.3±1.6 80.1±1.2 57.4±3.0 82.6±1.2 56.9±1.5 84.0±1.0 54.4±2.0 82.7±1.4 56.3±2.0 81.9±1.8 58.6±1.6 82.1±1.2 54.9±1.9 83.2±0.9
59.7±2.0 68.3±0.9 58.0±1.7 74.6±1.3 53.5±1.7 73.3±1.2 55.5±2.6 74.7±1.2 56.7±2.7 75.3±0.7 75.4±1.9 53.7±2.6 77.2±1.9 54.5±1.8
74.1
55.2±1.1 79.9±1.0 59.1±1.6 81.5±1.8 55.4±1.6 83.9±1.7 59.0±1.3 83.7±1.5 57.8±2.8 82.0±1.3 57.3±1.7 82.2±1.8 57.6±1.7 84.2±1.6
49.1±3.5 51.8±4.8 73.9±2.3 70.8±3.6 55.5±3.8 52.9±2.8 69.6±1.9 71.6±2.5 58.7±3.3 50.5±2.8 75.0±2.9 72.7±2.0 59.1±4.4 56.2±4.4 75.4±1.4 68.5±2.8 55.4±3.9 56.2±5.4 ® 73.8±1.5 72.2±1.6 w71.2±1.0 w w. i G r o75.1±1.1 w. o r g 56.8±4.6 66.1±3.0
59.5±5.2 62.9±1.6 64.2±1.9 60.3±3.0 63.7±3.8 66.5±3.8 66.0±2.3 67.0±3.2 68.4±2.4 Yield by treatment (bushels/acre) 60.2±4.1 64.2±2.5 65.9±1.9 68.7±3.2 64.8±3.5 69.0±2.3 61.8±3.7 68.5±1.7 71.0±2.3 + Untreated Fungicide Fungicide Insecticide 68.2±2.2 66.1±2.7 68.5±2.8
70.4±2.3 50.4±2.6 67.8±1.3 61.7±1.4 69.6±1.7 62.5±1.7 67.9±0.6 64.0±1.9 70.2±2.3 65.4±2.1 69.8±1.2 69.5±0.9 67.7±1.4 67.4±1.9
Average:64.9±1.3 63.1 55.9±2.0 58.1±0.9 67.1±1.0 57.8±2.1 69.5±0.8 58.1±1.8 68.8±1.8 58.2±1.3 67.6±1.1 61.0±2.0 67.5±1.0 63.8±2.6 67.2±1.9
69.7±1.6 51.3±1.2 71.5±1.4 59.6±2.3 70.1±1.3 65.0±1.8 71.2±1.1 67.3±1.9 69.7±1.4 67.3±1.4 68.2±1.0 70.5±1.0 68.8±1.6 70.7±1.8
63.9
56.4±2.4 64.3±1.8 55.1±2.1 71.0±1.0 59.6±1.8 65.3±0.8 60.8±1.2 68.5±0.9 59.1±2.4 66.6±0.9 63.7±0.8 70.2±1.0 64.4±1.5 68.1±1.2
70.7±1.0 52.7±1.9 69.6±0.7 57.9±1.7 68.8±1.3 63.1±1.2 69.8±2.5 64.1±0.8 68.7±1.7 65.4±1.6 67.6±1.0 69.3±2.0 70.1±1.3 68.7±2.0
63.0
56.6±2.3 68.7±1.2 59.2±1.4 68.0±1.4 61.3±1.1 66.5±0.5 61.4±2.2 68.4±0.8 61.8±1.7 66.6±1.7 63.1±1.8 67.0±0.8 62.6±1.5 66.4±0.7
62.9±1.2 60.4±3.6 62.7±4.0 51.2±2.4 48.5±2.3 46.1±1.0 59.9±3.3 61.1±4.7 59.4±4.0 54.3±2.1 55.8±1.5 50.1±1.7 56.8±3.1 65.5±2.0 63.9±2.3 52.1±1.3 55.9±1.4 51.8±1.2 64.1±2.1 64.8±2.5 62.7±1.0 56.7±1.6 57.2±1.1 56.5±0.9 61.0±3.4 61.3±3.9 64.9±2.2 58.8±3.3 56.7±2.9 54.8±1.2 © 2015 South Dakota Board of Regents 59.6±3.7 65.3±2.1 62.9±3.6 58.2±2.0 57.4±0.8 58.8±1.0
140a 160a 180a Maya 60ab 80ab 100a 120a 140a 160a 180a Maya 60 80 100 Planting date3/ 120Rate Seeding 4 140 (thousands) 160 180 May Mayba 60d 60 80c 80 100b 100 120ab 120 140a 140 160 160a 180 180a May Mayab 60bb 60 80aa 80 100 100ab a 120 120ab a 140aa 140 160aa 160 180aa 180 Mayab May 60ab b 60 80ab b 80 100 100ab a 120 120ab a 140 140ab a 160 160aa
84.4±1.2 84.0±1.4 82.3±1.3
81.9±1.8 82.1±1.2 83.2±0.9
82.0±1.3 82.2±1.8 84.2±1.6
70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6 73.6±1.1 74.5±1.0
73.9±2.3 69.6±1.9 75.0±2.9 75.4±1.4 73.8±1.5 71.2±1.0 75.5±1.6
70.8±3.6 71.6±2.5 72.7±2.0 68.5±2.8 72.2±1.6 75.1±1.1 73.3±1.7
140a 160ab 180ab Juneb 60 80 100 120 140 160 180 Juneb 60b 80ab 100date a 3/ Planting 120 ab Seeding Rate 140a 4 (thousands) 160a 180a Juneab 60d 60 80c 80 100b 100 120b 120 140 140 ab 160 160a 180 180a Juneba 60b 80b 100a 120ab a 120 140a 160ab 180ab Juneba 60 80 100 120 140 160
67.6±1.1 67.5±1.0 67.2±1.9
66.6±0.9 70.2±1.0 68.1±1.2
66.6±1.7 67.0±0.8 66.4±0.7
51.2±2.4 54.3±2.1 52.1±1.3 56.7±1.6 58.8±3.3 58.2±2.0 59.1±2.0
48.5±2.3 55.8±1.5 55.9±1.4 57.2±1.1 56.7±2.9 57.4±0.8 61.9±1.6
46.1±1.0 50.1±1.7 51.8±1.2 56.5±0.9 54.8±1.2 58.8±1.0 60.9±1.4
2017 Yield: Northeast Farm Brookingsc
Beresfordb
Year1/ Location2
2016 a 2017b South South Shore Shoreca
Volgaac Volga
Brookingscc Brookings
74.3±1.5 73.7±1.6 76.1±1.4 72.9±1.8 73.2±1.2 72.0±1.0 69.2±1.3 72.3±0.8 75.6±2.1 Yield by treatment (bushels/acre) 69.4±2.4 74.8±2.2 71.6±1.3 72.7±2.2 73.4±1.3 75.7±1.3 73.2±1.3 71.3±1.3 71.7±1.0+ Untreated Fungicide Fungicide Insecticide 73.1±1.3 74.6±1.8 73.5±2.1
63.4±2.2 66.5±1.6 58.0±2.5 64.6±2.4 55.6±1.4 71.6±1.6 57.3±3.0 73.7±1.5 54.6±1.8 74.8±1.2 76.9±1.2 50.4±1.9 77.6±1.7 54.6±3.1
Average:81.6±1.5 72.2 51.8±1.7 53.1±1.2 84.5±1.9 53.0±1.1 83.2±1.3 53.1±1.0 82.9±2.0 56.7±2.2 84.4±1.2 58.1±1.3 84.0±1.4 57.6±1.5 82.3±1.3 46.1±3.1 70.4±2.5 51.7±4.4 70.1±1.0 55.0±3.9 73.8±2.2 49.9±3.3 76.2±0.4 61.0±3.4 73.1±1.6 56.9±3.4 73.6±1.1
62.8±4.0 65.2±1.6 57.3±2.6 69.6±1.5 58.3±2.6 72.4±1.8 57.6±2.7 76.1±1.6 53.9±0.9 76.9±1.7 80.0±1.1 54.6±2.4 78.5±1.3 53.1±1.8
63.8
52.3±1.6 80.1±1.2 57.4±3.0 82.6±1.2 56.9±1.5 84.0±1.0 54.4±2.0 82.7±1.4 56.3±2.0 81.9±1.8 58.6±1.6 82.1±1.2 54.9±1.9 83.2±0.9
59.7±2.0 68.3±0.9 58.0±1.7 74.6±1.3 53.5±1.7 73.3±1.2 55.5±2.6 74.7±1.2 56.7±2.7 75.3±0.7 75.4±1.9 53.7±2.6 77.2±1.9 54.5±1.8
74.1
55.2±1.1 79.9±1.0 59.1±1.6 81.5±1.8 55.4±1.6 83.9±1.7 59.0±1.3 83.7±1.5 57.8±2.8 82.0±1.3 57.3±1.7 82.2±1.8 57.6±1.7 84.2±1.6
49.1±3.5 51.8±4.8 73.9±2.3 70.8±3.6 55.5±3.8 52.9±2.8 69.6±1.9 71.6±2.5 58.7±3.3 50.5±2.8 75.0±2.9 72.7±2.0 59.1±4.4 56.2±4.4 75.4±1.4 68.5±2.8 55.4±3.9 56.2±5.4 ® 73.8±1.5 72.2±1.6 w71.2±1.0 w w. i G r o75.1±1.1 w. o r g 56.8±4.6 66.1±3.0
59.5±5.2 62.9±1.6 64.2±1.9 60.3±3.0 63.7±3.8 66.5±3.8 66.0±2.3 67.0±3.2 68.4±2.4 Yield by treatment (bushels/acre) 60.2±4.1 64.2±2.5 65.9±1.9 68.7±3.2 64.8±3.5 69.0±2.3 61.8±3.7 68.5±1.7 71.0±2.3 + Untreated Fungicide Fungicide Insecticide 68.2±2.2 66.1±2.7 68.5±2.8
70.4±2.3 50.4±2.6 67.8±1.3 61.7±1.4 69.6±1.7 62.5±1.7 67.9±0.6 64.0±1.9 70.2±2.3 65.4±2.1 69.8±1.2 69.5±0.9 67.7±1.4 67.4±1.9
Average:64.9±1.3 63.1 55.9±2.0 58.1±0.9 67.1±1.0 57.8±2.1 69.5±0.8 58.1±1.8 68.8±1.8 58.2±1.3 67.6±1.1 61.0±2.0 67.5±1.0 63.8±2.6 67.2±1.9
69.7±1.6 51.3±1.2 71.5±1.4 59.6±2.3 70.1±1.3 65.0±1.8 71.2±1.1 67.3±1.9 69.7±1.4 67.3±1.4 68.2±1.0 70.5±1.0 68.8±1.6 70.7±1.8
63.9
56.4±2.4 64.3±1.8 55.1±2.1 71.0±1.0 59.6±1.8 65.3±0.8 60.8±1.2 68.5±0.9 59.1±2.4 66.6±0.9 63.7±0.8 70.2±1.0 64.4±1.5 68.1±1.2
70.7±1.0 52.7±1.9 69.6±0.7 57.9±1.7 68.8±1.3 63.1±1.2 69.8±2.5 64.1±0.8 68.7±1.7 65.4±1.6 67.6±1.0 69.3±2.0 70.1±1.3 68.7±2.0
63.0
56.6±2.3 68.7±1.2 59.2±1.4 68.0±1.4 61.3±1.1 66.5±0.5 61.4±2.2 68.4±0.8 61.8±1.7 66.6±1.7 63.1±1.8 67.0±0.8 62.6±1.5 66.4±0.7
62.9±1.2 60.4±3.6 62.7±4.0 51.2±2.4 48.5±2.3 46.1±1.0 59.9±3.3 61.1±4.7 59.4±4.0 54.3±2.1 55.8±1.5 50.1±1.7 56.8±3.1 65.5±2.0 63.9±2.3 52.1±1.3 55.9±1.4 51.8±1.2 64.1±2.1 64.8±2.5 62.7±1.0 56.7±1.6 57.2±1.1 56.5±0.9 61.0±3.4 61.3±3.9 64.9±2.2 58.8±3.3 56.7±2.9 54.8±1.2 © 2015 South Dakota Board of Regents 59.6±3.7 65.3±2.1 62.9±3.6 58.2±2.0 57.4±0.8 58.8±1.0
160a 180a Maya 60 80 100 120 140 160 180 Maya 60d 80c 100date b 3/ Planting 120 ab Seeding Rate 140a 4 (thousands) 160a 180a Maybb May 60 60b 80 80a 100 100ab 120 120ab 140 140a 160 160a 180 180a Mayab May 60bb 60 80ab 80 100 100ab a 120 120ab a 140 140ab a 160 160aa 180 180ab a Mayaa May 60ab b 60 80 a 80ab 100 100aa 120aa 120 140aa 140 160aa 160 180a
73.6±1.1 74.5±1.0
71.2±1.0 75.5±1.6
75.1±1.1 73.3±1.7
74.3±1.5 72.9±1.8 69.2±1.3 69.4±2.4 72.7±2.2 73.2±1.3 73.1±1.3
73.7±1.6 73.2±1.2 72.3±0.8 74.8±2.2 73.4±1.3 71.3±1.3 74.6±1.8
76.1±1.4 72.0±1.0 75.6±2.1 71.6±1.3 75.7±1.3 71.7±1.0 73.5±2.1
160 180 Juneb 60b 80ab 100a 120ab 140a 160a 180a Juneb 60d 80c 100date b 3/ Planting 120 Seeding bRate 140ab 4 (thousands) 160a 180a Juneaa June 60 60b 80 80b 100 100a 120 120a 140 140a 160 ab 160 180 ab 180 Juneba June 60b 60 80b 80 100 100a 120 120 ab 140a 140 160 160 ab 180 180 ab Junebb June 60 60 80 80 100 100 120 120 140 140 160 160 180
2017 Yield: Volga Farm Beresfordb
2017b South Shorea
Year1/ Location2
2016a Volga c c South Shore
Brookings Volgaa c
Beresfordcb Brookings
66.5±1.6 65.2±1.6 68.3±0.9 64.6±2.4 69.6±1.5 74.6±1.3 71.6±1.6 72.4±1.8 73.3±1.2 Yield by treatment (bushels/acre) 73.7±1.5 76.1±1.6 74.7±1.2 74.8±1.2 76.9±1.7 75.3±0.7 76.9±1.2 80.0±1.1 75.4±1.9+ Untreated Fungicide Fungicide 77.6±1.7 78.5±1.3 77.2±1.9 Insecticide 51.8±1.7 63.4±2.2 53.1±1.2 58.0±2.5 53.0±1.1 55.6±1.4 53.1±1.0 57.3±3.0 56.7±2.2 54.6±1.8 58.1±1.3 50.4±1.9 57.6±1.5 54.6±3.1
52.3±1.6 62.8±4.0 57.4±3.0 57.3±2.6 56.9±1.5 58.3±2.6 54.4±2.0 57.6±2.7 56.3±2.0 53.9±0.9 58.6±1.6 54.6±2.4 54.9±1.9 53.1±1.8
55.2±1.1 59.7±2.0 59.1±1.6 58.0±1.7 55.4±1.6 53.5±1.7 59.0±1.3 55.5±2.6 57.8±2.8 56.7±2.7 57.3±1.7 53.7±2.6 57.6±1.7 54.5±1.8
46.1±3.1 Average:81.6±1.5 54.8
49.1±3.5 80.1±1.2 55.5±3.8 82.6±1.2 58.7±3.3 84.0±1.0 59.1±4.4 82.7±1.4 55.4±3.9 81.9±1.8 56.8±4.6 82.1±1.2 64.8±3.0 83.2±0.9
55.8
51.8±4.8 79.9±1.0 52.9±2.8 81.5±1.8 50.5±2.8 83.9±1.7 56.2±4.4 83.7±1.5 56.2±5.4 82.0±1.3 66.1±3.0 82.2±1.8 55.9±3.5 84.2±1.6
51.7±4.4 84.5±1.9 55.0±3.9 83.2±1.3 49.9±3.3 82.9±2.0 61.0±3.4 84.4±1.2 56.9±3.4 84.0±1.4 57.3±3.1 82.3±1.3
57.3
2.5 bu/acre increase
50.0±3.5 70.4±2.5 62.2±3.1 70.1±1.0 61.8±3.8 73.8±2.2 63.8±3.0 76.2±0.4 64.4±2.1 73.1±1.6 66.5±2.5 73.6±1.1 66.1±3.7
55.1±3.1 57.1±6.2 73.9±2.3 70.8±3.6 64.2±5.3 66.0±2.7 69.6±1.9 71.6±2.5 54.1±10.1 69.9±3.0 75.0±2.9 72.7±2.0 66.7±1.4 67.4±2.5 75.4±1.4 68.5±2.8 67.1±1.7 65.9±3.2 73.8±1.5 72.2±1.6 67.8±2.7 70.3±2.0 w71.2±1.0 w w. i G r o75.1±1.1 w. o r g ® 69.0±2.5 67.8±1.3
58.2±2.0 59.1±2.0
57.4±0.8 61.9±1.6
58.8±1.0 60.9±1.4
59.5±5.2 60.3±3.0 66.0±2.3 60.2±4.1 68.7±3.2 61.8±3.7 68.2±2.2
62.9±1.6 63.7±3.8 67.0±3.2 64.2±2.5 64.8±3.5 68.5±1.7 66.1±2.7
64.2±1.9 66.5±3.8 68.4±2.4 65.9±1.9 69.0±2.3 71.0±2.3 68.5±2.8
50.4±2.6 51.3±1.2 52.7±1.9 61.7±1.4 59.6±2.3 57.9±1.7 62.5±1.7 65.0±1.8 63.1±1.2 Yield by treatment (bushels/acre) 64.0±1.9 67.3±1.9 64.1±0.8 65.4±2.1 67.3±1.4 65.4±1.6 69.8±1.2 68.2±1.0 67.6±1.0 + Untreated Fungicide Fungicide 67.7±1.4 68.8±1.6 70.1±1.3 Insecticide 55.9±2.0 70.4±2.3 58.1±0.9 67.8±1.3 57.8±2.1 69.6±1.7 58.1±1.8 67.9±0.6 58.2±1.3 70.2±2.3 61.0±2.0 69.5±0.9 63.8±2.6 67.4±1.9
56.4±2.4 69.7±1.6 55.1±2.1 71.5±1.4 59.6±1.8 70.1±1.3 60.8±1.2 71.2±1.1 59.1±2.4 69.7±1.4 63.7±0.8 70.5±1.0 64.4±1.5 70.7±1.8
56.6±2.3 70.7±1.0 59.2±1.4 69.6±0.7 61.3±1.1 68.8±1.3 61.4±2.2 69.8±2.5 61.8±1.7 68.7±1.7 63.1±1.8 69.3±2.0 62.6±1.5 68.7±2.0
62.9±1.2 Average:64.9±1.3 59.0
60.4±3.6 64.3±1.8 61.1±4.7 71.0±1.0 65.5±2.0 65.3±0.8 64.8±2.5 68.5±0.9 61.3±3.9 66.6±0.9 65.3±2.1 70.2±1.0 65.5±3.6 68.1±1.2
59.9
62.7±4.0 68.7±1.2 59.4±4.0 68.0±1.4 63.9±2.3 66.5±0.5 62.7±1.0 68.4±0.8 64.9±2.2 66.6±1.7 62.9±3.6 67.0±0.8 59.8±4.1 66.4±0.7
59.9±3.3 67.1±1.0 56.8±3.1 69.5±0.8 64.1±2.1 68.8±1.8 61.0±3.4 67.6±1.1 59.6±3.7 67.5±1.0 60.3±4.5 67.2±1.9
60.9
1.9 bu/acre increase
58.7±1.4 58.1±2.0 56.3±1.6 51.2±2.4 48.5±2.3 46.1±1.0 50.5±9.1 55.8±2.3 59.1±1.3 54.3±2.1 55.8±1.5 50.1±1.7 61.3±1.5 58.2±1.5 57.1±1.2 52.1±1.3 55.9±1.4 51.8±1.2 56.4±3.9 59.0±1.1 61.3±1.5 56.7±1.6 57.2±1.1 56.5±0.9 57.1±1.0 57.0±1.5 60.2±1.5 58.8±3.3 56.7±2.9 54.8±1.2 56.7±0.9 56.7±1.6 60.1±1.5 58.2±2.0 57.4±0.8Board of 58.8±1.0 © 2015 South Dakota Regents 59.0±1.3 58.6±1.1 62.3±0.7
160a 180a Maya 60 80 100 120 140 160 180 Maya 60d 80c 100date b 3/ Planting 120 ab Seeding Rate 140a 4 (thousands) 160a 180a Maybb May 60 60b 80 80a 100 100ab 120 120ab 140 140a 160 160a 180 180a Mayab May 60bb 60 80ab 80 100 100ab a 120 120ab a 140 140ab a 160 160aa 180 180ab a Mayaa May 60ab b 60 80 a 80ab 100 100aa 120aa 120 140aa 140 160aa 160 180a
73.6±1.1 74.5±1.0
71.2±1.0 75.5±1.6
75.1±1.1 73.3±1.7
74.3±1.5 72.9±1.8 69.2±1.3 69.4±2.4 72.7±2.2 73.2±1.3 73.1±1.3
73.7±1.6 73.2±1.2 72.3±0.8 74.8±2.2 73.4±1.3 71.3±1.3 74.6±1.8
76.1±1.4 72.0±1.0 75.6±2.1 71.6±1.3 75.7±1.3 71.7±1.0 73.5±2.1
160 180 Juneb 60b 80ab 100a 120ab 140a 160a 180a Juneb 60d 80c 100date b 3/ Planting 120 Seeding bRate 140ab 4 (thousands) 160a 180a Juneaa June 60 60b 80 80b 100 100a 120 120a 140 140a 160 ab 160 180 ab 180 Juneba June 60b 60 80b 80 100 100a 120 120 ab 140a 140 160 160 ab 180 180 ab Junebb June 60 60 80 80 100 100 120 120 140 140 160 160 180
2017 Yield: Volga Farm Beresfordb
2017b South Shorea
Year1/ Location2
2016a Volga c c South Shore
Brookings Volgaa c
Beresfordcb Brookings
66.5±1.6 65.2±1.6 68.3±0.9 64.6±2.4 69.6±1.5 74.6±1.3 71.6±1.6 72.4±1.8 73.3±1.2 Yield by treatment (bushels/acre) 73.7±1.5 76.1±1.6 74.7±1.2 74.8±1.2 76.9±1.7 75.3±0.7 76.9±1.2 80.0±1.1 75.4±1.9+ Untreated Fungicide Fungicide 77.6±1.7 78.5±1.3 77.2±1.9 Insecticide 51.8±1.7 63.4±2.2 53.1±1.2 58.0±2.5 53.0±1.1 55.6±1.4 53.1±1.0 57.3±3.0 56.7±2.2 54.6±1.8 58.1±1.3 50.4±1.9 57.6±1.5 54.6±3.1
52.3±1.6 62.8±4.0 57.4±3.0 57.3±2.6 56.9±1.5 58.3±2.6 54.4±2.0 57.6±2.7 56.3±2.0 53.9±0.9 58.6±1.6 54.6±2.4 54.9±1.9 53.1±1.8
55.2±1.1 59.7±2.0 59.1±1.6 58.0±1.7 55.4±1.6 53.5±1.7 59.0±1.3 55.5±2.6 57.8±2.8 56.7±2.7 57.3±1.7 53.7±2.6 57.6±1.7 54.5±1.8
46.1±3.1 Average:81.6±1.5 54.8
49.1±3.5 80.1±1.2 55.5±3.8 82.6±1.2 58.7±3.3 84.0±1.0 59.1±4.4 82.7±1.4 55.4±3.9 81.9±1.8 56.8±4.6 82.1±1.2 64.8±3.0 83.2±0.9
55.8
51.8±4.8 79.9±1.0 52.9±2.8 81.5±1.8 50.5±2.8 83.9±1.7 56.2±4.4 83.7±1.5 56.2±5.4 82.0±1.3 66.1±3.0 82.2±1.8 55.9±3.5 84.2±1.6
51.7±4.4 84.5±1.9 55.0±3.9 83.2±1.3 49.9±3.3 82.9±2.0 61.0±3.4 84.4±1.2 56.9±3.4 84.0±1.4 57.3±3.1 82.3±1.3 50.0±3.5 70.4±2.5 62.2±3.1 70.1±1.0 61.8±3.8 73.8±2.2 63.8±3.0 76.2±0.4 64.4±2.1 73.1±1.6 66.5±2.5 73.6±1.1 66.1±3.7
57.3
55.1±3.1 57.1±6.2 73.9±2.3 70.8±3.6 64.2±5.3 66.0±2.7 69.6±1.9 71.6±2.5 54.1±10.1 69.9±3.0 75.0±2.9 72.7±2.0 66.7±1.4 67.4±2.5 75.4±1.4 68.5±2.8 67.1±1.7 65.9±3.2 73.8±1.5 72.2±1.6 67.8±2.7 70.3±2.0 w71.2±1.0 w w. i G r o75.1±1.1 w. o r g ® 69.0±2.5 67.8±1.3
58.2±2.0 59.1±2.0
57.4±0.8 61.9±1.6
58.8±1.0 60.9±1.4
59.5±5.2 60.3±3.0 66.0±2.3 60.2±4.1 68.7±3.2 61.8±3.7 68.2±2.2
62.9±1.6 63.7±3.8 67.0±3.2 64.2±2.5 64.8±3.5 68.5±1.7 66.1±2.7
64.2±1.9 66.5±3.8 68.4±2.4 65.9±1.9 69.0±2.3 71.0±2.3 68.5±2.8
50.4±2.6 51.3±1.2 52.7±1.9 61.7±1.4 59.6±2.3 57.9±1.7 62.5±1.7 65.0±1.8 63.1±1.2 Yield by treatment (bushels/acre) 64.0±1.9 67.3±1.9 64.1±0.8 65.4±2.1 67.3±1.4 65.4±1.6 69.8±1.2 68.2±1.0 67.6±1.0 + Untreated Fungicide Fungicide 67.7±1.4 68.8±1.6 70.1±1.3 Insecticide 55.9±2.0 70.4±2.3 58.1±0.9 67.8±1.3 57.8±2.1 69.6±1.7 58.1±1.8 67.9±0.6 58.2±1.3 70.2±2.3 61.0±2.0 69.5±0.9 63.8±2.6 67.4±1.9
56.4±2.4 69.7±1.6 55.1±2.1 71.5±1.4 59.6±1.8 70.1±1.3 60.8±1.2 71.2±1.1 59.1±2.4 69.7±1.4 63.7±0.8 70.5±1.0 64.4±1.5 70.7±1.8
56.6±2.3 70.7±1.0 59.2±1.4 69.6±0.7 61.3±1.1 68.8±1.3 61.4±2.2 69.8±2.5 61.8±1.7 68.7±1.7 63.1±1.8 69.3±2.0 62.6±1.5 68.7±2.0
62.9±1.2 Average:64.9±1.3 59.0
60.4±3.6 64.3±1.8 61.1±4.7 71.0±1.0 65.5±2.0 65.3±0.8 64.8±2.5 68.5±0.9 61.3±3.9 66.6±0.9 65.3±2.1 70.2±1.0 65.5±3.6 68.1±1.2
59.9
62.7±4.0 68.7±1.2 59.4±4.0 68.0±1.4 63.9±2.3 66.5±0.5 62.7±1.0 68.4±0.8 64.9±2.2 66.6±1.7 62.9±3.6 67.0±0.8 59.8±4.1 66.4±0.7
59.9±3.3 67.1±1.0 56.8±3.1 69.5±0.8 64.1±2.1 68.8±1.8 61.0±3.4 67.6±1.1 59.6±3.7 67.5±1.0 60.3±4.5 67.2±1.9
60.9
58.7±1.4 58.1±2.0 56.3±1.6 51.2±2.4 48.5±2.3 46.1±1.0 50.5±9.1 55.8±2.3 59.1±1.3 54.3±2.1 55.8±1.5 50.1±1.7 61.3±1.5 58.2±1.5 57.1±1.2 52.1±1.3 55.9±1.4 51.8±1.2 56.4±3.9 59.0±1.1 61.3±1.5 56.7±1.6 57.2±1.1 56.5±0.9 57.1±1.0 57.0±1.5 60.2±1.5 58.8±3.3 56.7±2.9 54.8±1.2 56.7±0.9 56.7±1.6 60.1±1.5 58.2±2.0 57.4±0.8Board of 58.8±1.0 © 2015 South Dakota Regents 59.0±1.3 58.6±1.1 62.3±0.7
160a 180a Maya 60 80 100 120 140 160 180 Maya 60d 80c 100date b 3/ Planting 120 ab Seeding Rate 140a 4 (thousands) 160a 180a Maybb May 60 60b 80 80a 100 100ab 120 120ab 140 140a 160 160a 180 180a Mayab May 60bb 60 80ab 80 100 100ab a 120 120ab a 140 140ab a 160 160aa 180 180ab a Mayaa May 60ab b 60 80 a 80ab 100 100aa 120aa 120 140aa 140 160aa 160 180a
73.6±1.1 74.5±1.0
71.2±1.0 75.5±1.6
75.1±1.1 73.3±1.7
74.3±1.5 72.9±1.8 69.2±1.3 69.4±2.4 72.7±2.2 73.2±1.3 73.1±1.3
73.7±1.6 73.2±1.2 72.3±0.8 74.8±2.2 73.4±1.3 71.3±1.3 74.6±1.8
76.1±1.4 72.0±1.0 75.6±2.1 71.6±1.3 75.7±1.3 71.7±1.0 73.5±2.1
160 180 Juneb 60b 80ab 100a 120ab 140a 160a 180a Juneb 60d 80c 100date b 3/ Planting 120 Seeding bRate 140ab 4 (thousands) 160a 180a Juneaa June 60 60b 80 80b 100 100a 120 120a 140 140a 160 ab 160 180 ab 180 Juneba June 60b 60 80b 80 100 100a 120 120 ab 140a 140 160 160 ab 180 180 ab Junebb June 60 60 80 80 100 100 120 120 140 140 160 160 180
2017 Yield: Volga Farm Beresfordb
2017b South Shorea
Year1/ Location2
2016a Volga c c South Shore
Brookings Volgaa c
Beresfordcb Brookings
66.5±1.6 65.2±1.6 68.3±0.9 64.6±2.4 69.6±1.5 74.6±1.3 71.6±1.6 72.4±1.8 73.3±1.2 Yield by treatment (bushels/acre) 73.7±1.5 76.1±1.6 74.7±1.2 74.8±1.2 76.9±1.7 75.3±0.7 76.9±1.2 80.0±1.1 75.4±1.9+ Untreated Fungicide Fungicide 77.6±1.7 78.5±1.3 77.2±1.9 Insecticide 51.8±1.7 63.4±2.2 53.1±1.2 58.0±2.5 53.0±1.1 55.6±1.4 53.1±1.0 57.3±3.0 56.7±2.2 54.6±1.8 58.1±1.3 50.4±1.9 57.6±1.5 54.6±3.1
52.3±1.6 62.8±4.0 57.4±3.0 57.3±2.6 56.9±1.5 58.3±2.6 54.4±2.0 57.6±2.7 56.3±2.0 53.9±0.9 58.6±1.6 54.6±2.4 54.9±1.9 53.1±1.8
55.2±1.1 59.7±2.0 59.1±1.6 58.0±1.7 55.4±1.6 53.5±1.7 59.0±1.3 55.5±2.6 57.8±2.8 56.7±2.7 57.3±1.7 53.7±2.6 57.6±1.7 54.5±1.8
46.1±3.1 Average:81.6±1.5 54.8
49.1±3.5 80.1±1.2 55.5±3.8 82.6±1.2 58.7±3.3 84.0±1.0 59.1±4.4 82.7±1.4 55.4±3.9 81.9±1.8 56.8±4.6 82.1±1.2 64.8±3.0 83.2±0.9
55.8
51.8±4.8 79.9±1.0 52.9±2.8 81.5±1.8 50.5±2.8 83.9±1.7 56.2±4.4 83.7±1.5 56.2±5.4 82.0±1.3 66.1±3.0 82.2±1.8 55.9±3.5 84.2±1.6
51.7±4.4 84.5±1.9 55.0±3.9 83.2±1.3 49.9±3.3 82.9±2.0 61.0±3.4 84.4±1.2 56.9±3.4 84.0±1.4 57.3±3.1 82.3±1.3 50.0±3.5 70.4±2.5 62.2±3.1 70.1±1.0 61.8±3.8 73.8±2.2 63.8±3.0 76.2±0.4 64.4±2.1 73.1±1.6 66.5±2.5 73.6±1.1 66.1±3.7
57.3
55.1±3.1 57.1±6.2 73.9±2.3 70.8±3.6 64.2±5.3 66.0±2.7 69.6±1.9 71.6±2.5 54.1±10.1 69.9±3.0 75.0±2.9 72.7±2.0 66.7±1.4 67.4±2.5 75.4±1.4 68.5±2.8 67.1±1.7 65.9±3.2 73.8±1.5 72.2±1.6 67.8±2.7 70.3±2.0 w71.2±1.0 w w. i G r o75.1±1.1 w. o r g ® 69.0±2.5 67.8±1.3
58.2±2.0 59.1±2.0
57.4±0.8 61.9±1.6
58.8±1.0 60.9±1.4
59.5±5.2 60.3±3.0 66.0±2.3 60.2±4.1 68.7±3.2 61.8±3.7 68.2±2.2
62.9±1.6 63.7±3.8 67.0±3.2 64.2±2.5 64.8±3.5 68.5±1.7 66.1±2.7
64.2±1.9 66.5±3.8 68.4±2.4 65.9±1.9 69.0±2.3 71.0±2.3 68.5±2.8
50.4±2.6 51.3±1.2 52.7±1.9 61.7±1.4 59.6±2.3 57.9±1.7 62.5±1.7 65.0±1.8 63.1±1.2 Yield by treatment (bushels/acre) 64.0±1.9 67.3±1.9 64.1±0.8 65.4±2.1 67.3±1.4 65.4±1.6 69.8±1.2 68.2±1.0 67.6±1.0 + Untreated Fungicide Fungicide 67.7±1.4 68.8±1.6 70.1±1.3 Insecticide 55.9±2.0 70.4±2.3 58.1±0.9 67.8±1.3 57.8±2.1 69.6±1.7 58.1±1.8 67.9±0.6 58.2±1.3 70.2±2.3 61.0±2.0 69.5±0.9 63.8±2.6 67.4±1.9
56.4±2.4 69.7±1.6 55.1±2.1 71.5±1.4 59.6±1.8 70.1±1.3 60.8±1.2 71.2±1.1 59.1±2.4 69.7±1.4 63.7±0.8 70.5±1.0 64.4±1.5 70.7±1.8
56.6±2.3 70.7±1.0 59.2±1.4 69.6±0.7 61.3±1.1 68.8±1.3 61.4±2.2 69.8±2.5 61.8±1.7 68.7±1.7 63.1±1.8 69.3±2.0 62.6±1.5 68.7±2.0
62.9±1.2 Average:64.9±1.3 59.0
60.4±3.6 64.3±1.8 61.1±4.7 71.0±1.0 65.5±2.0 65.3±0.8 64.8±2.5 68.5±0.9 61.3±3.9 66.6±0.9 65.3±2.1 70.2±1.0 65.5±3.6 68.1±1.2
59.9
62.7±4.0 68.7±1.2 59.4±4.0 68.0±1.4 63.9±2.3 66.5±0.5 62.7±1.0 68.4±0.8 64.9±2.2 66.6±1.7 62.9±3.6 67.0±0.8 59.8±4.1 66.4±0.7
59.9±3.3 67.1±1.0 56.8±3.1 69.5±0.8 64.1±2.1 68.8±1.8 61.0±3.4 67.6±1.1 59.6±3.7 67.5±1.0 60.3±4.5 67.2±1.9
60.9
58.7±1.4 58.1±2.0 56.3±1.6 51.2±2.4 48.5±2.3 46.1±1.0 50.5±9.1 55.8±2.3 59.1±1.3 54.3±2.1 55.8±1.5 50.1±1.7 61.3±1.5 58.2±1.5 57.1±1.2 52.1±1.3 55.9±1.4 51.8±1.2 56.4±3.9 59.0±1.1 61.3±1.5 56.7±1.6 57.2±1.1 56.5±0.9 57.1±1.0 57.0±1.5 60.2±1.5 58.8±3.3 56.7±2.9 54.8±1.2 56.7±0.9 56.7±1.6 60.1±1.5 58.2±2.0 57.4±0.8Board of 58.8±1.0 © 2015 South Dakota Regents 59.0±1.3 58.6±1.1 62.3±0.7
160 180 Maya 60d 80c 100b 120ab 140a 160a 180a Mayb 60b 80a 100 Planting ab date3/ 120 ab Seeding Rate 140a 4 (thousands) 160a 180a Maybb May 60 60b 80 80b 100 100ab 120 120ab 140 140ab 160 160a 180 180ab Mayaa May 60bb 60 80aa 80 100aa 100 120aa 120 140aa 140 160aa 160 180aa 180 Maya 60ab 80ab 100a 120a 140a 160a
73.2±1.3 73.1±1.3
71.3±1.3 74.6±1.8
71.7±1.0 73.5±2.1
66.5±1.6 64.6±2.4 71.6±1.6 73.7±1.5 74.8±1.2 76.9±1.2 77.6±1.7
65.2±1.6 69.6±1.5 72.4±1.8 76.1±1.6 76.9±1.7 80.0±1.1 78.5±1.3
68.3±0.9 74.6±1.3 73.3±1.2 74.7±1.2 75.3±0.7 75.4±1.9 77.2±1.9
160a 180a Juneb 60d 80c 100b 120b 140ab 160a 180a Junea 60b 80b 100 a 3/ Planting date 120 Seeding aRate 140a 4 (thousands) 160ab 180ab Junea 60 80 100 120 140 160 180 Juneb 60b 60 80b 80 100a 100 120 120 ab 140 140a 160 160 ab 180 180 ab Juneb 60 80 100 120 140 160
61.8±3.7 68.2±2.2
68.5±1.7 66.1±2.7
71.0±2.3 68.5±2.8
50.4±2.6 61.7±1.4 62.5±1.7 64.0±1.9 65.4±2.1 69.8±1.2 67.7±1.4
51.3±1.2 59.6±2.3 65.0±1.8 67.3±1.9 67.3±1.4 68.2±1.0 68.8±1.6
52.7±1.9 57.9±1.7 63.1±1.2 64.1±0.8 65.4±1.6 67.6±1.0 70.1±1.3
2017 Yield: Brookings Farm 2017b South Shorea
Volgac
Year1/ Location2
2016a Brookings South Shorecc
Beresford Volgaa b
Brookingsc
51.8±1.7 52.3±1.6 55.2±1.1 53.1±1.2 57.4±3.0 59.1±1.6 53.0±1.1 56.9±1.5 55.4±1.6 Yield by treatment (bushels/acre) 53.1±1.0 54.4±2.0 59.0±1.3 56.7±2.2 56.3±2.0 57.8±2.8 58.1±1.3 58.6±1.6 57.3±1.7+ Untreated Fungicide Fungicide 57.6±1.5 54.9±1.9 57.6±1.7 Insecticide 46.1±3.1 63.4±2.2 51.7±4.4 58.0±2.5 55.0±3.9 55.6±1.4 49.9±3.3 57.3±3.0 61.0±3.4 54.6±1.8 56.9±3.4 50.4±1.9 57.3±3.1 54.6±3.1
49.1±3.5 62.8±4.0 55.5±3.8 57.3±2.6 58.7±3.3 58.3±2.6 59.1±4.4 57.6±2.7 55.4±3.9 53.9±0.9 56.8±4.6 54.6±2.4 64.8±3.0 53.1±1.8
51.8±4.8 59.7±2.0 52.9±2.8 58.0±1.7 50.5±2.8 53.5±1.7 56.2±4.4 55.5±2.6 56.2±5.4 56.7±2.7 66.1±3.0 53.7±2.6 55.9±3.5 54.5±1.8
50.0±3.5 Average:81.6±1.5 54.0
55.1±3.1 80.1±1.2 64.2±5.3 82.6±1.2 54.1±10.1 84.0±1.0 66.7±1.4 82.7±1.4 67.1±1.7 81.9±1.8 67.8±2.7 82.1±1.2 69.0±2.5 83.2±0.9
57.1
57.1±6.2 79.9±1.0 66.0±2.7 81.5±1.8 69.9±3.0 83.9±1.7 67.4±2.5 83.7±1.5 65.9±3.2 82.0±1.3 70.3±2.0 82.2±1.8 67.8±1.3 84.2±1.6
62.2±3.1 84.5±1.9 61.8±3.8 83.2±1.3 63.8±3.0 82.9±2.0 64.4±2.1 84.4±1.2 66.5±2.5 84.0±1.4 66.1±3.7 82.3±1.3
55.7
1.7 bu/acre increase
70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6 73.6±1.1
73.9±2.3 70.8±3.6 69.6±1.9 71.6±2.5 75.0±2.9 72.7±2.0 75.4±1.4 68.5±2.8 73.8±1.5 72.2±1.6 w71.2±1.0 w w. i G r o75.1±1.1 w. o r g ®
55.9±2.0 56.4±2.4 56.6±2.3 58.1±0.9 55.1±2.1 59.2±1.4 57.8±2.1 59.6±1.8 61.3±1.1 Yield by treatment (bushels/acre) 58.1±1.8 60.8±1.2 61.4±2.2 58.2±1.3 59.1±2.4 61.8±1.7 61.0±2.0 63.7±0.8 63.1±1.8 + Untreated Fungicide Fungicide 63.8±2.6 64.4±1.5 62.6±1.5 Insecticide 62.9±1.2 70.4±2.3 59.9±3.3 67.8±1.3 56.8±3.1 69.6±1.7 64.1±2.1 67.9±0.6 61.0±3.4 70.2±2.3 59.6±3.7 69.5±0.9 60.3±4.5 67.4±1.9
60.4±3.6 69.7±1.6 61.1±4.7 71.5±1.4 65.5±2.0 70.1±1.3 64.8±2.5 71.2±1.1 61.3±3.9 69.7±1.4 65.3±2.1 70.5±1.0 65.5±3.6 70.7±1.8
62.7±4.0 70.7±1.0 59.4±4.0 69.6±0.7 63.9±2.3 68.8±1.3 62.7±1.0 69.8±2.5 64.9±2.2 68.7±1.7 62.9±3.6 69.3±2.0 59.8±4.1 68.7±2.0
58.7±1.4 Average:64.9±1.3 60.7
58.1±2.0 64.3±1.8 55.8±2.3 71.0±1.0 58.2±1.5 65.3±0.8 59.0±1.1 68.5±0.9 57.0±1.5 66.6±0.9 56.7±1.6 70.2±1.0 58.6±1.1 68.1±1.2
63.4
56.3±1.6 68.7±1.2 59.1±1.3 68.0±1.4 57.1±1.2 66.5±0.5 61.3±1.5 68.4±0.8 60.2±1.5 66.6±1.7 60.1±1.5 67.0±0.8 62.3±0.7 66.4±0.7
50.5±9.1 67.1±1.0 61.3±1.5 69.5±0.8 56.4±3.9 68.8±1.8 57.1±1.0 67.6±1.1 56.7±0.9 67.5±1.0 59.0±1.3 67.2±1.9
62.3
1.6 bu/acre increase
51.2±2.4 48.5±2.3 46.1±1.0 54.3±2.1 55.8±1.5 50.1±1.7 52.1±1.3 55.9±1.4 51.8±1.2 56.7±1.6 57.2±1.1 56.5±0.9 58.8±3.3 56.7±2.9 54.8±1.2 58.2±2.0 57.4±0.8Board of 58.8±1.0 © 2015 South Dakota Regents
160 180 Maya 60d 80c 100b 120ab 140a 160a 180a Mayb 60b 80a 100 Planting ab date3/ 120 ab Seeding Rate 140a 4 (thousands) 160a 180a Maybb May 60 60b 80 80b 100 100ab 120 120ab 140 140ab 160 160a 180 180ab Mayaa May 60bb 60 80aa 80 100aa 100 120aa 120 140aa 140 160aa 160 180aa 180 Maya 60ab 80ab 100a 120a 140a 160a
73.2±1.3 73.1±1.3
71.3±1.3 74.6±1.8
71.7±1.0 73.5±2.1
66.5±1.6 64.6±2.4 71.6±1.6 73.7±1.5 74.8±1.2 76.9±1.2 77.6±1.7
65.2±1.6 69.6±1.5 72.4±1.8 76.1±1.6 76.9±1.7 80.0±1.1 78.5±1.3
68.3±0.9 74.6±1.3 73.3±1.2 74.7±1.2 75.3±0.7 75.4±1.9 77.2±1.9
160a 180a Juneb 60d 80c 100b 120b 140ab 160a 180a Junea 60b 80b 100 a 3/ Planting date 120 Seeding aRate 140a 4 (thousands) 160ab 180ab Junea 60 80 100 120 140 160 180 Juneb 60b 60 80b 80 100a 100 120 120 ab 140 140a 160 160 ab 180 180 ab Juneb 60 80 100 120 140 160
61.8±3.7 68.2±2.2
68.5±1.7 66.1±2.7
71.0±2.3 68.5±2.8
50.4±2.6 61.7±1.4 62.5±1.7 64.0±1.9 65.4±2.1 69.8±1.2 67.7±1.4
51.3±1.2 59.6±2.3 65.0±1.8 67.3±1.9 67.3±1.4 68.2±1.0 68.8±1.6
52.7±1.9 57.9±1.7 63.1±1.2 64.1±0.8 65.4±1.6 67.6±1.0 70.1±1.3
2017 Yield: Brookings Farm 2017b South Shorea
Volgac
Year1/ Location2
2016a Brookings South Shorecc
Beresford Volgaa b
Brookingsc
51.8±1.7 52.3±1.6 55.2±1.1 53.1±1.2 57.4±3.0 59.1±1.6 53.0±1.1 56.9±1.5 55.4±1.6 Yield by treatment (bushels/acre) 53.1±1.0 54.4±2.0 59.0±1.3 56.7±2.2 56.3±2.0 57.8±2.8 58.1±1.3 58.6±1.6 57.3±1.7+ Untreated Fungicide Fungicide 57.6±1.5 54.9±1.9 57.6±1.7 Insecticide 46.1±3.1 63.4±2.2 51.7±4.4 58.0±2.5 55.0±3.9 55.6±1.4 49.9±3.3 57.3±3.0 61.0±3.4 54.6±1.8 56.9±3.4 50.4±1.9 57.3±3.1 54.6±3.1
49.1±3.5 62.8±4.0 55.5±3.8 57.3±2.6 58.7±3.3 58.3±2.6 59.1±4.4 57.6±2.7 55.4±3.9 53.9±0.9 56.8±4.6 54.6±2.4 64.8±3.0 53.1±1.8
51.8±4.8 59.7±2.0 52.9±2.8 58.0±1.7 50.5±2.8 53.5±1.7 56.2±4.4 55.5±2.6 56.2±5.4 56.7±2.7 66.1±3.0 53.7±2.6 55.9±3.5 54.5±1.8
50.0±3.5 Average:81.6±1.5 54.0
55.1±3.1 80.1±1.2 64.2±5.3 82.6±1.2 54.1±10.1 84.0±1.0 66.7±1.4 82.7±1.4 67.1±1.7 81.9±1.8 67.8±2.7 82.1±1.2 69.0±2.5 83.2±0.9
57.1
57.1±6.2 79.9±1.0 66.0±2.7 81.5±1.8 69.9±3.0 83.9±1.7 67.4±2.5 83.7±1.5 65.9±3.2 82.0±1.3 70.3±2.0 82.2±1.8 67.8±1.3 84.2±1.6
62.2±3.1 84.5±1.9 61.8±3.8 83.2±1.3 63.8±3.0 82.9±2.0 64.4±2.1 84.4±1.2 66.5±2.5 84.0±1.4 66.1±3.7 82.3±1.3
70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6 73.6±1.1
55.7
73.9±2.3 70.8±3.6 69.6±1.9 71.6±2.5 75.0±2.9 72.7±2.0 75.4±1.4 68.5±2.8 73.8±1.5 72.2±1.6 w71.2±1.0 w w. i G r o75.1±1.1 w. o r g ®
55.9±2.0 56.4±2.4 56.6±2.3 58.1±0.9 55.1±2.1 59.2±1.4 57.8±2.1 59.6±1.8 61.3±1.1 Yield by treatment (bushels/acre) 58.1±1.8 60.8±1.2 61.4±2.2 58.2±1.3 59.1±2.4 61.8±1.7 61.0±2.0 63.7±0.8 63.1±1.8 + Untreated Fungicide Fungicide 63.8±2.6 64.4±1.5 62.6±1.5 Insecticide 62.9±1.2 70.4±2.3 59.9±3.3 67.8±1.3 56.8±3.1 69.6±1.7 64.1±2.1 67.9±0.6 61.0±3.4 70.2±2.3 59.6±3.7 69.5±0.9 60.3±4.5 67.4±1.9
60.4±3.6 69.7±1.6 61.1±4.7 71.5±1.4 65.5±2.0 70.1±1.3 64.8±2.5 71.2±1.1 61.3±3.9 69.7±1.4 65.3±2.1 70.5±1.0 65.5±3.6 70.7±1.8
62.7±4.0 70.7±1.0 59.4±4.0 69.6±0.7 63.9±2.3 68.8±1.3 62.7±1.0 69.8±2.5 64.9±2.2 68.7±1.7 62.9±3.6 69.3±2.0 59.8±4.1 68.7±2.0
58.7±1.4 Average:64.9±1.3 60.7
58.1±2.0 64.3±1.8 55.8±2.3 71.0±1.0 58.2±1.5 65.3±0.8 59.0±1.1 68.5±0.9 57.0±1.5 66.6±0.9 56.7±1.6 70.2±1.0 58.6±1.1 68.1±1.2
63.4
56.3±1.6 68.7±1.2 59.1±1.3 68.0±1.4 57.1±1.2 66.5±0.5 61.3±1.5 68.4±0.8 60.2±1.5 66.6±1.7 60.1±1.5 67.0±0.8 62.3±0.7 66.4±0.7
50.5±9.1 67.1±1.0 61.3±1.5 69.5±0.8 56.4±3.9 68.8±1.8 57.1±1.0 67.6±1.1 56.7±0.9 67.5±1.0 59.0±1.3 67.2±1.9
62.3
51.2±2.4 48.5±2.3 46.1±1.0 54.3±2.1 55.8±1.5 50.1±1.7 52.1±1.3 55.9±1.4 51.8±1.2 56.7±1.6 57.2±1.1 56.5±0.9 58.8±3.3 56.7±2.9 54.8±1.2 58.2±2.0 57.4±0.8Board of 58.8±1.0 © 2015 South Dakota Regents
160 180 Maya 60d 80c 100b 120ab 140a 160a 180a Mayb 60b 80a 100 Planting ab date3/ 120 ab Seeding Rate 140a 4 (thousands) 160a 180a Maybb May 60 60b 80 80b 100 100ab 120 120ab 140 140ab 160 160a 180 180ab Mayaa May 60bb 60 80aa 80 100aa 100 120aa 120 140aa 140 160aa 160 180aa 180 Maya 60ab 80ab 100a 120a 140a 160a
73.2±1.3 73.1±1.3
71.3±1.3 74.6±1.8
71.7±1.0 73.5±2.1
66.5±1.6 64.6±2.4 71.6±1.6 73.7±1.5 74.8±1.2 76.9±1.2 77.6±1.7
65.2±1.6 69.6±1.5 72.4±1.8 76.1±1.6 76.9±1.7 80.0±1.1 78.5±1.3
68.3±0.9 74.6±1.3 73.3±1.2 74.7±1.2 75.3±0.7 75.4±1.9 77.2±1.9
160a 180a Juneb 60d 80c 100b 120b 140ab 160a 180a Junea 60b 80b 100 a 3/ Planting date 120 Seeding aRate 140a 4 (thousands) 160ab 180ab Junea 60 80 100 120 140 160 180 Juneb 60b 60 80b 80 100a 100 120 120 ab 140 140a 160 160 ab 180 180 ab Juneb 60 80 100 120 140 160
61.8±3.7 68.2±2.2
68.5±1.7 66.1±2.7
71.0±2.3 68.5±2.8
50.4±2.6 61.7±1.4 62.5±1.7 64.0±1.9 65.4±2.1 69.8±1.2 67.7±1.4
51.3±1.2 59.6±2.3 65.0±1.8 67.3±1.9 67.3±1.4 68.2±1.0 68.8±1.6
52.7±1.9 57.9±1.7 63.1±1.2 64.1±0.8 65.4±1.6 67.6±1.0 70.1±1.3
2017 Yield: Brookings Farm 2017b South Shorea
Volgac
Year1/ Location2
2016a Brookings South Shorecc
Beresford Volgaa b
Brookingsc
51.8±1.7 52.3±1.6 55.2±1.1 53.1±1.2 57.4±3.0 59.1±1.6 53.0±1.1 56.9±1.5 55.4±1.6 Yield by treatment (bushels/acre) 53.1±1.0 54.4±2.0 59.0±1.3 56.7±2.2 56.3±2.0 57.8±2.8 58.1±1.3 58.6±1.6 57.3±1.7+ Untreated Fungicide Fungicide 57.6±1.5 54.9±1.9 57.6±1.7 Insecticide 46.1±3.1 63.4±2.2 51.7±4.4 58.0±2.5 55.0±3.9 55.6±1.4 49.9±3.3 57.3±3.0 61.0±3.4 54.6±1.8 56.9±3.4 50.4±1.9 57.3±3.1 54.6±3.1
49.1±3.5 62.8±4.0 55.5±3.8 57.3±2.6 58.7±3.3 58.3±2.6 59.1±4.4 57.6±2.7 55.4±3.9 53.9±0.9 56.8±4.6 54.6±2.4 64.8±3.0 53.1±1.8
51.8±4.8 59.7±2.0 52.9±2.8 58.0±1.7 50.5±2.8 53.5±1.7 56.2±4.4 55.5±2.6 56.2±5.4 56.7±2.7 66.1±3.0 53.7±2.6 55.9±3.5 54.5±1.8
50.0±3.5 Average:81.6±1.5 54.0
55.1±3.1 80.1±1.2 64.2±5.3 82.6±1.2 54.1±10.1 84.0±1.0 66.7±1.4 82.7±1.4 67.1±1.7 81.9±1.8 67.8±2.7 82.1±1.2 69.0±2.5 83.2±0.9
57.1
57.1±6.2 79.9±1.0 66.0±2.7 81.5±1.8 69.9±3.0 83.9±1.7 67.4±2.5 83.7±1.5 65.9±3.2 82.0±1.3 70.3±2.0 82.2±1.8 67.8±1.3 84.2±1.6
62.2±3.1 84.5±1.9 61.8±3.8 83.2±1.3 63.8±3.0 82.9±2.0 64.4±2.1 84.4±1.2 66.5±2.5 84.0±1.4 66.1±3.7 82.3±1.3
70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6 73.6±1.1
55.7
73.9±2.3 70.8±3.6 69.6±1.9 71.6±2.5 75.0±2.9 72.7±2.0 75.4±1.4 68.5±2.8 73.8±1.5 72.2±1.6 w71.2±1.0 w w. i G r o75.1±1.1 w. o r g ®
55.9±2.0 56.4±2.4 56.6±2.3 58.1±0.9 55.1±2.1 59.2±1.4 57.8±2.1 59.6±1.8 61.3±1.1 Yield by treatment (bushels/acre) 58.1±1.8 60.8±1.2 61.4±2.2 58.2±1.3 59.1±2.4 61.8±1.7 61.0±2.0 63.7±0.8 63.1±1.8 + Untreated Fungicide Fungicide 63.8±2.6 64.4±1.5 62.6±1.5 Insecticide 62.9±1.2 70.4±2.3 59.9±3.3 67.8±1.3 56.8±3.1 69.6±1.7 64.1±2.1 67.9±0.6 61.0±3.4 70.2±2.3 59.6±3.7 69.5±0.9 60.3±4.5 67.4±1.9
60.4±3.6 69.7±1.6 61.1±4.7 71.5±1.4 65.5±2.0 70.1±1.3 64.8±2.5 71.2±1.1 61.3±3.9 69.7±1.4 65.3±2.1 70.5±1.0 65.5±3.6 70.7±1.8
62.7±4.0 70.7±1.0 59.4±4.0 69.6±0.7 63.9±2.3 68.8±1.3 62.7±1.0 69.8±2.5 64.9±2.2 68.7±1.7 62.9±3.6 69.3±2.0 59.8±4.1 68.7±2.0
58.7±1.4 Average:64.9±1.3 60.7
58.1±2.0 64.3±1.8 55.8±2.3 71.0±1.0 58.2±1.5 65.3±0.8 59.0±1.1 68.5±0.9 57.0±1.5 66.6±0.9 56.7±1.6 70.2±1.0 58.6±1.1 68.1±1.2
63.4
56.3±1.6 68.7±1.2 59.1±1.3 68.0±1.4 57.1±1.2 66.5±0.5 61.3±1.5 68.4±0.8 60.2±1.5 66.6±1.7 60.1±1.5 67.0±0.8 62.3±0.7 66.4±0.7
50.5±9.1 67.1±1.0 61.3±1.5 69.5±0.8 56.4±3.9 68.8±1.8 57.1±1.0 67.6±1.1 56.7±0.9 67.5±1.0 59.0±1.3 67.2±1.9
62.3
51.2±2.4 48.5±2.3 46.1±1.0 54.3±2.1 55.8±1.5 50.1±1.7 52.1±1.3 55.9±1.4 51.8±1.2 56.7±1.6 57.2±1.1 56.5±0.9 58.8±3.3 56.7±2.9 54.8±1.2 58.2±2.0 57.4±0.8Board of 58.8±1.0 © 2015 South Dakota Regents
140a 160a 180a Mayb 60b 80a 100ab 120ab 140a 160a 180a Mayb 60b 80b 100 Planting ab date3/ 120 ab Seeding Rate 140ab 4 (thousands) 160a 180ab Mayba May 60 60b 80 80a 100 100a 120 120a 140 140a 160 160a 180 180a Maya 60b 80a 100a 120a 140a 160a 180a Maya 60ab 80ab 100a 120a 140a 160a
74.8±1.2 76.9±1.2 77.6±1.7
76.9±1.7 80.0±1.1 78.5±1.3
75.3±0.7 75.4±1.9 77.2±1.9
51.8±1.7 53.1±1.2 53.0±1.1 53.1±1.0 56.7±2.2 58.1±1.3 57.6±1.5
52.3±1.6 57.4±3.0 56.9±1.5 54.4±2.0 56.3±2.0 58.6±1.6 54.9±1.9
55.2±1.1 59.1±1.6 55.4±1.6 59.0±1.3 57.8±2.8 57.3±1.7 57.6±1.7
140ab 160a 180a Junea 60b 80b 100a 120a 140a 160ab 180ab Junea 60 80 100 Planting date3/ 120Rate Seeding 4 140 (thousands) 160 180 Juneab 60 80 100 120 140 160 180 Juneb 60b 80b 100a 120ab 140a 160ab 180ab Juneb 60 80 100 120 140 160
65.4±2.1 69.8±1.2 67.7±1.4
67.3±1.4 68.2±1.0 68.8±1.6
65.4±1.6 67.6±1.0 70.1±1.3
55.9±2.0 58.1±0.9 57.8±2.1 58.1±1.8 58.2±1.3 61.0±2.0 63.8±2.6
56.4±2.4 55.1±2.1 59.6±1.8 60.8±1.2 59.1±2.4 63.7±0.8 64.4±1.5
56.6±2.3 59.2±1.4 61.3±1.1 61.4±2.2 61.8±1.7 63.1±1.8 62.6±1.5
2017 Yield: Southeast Farm Volgac
Brookingsc
Year1/ Location2
2016a Beresford bc South Shore
Volgaa
Brookingsc
46.1±3.1 49.1±3.5 51.8±4.8 51.7±4.4 55.5±3.8 52.9±2.8 55.0±3.9 58.7±3.3 50.5±2.8 Yield by treatment (bushels/acre) 49.9±3.3 59.1±4.4 56.2±4.4 61.0±3.4 55.4±3.9 56.2±5.4 56.9±3.4 56.8±4.6 66.1±3.0+ Untreated Fungicide Fungicide 57.3±3.1 64.8±3.0 55.9±3.5 Insecticide 50.0±3.5 63.4±2.2 62.2±3.1 58.0±2.5 61.8±3.8 55.6±1.4 63.8±3.0 57.3±3.0 64.4±2.1 54.6±1.8 66.5±2.5 50.4±1.9 66.1±3.7 54.6±3.1
Average:81.6±1.5 62.1 84.5±1.9 83.2±1.3 82.9±2.0 84.4±1.2 84.0±1.4 82.3±1.3
55.1±3.1 62.8±4.0 64.2±5.3 57.3±2.6 54.1±10.1 58.3±2.6 66.7±1.4 57.6±2.7 67.1±1.7 53.9±0.9 67.8±2.7 54.6±2.4 69.0±2.5 53.1±1.8
57.1±6.2 59.7±2.0 66.0±2.7 58.0±1.7 69.9±3.0 53.5±1.7 67.4±2.5 55.5±2.6 65.9±3.2 56.7±2.7 70.3±2.0 53.7±2.6 67.8±1.3 54.5±1.8
80.1±1.2 82.6±1.2 84.0±1.0 82.7±1.4 81.9±1.8 82.1±1.2 83.2±0.9
79.9±1.0 81.5±1.8 83.9±1.7 83.7±1.5 82.0±1.3 82.2±1.8 84.2±1.6
63.4
66.3
4.2 bu/acre increase
70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6 73.6±1.1
73.9±2.3 70.8±3.6 69.6±1.9 71.6±2.5 75.0±2.9 72.7±2.0 75.4±1.4 68.5±2.8 73.8±1.5 w71.2±1.0 w w. i G r o72.2±1.6 w. o r g ® 75.1±1.1
62.9±1.2 60.4±3.6 62.7±4.0 59.9±3.3 61.1±4.7 59.4±4.0 56.8±3.1 65.5±2.0 63.9±2.3 Yield by treatment (bushels/acre) 64.1±2.1 64.8±2.5 62.7±1.0 61.0±3.4 61.3±3.9 64.9±2.2 59.6±3.7 65.3±2.1 62.9±3.6 + Untreated Fungicide Fungicide 60.3±4.5 65.5±3.6 59.8±4.1 Insecticide 58.7±1.4 70.4±2.3 50.5±9.1 67.8±1.3 61.3±1.5 69.6±1.7 56.4±3.9 67.9±0.6 57.1±1.0 70.2±2.3 56.7±0.9 69.5±0.9 59.0±1.3 67.4±1.9
58.1±2.0 69.7±1.6 55.8±2.3 71.5±1.4 58.2±1.5 70.1±1.3 59.0±1.1 71.2±1.1 57.0±1.5 69.7±1.4 56.7±1.6 70.5±1.0 58.6±1.1 70.7±1.8
56.3±1.6 70.7±1.0 59.1±1.3 69.6±0.7 57.1±1.2 68.8±1.3 61.3±1.5 69.8±2.5 60.2±1.5 68.7±1.7 60.1±1.5 69.3±2.0 62.3±0.7 68.7±2.0
Average:64.9±1.3 57.1 67.1±1.0
64.3±1.8 71.0±1.0 65.3±0.8 68.5±0.9 66.6±0.9 70.2±1.0 68.1±1.2
68.7±1.2 68.0±1.4 66.5±0.5 68.4±0.8 66.6±1.7 67.0±0.8 66.4±0.7
69.5±0.8 68.8±1.8 67.6±1.1 67.5±1.0 67.2±1.9
57.6
59.5
2.4 bu/acre increase
51.2±2.4 48.5±2.3 46.1±1.0 54.3±2.1 55.8±1.5 50.1±1.7 52.1±1.3 55.9±1.4 51.8±1.2 56.7±1.6 57.2±1.1 56.5±0.9 58.8±3.3 56.7±2.9 54.8±1.2 © 2015 South Dakota Regents 58.2±2.0 57.4±0.8Board of 58.8±1.0
140a 160a 180a Mayb 60b 80a 100ab 120ab 140a 160a 180a Mayb 60b 80b 100 Planting ab date3/ 120 ab Seeding Rate 140ab 4 (thousands) 160a 180ab Mayba May 60 60b 80 80a 100 100a 120 120a 140 140a 160 160a 180 180a Maya 60b 80a 100a 120a 140a 160a 180a Maya 60ab 80ab 100a 120a 140a 160a
74.8±1.2 76.9±1.2 77.6±1.7
76.9±1.7 80.0±1.1 78.5±1.3
75.3±0.7 75.4±1.9 77.2±1.9
51.8±1.7 53.1±1.2 53.0±1.1 53.1±1.0 56.7±2.2 58.1±1.3 57.6±1.5
52.3±1.6 57.4±3.0 56.9±1.5 54.4±2.0 56.3±2.0 58.6±1.6 54.9±1.9
55.2±1.1 59.1±1.6 55.4±1.6 59.0±1.3 57.8±2.8 57.3±1.7 57.6±1.7
140ab 160a 180a Junea 60b 80b 100a 120a 140a 160ab 180ab Junea 60 80 100 Planting date3/ 120Rate Seeding 4 140 (thousands) 160 180 Juneab 60 80 100 120 140 160 180 Juneb 60b 80b 100a 120ab 140a 160ab 180ab Juneb 60 80 100 120 140 160
65.4±2.1 69.8±1.2 67.7±1.4
67.3±1.4 68.2±1.0 68.8±1.6
65.4±1.6 67.6±1.0 70.1±1.3
55.9±2.0 58.1±0.9 57.8±2.1 58.1±1.8 58.2±1.3 61.0±2.0 63.8±2.6
56.4±2.4 55.1±2.1 59.6±1.8 60.8±1.2 59.1±2.4 63.7±0.8 64.4±1.5
56.6±2.3 59.2±1.4 61.3±1.1 61.4±2.2 61.8±1.7 63.1±1.8 62.6±1.5
2017 Yield: Southeast Farm Volgac
Brookingsc
Year1/ Location2
2016a Beresford bc South Shore
Volgaa
Brookingsc
46.1±3.1 49.1±3.5 51.8±4.8 51.7±4.4 55.5±3.8 52.9±2.8 55.0±3.9 58.7±3.3 50.5±2.8 Yield by treatment (bushels/acre) 49.9±3.3 59.1±4.4 56.2±4.4 61.0±3.4 55.4±3.9 56.2±5.4 56.9±3.4 56.8±4.6 66.1±3.0+ Untreated Fungicide Fungicide 57.3±3.1 64.8±3.0 55.9±3.5 Insecticide 50.0±3.5 63.4±2.2 62.2±3.1 58.0±2.5 61.8±3.8 55.6±1.4 63.8±3.0 57.3±3.0 64.4±2.1 54.6±1.8 66.5±2.5 50.4±1.9 66.1±3.7 54.6±3.1
Average:81.6±1.5 62.1 84.5±1.9 83.2±1.3 82.9±2.0 84.4±1.2 84.0±1.4 82.3±1.3 70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6 73.6±1.1
55.1±3.1 62.8±4.0 64.2±5.3 57.3±2.6 54.1±10.1 58.3±2.6 66.7±1.4 57.6±2.7 67.1±1.7 53.9±0.9 67.8±2.7 54.6±2.4 69.0±2.5 53.1±1.8
57.1±6.2 59.7±2.0 66.0±2.7 58.0±1.7 69.9±3.0 53.5±1.7 67.4±2.5 55.5±2.6 65.9±3.2 56.7±2.7 70.3±2.0 53.7±2.6 67.8±1.3 54.5±1.8
80.1±1.2 82.6±1.2 84.0±1.0 82.7±1.4 81.9±1.8 82.1±1.2 83.2±0.9
79.9±1.0 81.5±1.8 83.9±1.7 83.7±1.5 82.0±1.3 82.2±1.8 84.2±1.6
63.4
66.3
73.9±2.3 70.8±3.6 69.6±1.9 71.6±2.5 75.0±2.9 72.7±2.0 75.4±1.4 68.5±2.8 73.8±1.5 w71.2±1.0 w w. i G r o72.2±1.6 w. o r g ® 75.1±1.1
62.9±1.2 60.4±3.6 62.7±4.0 59.9±3.3 61.1±4.7 59.4±4.0 56.8±3.1 65.5±2.0 63.9±2.3 Yield by treatment (bushels/acre) 64.1±2.1 64.8±2.5 62.7±1.0 61.0±3.4 61.3±3.9 64.9±2.2 59.6±3.7 65.3±2.1 62.9±3.6 + Untreated Fungicide Fungicide 60.3±4.5 65.5±3.6 59.8±4.1 Insecticide 58.7±1.4 70.4±2.3 50.5±9.1 67.8±1.3 61.3±1.5 69.6±1.7 56.4±3.9 67.9±0.6 57.1±1.0 70.2±2.3 56.7±0.9 69.5±0.9 59.0±1.3 67.4±1.9
58.1±2.0 69.7±1.6 55.8±2.3 71.5±1.4 58.2±1.5 70.1±1.3 59.0±1.1 71.2±1.1 57.0±1.5 69.7±1.4 56.7±1.6 70.5±1.0 58.6±1.1 70.7±1.8
56.3±1.6 70.7±1.0 59.1±1.3 69.6±0.7 57.1±1.2 68.8±1.3 61.3±1.5 69.8±2.5 60.2±1.5 68.7±1.7 60.1±1.5 69.3±2.0 62.3±0.7 68.7±2.0
Average:64.9±1.3 57.1 67.1±1.0
64.3±1.8 71.0±1.0 65.3±0.8 68.5±0.9 66.6±0.9 70.2±1.0 68.1±1.2
68.7±1.2 68.0±1.4 66.5±0.5 68.4±0.8 66.6±1.7 67.0±0.8 66.4±0.7
69.5±0.8 68.8±1.8 67.6±1.1 67.5±1.0 67.2±1.9
57.6
59.5
51.2±2.4 48.5±2.3 46.1±1.0 54.3±2.1 55.8±1.5 50.1±1.7 52.1±1.3 55.9±1.4 51.8±1.2 56.7±1.6 57.2±1.1 56.5±0.9 58.8±3.3 56.7±2.9 54.8±1.2 © 2015 South Dakota Regents 58.2±2.0 57.4±0.8Board of 58.8±1.0
140a 160a 180a Mayb 60b 80a 100ab 120ab 140a 160a 180a Mayb 60b 80b 100 Planting ab date3/ 120 ab Seeding Rate 140ab 4 (thousands) 160a 180ab Mayba May 60 60b 80 80a 100 100a 120 120a 140 140a 160 160a 180 180a Maya 60b 80a 100a 120a 140a 160a 180a Maya 60ab 80ab 100a 120a 140a 160a
74.8±1.2 76.9±1.2 77.6±1.7
76.9±1.7 80.0±1.1 78.5±1.3
75.3±0.7 75.4±1.9 77.2±1.9
51.8±1.7 53.1±1.2 53.0±1.1 53.1±1.0 56.7±2.2 58.1±1.3 57.6±1.5
52.3±1.6 57.4±3.0 56.9±1.5 54.4±2.0 56.3±2.0 58.6±1.6 54.9±1.9
55.2±1.1 59.1±1.6 55.4±1.6 59.0±1.3 57.8±2.8 57.3±1.7 57.6±1.7
140ab 160a 180a Junea 60b 80b 100a 120a 140a 160ab 180ab Junea 60 80 100 Planting date3/ 120Rate Seeding 4 140 (thousands) 160 180 Juneab 60 80 100 120 140 160 180 Juneb 60b 80b 100a 120ab 140a 160ab 180ab Juneb 60 80 100 120 140 160
65.4±2.1 69.8±1.2 67.7±1.4
67.3±1.4 68.2±1.0 68.8±1.6
65.4±1.6 67.6±1.0 70.1±1.3
55.9±2.0 58.1±0.9 57.8±2.1 58.1±1.8 58.2±1.3 61.0±2.0 63.8±2.6
56.4±2.4 55.1±2.1 59.6±1.8 60.8±1.2 59.1±2.4 63.7±0.8 64.4±1.5
56.6±2.3 59.2±1.4 61.3±1.1 61.4±2.2 61.8±1.7 63.1±1.8 62.6±1.5
2017 Yield: Southeast Farm Volgac
Brookingsc
Year1/ Location2
2016a Beresford bc South Shore
Volgaa
Brookingsc
46.1±3.1 49.1±3.5 51.8±4.8 51.7±4.4 55.5±3.8 52.9±2.8 55.0±3.9 58.7±3.3 50.5±2.8 Yield by treatment (bushels/acre) 49.9±3.3 59.1±4.4 56.2±4.4 61.0±3.4 55.4±3.9 56.2±5.4 56.9±3.4 56.8±4.6 66.1±3.0+ Untreated Fungicide Fungicide 57.3±3.1 64.8±3.0 55.9±3.5 Insecticide 50.0±3.5 63.4±2.2 62.2±3.1 58.0±2.5 61.8±3.8 55.6±1.4 63.8±3.0 57.3±3.0 64.4±2.1 54.6±1.8 66.5±2.5 50.4±1.9 66.1±3.7 54.6±3.1
Average:81.6±1.5 62.1 84.5±1.9 83.2±1.3 82.9±2.0 84.4±1.2 84.0±1.4 82.3±1.3 70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6 73.6±1.1
55.1±3.1 62.8±4.0 64.2±5.3 57.3±2.6 54.1±10.1 58.3±2.6 66.7±1.4 57.6±2.7 67.1±1.7 53.9±0.9 67.8±2.7 54.6±2.4 69.0±2.5 53.1±1.8
57.1±6.2 59.7±2.0 66.0±2.7 58.0±1.7 69.9±3.0 53.5±1.7 67.4±2.5 55.5±2.6 65.9±3.2 56.7±2.7 70.3±2.0 53.7±2.6 67.8±1.3 54.5±1.8
80.1±1.2 82.6±1.2 84.0±1.0 82.7±1.4 81.9±1.8 82.1±1.2 83.2±0.9
79.9±1.0 81.5±1.8 83.9±1.7 83.7±1.5 82.0±1.3 82.2±1.8 84.2±1.6
63.4
66.3
73.9±2.3 70.8±3.6 69.6±1.9 71.6±2.5 75.0±2.9 72.7±2.0 75.4±1.4 68.5±2.8 73.8±1.5 w71.2±1.0 w w. i G r o72.2±1.6 w. o r g ® 75.1±1.1
62.9±1.2 60.4±3.6 62.7±4.0 59.9±3.3 61.1±4.7 59.4±4.0 56.8±3.1 65.5±2.0 63.9±2.3 Yield by treatment (bushels/acre) 64.1±2.1 64.8±2.5 62.7±1.0 61.0±3.4 61.3±3.9 64.9±2.2 59.6±3.7 65.3±2.1 62.9±3.6 + Untreated Fungicide Fungicide 60.3±4.5 65.5±3.6 59.8±4.1 Insecticide 58.7±1.4 70.4±2.3 50.5±9.1 67.8±1.3 61.3±1.5 69.6±1.7 56.4±3.9 67.9±0.6 57.1±1.0 70.2±2.3 56.7±0.9 69.5±0.9 59.0±1.3 67.4±1.9
58.1±2.0 69.7±1.6 55.8±2.3 71.5±1.4 58.2±1.5 70.1±1.3 59.0±1.1 71.2±1.1 57.0±1.5 69.7±1.4 56.7±1.6 70.5±1.0 58.6±1.1 70.7±1.8
56.3±1.6 70.7±1.0 59.1±1.3 69.6±0.7 57.1±1.2 68.8±1.3 61.3±1.5 69.8±2.5 60.2±1.5 68.7±1.7 60.1±1.5 69.3±2.0 62.3±0.7 68.7±2.0
Average:64.9±1.3 57.1 67.1±1.0
64.3±1.8 71.0±1.0 65.3±0.8 68.5±0.9 66.6±0.9 70.2±1.0 68.1±1.2
68.7±1.2 68.0±1.4 66.5±0.5 68.4±0.8 66.6±1.7 67.0±0.8 66.4±0.7
69.5±0.8 68.8±1.8 67.6±1.1 67.5±1.0 67.2±1.9
57.6
59.5
51.2±2.4 48.5±2.3 46.1±1.0 54.3±2.1 55.8±1.5 50.1±1.7 52.1±1.3 55.9±1.4 51.8±1.2 56.7±1.6 57.2±1.1 56.5±0.9 58.8±3.3 56.7±2.9 54.8±1.2 © 2015 South Dakota Regents 58.2±2.0 57.4±0.8Board of 58.8±1.0
Conclusions • Higher planting populations result in larger amounts of lost seed – Also doesn’t result in consistent increased yield
• Yield increases from seed treatments do occur, but are location dependent • Many factors probably influencing this w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
Take-away • For South Dakota, early season aboveground insects and diseases are likely driving the observed yield improvements due to seed treatments. However, current recommendations don’t address this and need to be reconfigured to the regional level within the state.
w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
Acknowledgements • Funding
• Staff and Students – Philip Rozeboom – Cole Dierks – Nathan Braun w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
Acknowledgements • Funding
• Staff and Students – Philip Rozeboom – Cole Dierks – Nathan Braun w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
Adam Varenhorst Assistant Professor & Extension Field Crop Entomologist Brady Hauswedell Graduate Student
w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
About me • From Northwest Iowa – Grew up on family’s farm – Early interest in IPM and insects
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© 2015 South Dakota Board of Regents
Seed treatment debate • 2014: EPA determined $0.00 benefit
w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
Seed treatment debate • AgInformatics, LLC re-analyzed the data and found a 2.8%/acre yield benefit
w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
So, which is it? • $0.00 or 2.8% increase (~1.2 bu/acre) – Current prices that’s $11.45/acre – Estimated insecticide seed treatment ~$9
• More importantly, what’s causing it?
w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
Current recommendations • Fields transitioning from pasture, CRP or other grassland • Fields with recently incorporated manure, cover crops or weeds
• Food grade soybean or seed production
w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
Insect pests being managed?
Matt Montgomery
Bean leaf beetle
Soybean aphids
T. Hillyer
White grubs
Seedcorn maggots w w w. i G r o w. o r g ®
Grape colaspis beetle
Frank Peairs
Wireworms
© 2015 South Dakota Board of Regents
Insect pests being managed?
Matt Montgomery
Bean leaf beetle
Grape colaspis beetle
T. Hillyer
White grubs
Seedcorn maggots w w w. i G r o w. o r g ®
Frank Peairs
Wireworms
© 2015 South Dakota Board of Regents
Shortfalls of current recommendations • What about: – Effect of planting date – Effect of plant populations • Other states suggesting 80-120,000k seeds/A
– Regional effects within a state – Anticipated early season pest pressure
w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
So what’s the problem?
• Call for the reduction of insecticide seed treatments in soybean, but current recommendations fall short
w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
What do we need to know?
• What’s responsible for the 2.8% yield increase associated with the use of insecticide seed treatments in soybean?
w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
Study objective • Evaluate the impact of: – Location within Eastern South Dakota – Planting date – Seeding rate
– Seed treatment Philip Rozeboom
w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
Experimental design • Conducted at four SDSU Research Farms – Southeast Farm – Volga Farm – Brookings Farm – Northeast Farm
• Commercial soybean varieties – Maturity varied from 1.3-2.2 based on location
w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
Experimental design • At each location: – Planting Date • Early (May) • Late (June)
– Seven seeding rates • 60k, 80k, 100k, 120k, 140k, 160k, 180k
– Three seed treatments • Untreated control • Fungicide (EverGol Energy SB) • Insecticide + Fungicide (Poncho + EverGol Energy SB) w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
Experimental design • Soil samples – Emergence, 14d and 28d post-emergence
• Stand counts – Collected at 14d post emergence
• Yield – Collected from middle two rows of each plot
w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
So what did we find belowground? • 15,498 organisms identified – Mainly detritivores
• Top pests: – Wireworms - 63 – White grubs - 16
w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
2016 stand counts: Northeast Farm Early
Late
Planting Population
Untreated
Fungicide
Fungicide+ Insecticide
Untreated
Fungicide
Fungicide+ Insecticide
60k
54,740b
61,565a
64,759a
52,998
44,722
55,321
80k
73,907b
81,167a
80,876a
57,209
62,581
56,773
100k
82,474b
94,961a
102,366a
63,162
69,551
72,600
120k
98,300b
109,045ab
115,289a
81,167
77,682
78,263
140k
108,610b
121,097ab
123,420a
86,423
93,364
95,396
160k
117,176b
130,680a
142,441a
99,840
98,446
96,994
180k
125,598b
151,444a
147,959a
108,900
107,738
105,560
w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
2016 stand counts: Volga Farm Early
Late
Planting Population
Untreated
Fungicide
Fungicide+ Insecticide
Untreated
Fungicide
Fungicide+ Insecticide
60k
71,874
65,340
66,792
55,902
57,935
65,485
80k
82,038
88,282
84,361
71,148
76,666
84,071
100k
101,640
104,399
105,706
87,265
94,235
89,153
120k
119,354
117,902
128,066
111,804
114,476
113,111
140k
138,085ab
128,647b
144,764a
116,886
124,291
122,694
160k
148,249b
145,636b
166,544a
126,324c
145,636b
164,076a
180k
170,174
174,821
163,495
142,006b
187,018a
159,720ab
w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
2016 stand counts: Brookings Farm Early
Late
Planting Population
Untreated
Fungicide
Fungicide+ Insecticide
Untreated
Fungicide
Fungicide+ Insecticide
60k
64,643
76,666
79,453
65,630b
75,940ab
78,698a
80k
74,923
89,908
91,912
80,847b
107,593b
82,764b
100k
93,073
116,886
99,462
90,605b
114,998a
98,446b
120k
115,216
93,073
123,362
98,736
116,741
111,165
140k
114,853
139,392
117,612
115,289b
134,862a
99,317c
160k
138,521
151,937
127,921
116,305ab
146,884a
116,596b
180k
133,148
164,003
169,158
130,825b
149,846a
130,970b
w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
2016 Early stand counts: Southeast Early
Late
Planting Population
Untreated
Fungicide
Fungicide+ Insecticide
Untreated
Fungicide
Fungicide+ Insecticide
60k
53,869
49,513
54,305
65,485
70,567
66,066
80k
64,759ab
60,403b
73,181a
71,293
74,633
71,148
100k
81,312
76,811
73,326
80,731
81,602
78,118
120k
95,977a
80,731b
88,717ab
82,764
87,410
84,797
140k
95,687
99,172
93,944
80,296
85,668
84,071
160k
105,270
104,544
116,305
86,684
92,783
87,846
180k
116,886
111,514
128,502
88,572
90,895
93,073
w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
2017 stand counts: Northeast Farm Early
Late
Planting Population
Untreated
Fungicide
Fungicide+ Insecticide
Untreated
Fungicide
Fungicide+ Insecticide
60k
43,908b
53,579ab
61,129a
52,998
44,722
55,321
80k
64,817
71,003
66,937
57,209
62,581
56,773
100k
75,068
71,787
77,537
63,162
69,551
72,600
120k
81,167
91,040
86,830
81,167
77,682
78,263
140k
89,908
97,574
99,172
86,423
93,364
95,396
160k
96,413b
110,642a
106,722ab
99,840
98,446
96,994
180k
100,362b
115,347a
127,718a
108,900
107,738
105,560
w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
2017 stand counts: Volga Farm Early
Late
Planting Population
Untreated
Fungicide
Fungicide+ Insecticide
Untreated
Fungicide
Fungicide+ Insecticide
60k
48,932b
56,483ab
60,258a
50,820
45,302
49,368
80k
65,921
69,406
67,954
58,080
64,614
69,696
100k
77,101
75,068
83,345
75,794
74,778
72,455
120k
85,378
91,331
94,380
81,893
83,635
85,958
140k
99,172
100,188
109,771
87,410
82,909
95,396
160k
116,450
117,902
124,001
100,624
95,542
108,029
180k
124,582
125,598
125,743
107,738
98,300
117,467
w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
2017 stand counts: Brookings Farm Early
Late
Planting Population
Untreated
Fungicide
Fungicide+ Insecticide
Untreated
Fungicide
Fungicide+ Insecticide
60k
52,127
52,998
70,858
62,146
75,940
61,202
80k
61,565b
64,469ab
70,858a
80,586
82,619
80,499
100k
71,148
75,940
70,858
78,989
87,120
99,535
120k
82,909b
84,797ab
70,858a
81,022b
108,203a
92,347ab
140k
92,057
104,254
70,858
83,287
106,809
97,749
160k
104,254
116,596
70,858
127,849
94,380
103,847
180k
117,902
117,757
70,858
103,673
113,692
103,847
w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
2017 stand counts: Southeast Farm Early
Late
Planting Population
Untreated
Fungicide
Fungicide+ Insecticide
Untreated
Fungicide
Fungicide+ Insecticide
60k
38,333b
48,061a
45,651a
54,450
56,192
59,242
80k
46,319b
58,516a
55,031ab
60,839b
67,954ab
70,858a
100k
64,295
56,802
57,209
80,150
83,345
86,394
120k
59,387
64,178
67,228
102,947
107,158
105,996
140k
72,455
75,794
75,068
108,900b
115,724a
116,015a
160k
69,696b
87,410a
88,136a
132,132
126,469
136,924
180k
86,830b
101,930a
102,221a
142,006
143,893
155,654
w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
2016 Yield Year1/ Location2
2016a South Shorec
Volgaa
Brookingsc
Beresfordb
2017b South Shorea
Planting date3/ Seeding Rate (thousands)4
Mayb 60 80 100 120 140 160 180 Maya 60b 80a 100a 120a 140a 160a 180a Maya 60ab 80ab 100a 120a 140a 160a 180a Maya 60 80 100 120 140 160 180 Maya 60d 80c 100b
Yield by treatment (bushels/acre)
Untreated
Fungicide
Fungicide + Insecticide
63.4±2.2 58.0±2.5 55.6±1.4 57.3±3.0 54.6±1.8 50.4±1.9 54.6±3.1
62.8±4.0 57.3±2.6 58.3±2.6 57.6±2.7 53.9±0.9 54.6±2.4 53.1±1.8
59.7±2.0 58.0±1.7 53.5±1.7 55.5±2.6 56.7±2.7 53.7±2.6 54.5±1.8
81.6±1.5 84.5±1.9 83.2±1.3 82.9±2.0 84.4±1.2 84.0±1.4 82.3±1.3
80.1±1.2 82.6±1.2 84.0±1.0 82.7±1.4 81.9±1.8 82.1±1.2 83.2±0.9
79.9±1.0 81.5±1.8 83.9±1.7 83.7±1.5 82.0±1.3 82.2±1.8 84.2±1.6
70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6 73.6±1.1 74.5±1.0
73.9±2.3 69.6±1.9 75.0±2.9 75.4±1.4 73.8±1.5 71.2±1.0 75.5±1.6
70.8±3.6 71.6±2.5 72.7±2.0 68.5±2.8 72.2±1.6 75.1±1.1 73.3±1.7
74.3±1.5 72.9±1.8 69.2±1.3 69.4±2.4 72.7±2.2 73.2±1.3 73.1±1.3
73.7±1.6 73.2±1.2 72.3±0.8 74.8±2.2 73.4±1.3 71.3±1.3 74.6±1.8
76.1±1.4 72.0±1.0 75.6±2.1 71.6±1.3 75.7±1.3 71.7±1.0 73.5±2.1
66.5±1.6 64.6±2.4 71.6±1.6
65.2±1.6 69.6±1.5 72.4±1.8
68.3±0.9 74.6±1.3 73.3±1.2
w w w. i G r o w. o r g ®
Planting date3/ Seeding Rate (thousands)4
Junea 60 80 100 120 140 160 180 Juneb 60b 80b 100a 120ab 140a 160ab 180ab Juneb 60 80 100 120 140 160 180 Juneb 60b 80ab 100a 120ab 140a 160a 180a Juneb 60d 80c 100b
Yield by treatment (bushels/acre)
Untreated
Fungicide
Fungicide + Insecticide
70.4±2.3 67.8±1.3 69.6±1.7 67.9±0.6 70.2±2.3 69.5±0.9 67.4±1.9
69.7±1.6 71.5±1.4 70.1±1.3 71.2±1.1 69.7±1.4 70.5±1.0 70.7±1.8
70.7±1.0 69.6±0.7 68.8±1.3 69.8±2.5 68.7±1.7 69.3±2.0 68.7±2.0
64.9±1.3 67.1±1.0 69.5±0.8 68.8±1.8 67.6±1.1 67.5±1.0 67.2±1.9
64.3±1.8 71.0±1.0 65.3±0.8 68.5±0.9 66.6±0.9 70.2±1.0 68.1±1.2
68.7±1.2 68.0±1.4 66.5±0.5 68.4±0.8 66.6±1.7 67.0±0.8 66.4±0.7
51.2±2.4 54.3±2.1 52.1±1.3 56.7±1.6 58.8±3.3 58.2±2.0 59.1±2.0
48.5±2.3 55.8±1.5 55.9±1.4 57.2±1.1 56.7±2.9 57.4±0.8 61.9±1.6
46.1±1.0 50.1±1.7 51.8±1.2 56.5±0.9 54.8±1.2 58.8±1.0 60.9±1.4
59.5±5.2 60.3±3.0 66.0±2.3 60.2±4.1 68.7±3.2 61.8±3.7 68.2±2.2
62.9±1.6 63.7±3.8 67.0±3.2 64.2±2.5 64.8±3.5 68.5±1.7 66.1±2.7
64.2±1.9 66.5±3.8 68.4±2.4 65.9±1.9 69.0±2.3 71.0±2.3 68.5±2.8
50.4±2.6 51.3±1.2 52.7±1.9 61.7±1.4 59.6±2.3 57.9±1.7 62.5±1.7 63.1±1.2 © 201565.0±1.8 South Dakota Board
of Regents
2016 Yield: Northeast Farm
Year1/ Location2
2016a South Shorec
Volgaa
Brookingsc
Planting date3/ Seeding Rate (thousands)4
Mayb 60 80 100 120 140 160 180 Maya 60b 80a 100a 120a 140a 160a 180a Maya 60ab 80ab 100a 120a 140a
Yield by treatment (bushels/acre)
Untreated
Fungicide
Fungicide + Insecticide
63.4±2.2 58.0±2.5 55.6±1.4 57.3±3.0 54.6±1.8 50.4±1.9 54.6±3.1
62.8±4.0 57.3±2.6 58.3±2.6 57.6±2.7 53.9±0.9 54.6±2.4 53.1±1.8
59.7±2.0 58.0±1.7 53.5±1.7 55.5±2.6 56.7±2.7 53.7±2.6 54.5±1.8
Average:81.6±1.5 56.2 84.5±1.9 83.2±1.3 82.9±2.0 84.4±1.2 84.0±1.4 82.3±1.3 70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6
56.8
80.1±1.2 82.6±1.2 84.0±1.0 82.7±1.4 81.9±1.8 82.1±1.2 83.2±0.9
55.9
79.9±1.0 81.5±1.8 83.9±1.7 83.7±1.5 82.0±1.3 82.2±1.8 84.2±1.6
73.9±2.3 70.8±3.6 69.6±1.9 71.6±2.5 75.0±2.9 72.7±2.0 75.4±1.4 68.5±2.8 w73.8±1.5 w w. i G r o72.2±1.6 w. o r g ®
Planting date3/ Seeding Rate (thousands)4
Junea 60 80 100 120 140 160 180 Juneb 60b 80b 100a 120ab 140a 160ab 180ab Juneb 60 80 100 120 140
Yield by treatment (bushels/acre)
Untreated
Fungicide
Fungicide + Insecticide
70.4±2.3 67.8±1.3 69.6±1.7 67.9±0.6 70.2±2.3 69.5±0.9 67.4±1.9
69.7±1.6 71.5±1.4 70.1±1.3 71.2±1.1 69.7±1.4 70.5±1.0 70.7±1.8
70.7±1.0 69.6±0.7 68.8±1.3 69.8±2.5 68.7±1.7 69.3±2.0 68.7±2.0
Average:64.9±1.3 69.0 67.1±1.0 69.5±0.8 68.8±1.8 67.6±1.1 67.5±1.0 67.2±1.9
70.5
64.3±1.8 71.0±1.0 65.3±0.8 68.5±0.9 66.6±0.9 70.2±1.0 68.1±1.2
69.3
68.7±1.2 68.0±1.4 66.5±0.5 68.4±0.8 66.6±1.7 67.0±0.8 66.4±0.7
51.2±2.4 48.5±2.3 46.1±1.0 54.3±2.1 55.8±1.5 50.1±1.7 52.1±1.3 55.9±1.4 51.8±1.2 56.7±1.6 57.2±1.1 56.5±0.9 ©58.8±3.3 2015 South Dakota Board of Regents 56.7±2.9 54.8±1.2
2016 Yield: Northeast Farm
Year1/ Location2
2016a South Shorec
Volgaa
Brookingsc
Planting date3/ Seeding Rate (thousands)4
Mayb 60 80 100 120 140 160 180 Maya 60b 80a 100a 120a 140a 160a 180a Maya 60ab 80ab 100a 120a 140a
Yield by treatment (bushels/acre)
Untreated
Fungicide
Fungicide + Insecticide
63.4±2.2 58.0±2.5 55.6±1.4 57.3±3.0 54.6±1.8 50.4±1.9 54.6±3.1
62.8±4.0 57.3±2.6 58.3±2.6 57.6±2.7 53.9±0.9 54.6±2.4 53.1±1.8
59.7±2.0 58.0±1.7 53.5±1.7 55.5±2.6 56.7±2.7 53.7±2.6 54.5±1.8
Average:81.6±1.5 56.2 84.5±1.9 83.2±1.3 82.9±2.0 84.4±1.2 84.0±1.4 82.3±1.3 70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6
56.8
80.1±1.2 82.6±1.2 84.0±1.0 82.7±1.4 81.9±1.8 82.1±1.2 83.2±0.9
55.9
79.9±1.0 81.5±1.8 83.9±1.7 83.7±1.5 82.0±1.3 82.2±1.8 84.2±1.6
73.9±2.3 70.8±3.6 69.6±1.9 71.6±2.5 75.0±2.9 72.7±2.0 75.4±1.4 68.5±2.8 w73.8±1.5 w w. i G r o72.2±1.6 w. o r g ®
Planting date3/ Seeding Rate (thousands)4
Junea 60 80 100 120 140 160 180 Juneb 60b 80b 100a 120ab 140a 160ab 180ab Juneb 60 80 100 120 140
Yield by treatment (bushels/acre)
Untreated
Fungicide
Fungicide + Insecticide
70.4±2.3 67.8±1.3 69.6±1.7 67.9±0.6 70.2±2.3 69.5±0.9 67.4±1.9
69.7±1.6 71.5±1.4 70.1±1.3 71.2±1.1 69.7±1.4 70.5±1.0 70.7±1.8
70.7±1.0 69.6±0.7 68.8±1.3 69.8±2.5 68.7±1.7 69.3±2.0 68.7±2.0
Average:64.9±1.3 69.0 67.1±1.0 69.5±0.8 68.8±1.8 67.6±1.1 67.5±1.0 67.2±1.9
70.5
64.3±1.8 71.0±1.0 65.3±0.8 68.5±0.9 66.6±0.9 70.2±1.0 68.1±1.2
69.3
68.7±1.2 68.0±1.4 66.5±0.5 68.4±0.8 66.6±1.7 67.0±0.8 66.4±0.7
51.2±2.4 48.5±2.3 46.1±1.0 54.3±2.1 55.8±1.5 50.1±1.7 52.1±1.3 55.9±1.4 51.8±1.2 56.7±1.6 57.2±1.1 56.5±0.9 ©58.8±3.3 2015 South Dakota Board of Regents 56.7±2.9 54.8±1.2
2016 Yield: Northeast Farm
Year1/ Location2
Planting date3/ Seeding Rate (thousands)4
Yield by treatment (bushels/acre)
Untreated 2016a South Shorec
Volgaa
Brookingsc
Mayb 60 80 100 120 140 160 180 Maya 60b 80a 100a 120a 140a 160a 180a Maya 60ab 80ab 100a 120a 140a
63.4±2.2 58.0±2.5 55.6±1.4 57.3±3.0 54.6±1.8 50.4±1.9 54.6±3.1
Average:81.6±1.5 56.2 84.5±1.9 83.2±1.3 82.9±2.0 84.4±1.2 84.0±1.4 82.3±1.3 70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6
Fungicide
62.8±4.0 57.3±2.6 58.3±2.6 57.6±2.7 53.9±0.9 54.6±2.4 53.1±1.8
56.8
80.1±1.2 82.6±1.2 84.0±1.0 82.7±1.4 81.9±1.8 82.1±1.2 83.2±0.9
Planting date3/ Seeding Rate (thousands)4
Fungicide + Insecticide 59.7±2.0 58.0±1.7 53.5±1.7 55.5±2.6 56.7±2.7 53.7±2.6 54.5±1.8
55.9
79.9±1.0 81.5±1.8 83.9±1.7 83.7±1.5 82.0±1.3 82.2±1.8 84.2±1.6
73.9±2.3 70.8±3.6 69.6±1.9 71.6±2.5 75.0±2.9 72.7±2.0 75.4±1.4 68.5±2.8 ® w73.8±1.5 w w. i G r o72.2±1.6 w. o r g
Junea 60 80 100 120 140 160 180 Juneb 60b 80b 100a 120ab 140a 160ab 180ab Juneb 60 80 100 120 140
Yield by treatment (bushels/acre)
Untreated
Fungicide
Fungicide + Insecticide
70.4±2.3 67.8±1.3 69.6±1.7 67.9±0.6 70.2±2.3 69.5±0.9 67.4±1.9
69.7±1.6 71.5±1.4 70.1±1.3 71.2±1.1 69.7±1.4 70.5±1.0 70.7±1.8
70.7±1.0 69.6±0.7 68.8±1.3 69.8±2.5 68.7±1.7 69.3±2.0 68.7±2.0
Average:64.9±1.3 69.0 67.1±1.0 69.5±0.8 68.8±1.8 67.6±1.1 67.5±1.0 67.2±1.9
70.5
64.3±1.8 71.0±1.0 65.3±0.8 68.5±0.9 66.6±0.9 70.2±1.0 68.1±1.2
69.3
68.7±1.2 68.0±1.4 66.5±0.5 68.4±0.8 66.6±1.7 67.0±0.8 66.4±0.7
51.2±2.4 48.5±2.3 46.1±1.0 54.3±2.1 55.8±1.5 50.1±1.7 52.1±1.3 55.9±1.4 51.8±1.2 56.7±1.6 57.2±1.1 56.5±0.9 ©58.8±3.3 2015 South Dakota Board of Regents 56.7±2.9 54.8±1.2
2016 Yield: Volga Farm Year1/ Location2
Planting date3/ Seeding Rate (thousands)4
Yield by treatment (bushels/acre)
Untreated 2016a South Shorec
Year1/ Location2
2016a Volga a c South Shore
Brookings Volgaa c
Beresfordbc Brookings
Mayb 60 80 100date3/ Planting 120 Rate Seeding 4 140 (thousands) 160 180 Maya b 60 60b 80 80a 100 100a 120 120a 140 140a 160 160a 180 180a Maya 60 60ab b 80 ab 80a 100a 120a 140 140a 160 160a a 180 180a May Mayaa 60 60 ab 80 80 ab 100 100a 120a 120 140a 140
Fungicide
Fungicide + Insecticide
63.4±2.2 62.8±4.0 59.7±2.0 58.0±2.5 57.3±2.6 58.0±1.7 55.6±1.4 58.3±2.6 53.5±1.7 Yield by treatment (bushels/acre) 57.3±3.0 57.6±2.7 55.5±2.6 54.6±1.8 53.9±0.9 56.7±2.7 50.4±1.9 54.6±2.4 53.7±2.6 + Untreated Fungicide Fungicide 54.6±3.1 53.1±1.8 54.5±1.8 Insecticide 81.6±1.5 63.4±2.2 84.5±1.9 58.0±2.5 83.2±1.3 55.6±1.4 82.9±2.0 57.3±3.0 84.4±1.2 54.6±1.8 84.0±1.4 50.4±1.9 82.3±1.3 54.6±3.1
80.1±1.2 62.8±4.0 82.6±1.2 57.3±2.6 84.0±1.0 58.3±2.6 82.7±1.4 57.6±2.7 81.9±1.8 53.9±0.9 82.1±1.2 54.6±2.4 83.2±0.9 53.1±1.8
79.9±1.0 59.7±2.0 81.5±1.8 58.0±1.7 83.9±1.7 53.5±1.7 83.7±1.5 55.5±2.6 82.0±1.3 56.7±2.7 82.2±1.8 53.7±2.6 84.2±1.6 54.5±1.8
Average:70.4±2.5 83.3 81.6±1.5
73.9±2.3 80.1±1.2 69.6±1.9 82.6±1.2 75.0±2.9 84.0±1.0 75.4±1.4 82.7±1.4 73.8±1.5 81.9±1.8 71.2±1.0 82.1±1.2 75.5±1.6 83.2±0.9
82.4
70.8±3.6 79.9±1.0 71.6±2.5 81.5±1.8 72.7±2.0 83.9±1.7 68.5±2.8 83.7±1.5 72.2±1.6 82.0±1.3 75.1±1.1 82.2±1.8 73.3±1.7 84.2±1.6
70.1±1.0 84.5±1.9 73.8±2.2 83.2±1.3 76.2±0.4 82.9±2.0 73.1±1.6 84.4±1.2 73.6±1.1 84.0±1.4 74.5±1.0 82.3±1.3 74.3±1.5 70.4±2.5 72.9±1.8 70.1±1.0 69.2±1.3 73.8±2.2 69.4±2.4 76.2±0.4 72.7±2.2 73.1±1.6
Planting date3/ Seeding Rate (thousands)4
82.5
73.7±1.6 76.1±1.4 73.9±2.3 70.8±3.6 73.2±1.2 72.0±1.0 69.6±1.9 71.6±2.5 72.3±0.8 75.6±2.1 75.0±2.9 72.7±2.0 74.8±2.2 71.6±1.3 75.4±1.4 68.5±2.8 w73.4±1.3 w w. i G r o75.7±1.3 w. o r g ® 73.8±1.5 72.2±1.6
Yield by treatment (bushels/acre)
Untreated Junea 60 80 100date3/ Planting 120 Rate Seeding 4 140 (thousands) 160 180 Juneba 60 60b 80 80b 100 100a 120 ab 120 140 140a 160 ab 160 180 ab 180 Juneb 60b 60 80b 80 100 100a 120 120 ab 140a 140 160 160 ab 180 180 ab June Junebb 60 60b 80 ab 80 100 100a 120 ab 120 140 140a
Fungicide
Fungicide + Insecticide
70.4±2.3 69.7±1.6 70.7±1.0 67.8±1.3 71.5±1.4 69.6±0.7 69.6±1.7 70.1±1.3 68.8±1.3 Yield by treatment (bushels/acre) 67.9±0.6 71.2±1.1 69.8±2.5 70.2±2.3 69.7±1.4 68.7±1.7 69.5±0.9 70.5±1.0 69.3±2.0 + Untreated Fungicide Fungicide 67.4±1.9 70.7±1.8 68.7±2.0 Insecticide 64.9±1.3 70.4±2.3 67.1±1.0 67.8±1.3 69.5±0.8 69.6±1.7 68.8±1.8 67.9±0.6 67.6±1.1 70.2±2.3 67.5±1.0 69.5±0.9 67.2±1.9 67.4±1.9
Average:51.2±2.4 67.5 64.9±1.3 54.3±2.1 67.1±1.0 52.1±1.3 69.5±0.8 56.7±1.6 68.8±1.8 58.8±3.3 67.6±1.1 58.2±2.0 67.5±1.0 59.1±2.0 67.2±1.9
64.3±1.8 69.7±1.6 71.0±1.0 71.5±1.4 65.3±0.8 70.1±1.3 68.5±0.9 71.2±1.1 66.6±0.9 69.7±1.4 70.2±1.0 70.5±1.0 68.1±1.2 70.7±1.8
67.7
48.5±2.3 64.3±1.8 55.8±1.5 71.0±1.0 55.9±1.4 65.3±0.8 57.2±1.1 68.5±0.9 56.7±2.9 66.6±0.9 57.4±0.8 70.2±1.0 61.9±1.6 68.1±1.2
68.7±1.2 70.7±1.0 68.0±1.4 69.6±0.7 66.5±0.5 68.8±1.3 68.4±0.8 69.8±2.5 66.6±1.7 68.7±1.7 67.0±0.8 69.3±2.0 66.4±0.7 68.7±2.0
67.4
46.1±1.0 68.7±1.2 50.1±1.7 68.0±1.4 51.8±1.2 66.5±0.5 56.5±0.9 68.4±0.8 54.8±1.2 66.6±1.7 58.8±1.0 67.0±0.8 60.9±1.4 66.4±0.7
59.5±5.2 62.9±1.6 64.2±1.9 51.2±2.4 48.5±2.3 46.1±1.0 60.3±3.0 63.7±3.8 66.5±3.8 54.3±2.1 55.8±1.5 50.1±1.7 66.0±2.3 67.0±3.2 68.4±2.4 52.1±1.3 55.9±1.4 51.8±1.2 60.2±4.1 64.2±2.5 65.9±1.9 56.7±1.6 57.2±1.1 56.5±0.9 © 2015 South 64.8±3.5 Dakota Board of Regents 68.7±3.2 69.0±2.3 58.8±3.3 56.7±2.9 54.8±1.2
2016 Yield: Volga Farm Year1/ Location2
Planting date3/ Seeding Rate (thousands)4
Yield by treatment (bushels/acre)
Untreated 2016a South Shorec
Year1/ Location2
2016a South Shore Volga a c
Brookings Volgaa c
Beresfordbc Brookings
Mayb 60 80 100 Planting date3/ 120 Rate Seeding 4 140 (thousands) 160 180 Maya b 60b 60 80 80a 100a 100 120 120a 140 140a 160 160a 180 180a Maya 60 60ab b 80 80ab a 100a 120a 140a 160a 180a Maya 60 60 ab 80 80 ab 100a 100 120a 120 140a 140
Fungicide
Fungicide + Insecticide
63.4±2.2 62.8±4.0 59.7±2.0 58.0±2.5 57.3±2.6 58.0±1.7 55.6±1.4 58.3±2.6 53.5±1.7 Yield by treatment (bushels/acre) 57.3±3.0 57.6±2.7 55.5±2.6 54.6±1.8 53.9±0.9 56.7±2.7 50.4±1.9 54.6±2.4 53.7±2.6 + Untreated Fungicide Fungicide Insecticide 54.6±3.1 53.1±1.8 54.5±1.8
63.4±2.2 81.6±1.5 84.5±1.9 58.0±2.5 55.6±1.4 83.2±1.3 82.9±2.0 57.3±3.0 84.4±1.2 54.6±1.8 84.0±1.4 50.4±1.9 82.3±1.3 54.6±3.1
Average:70.4±2.5 83.3 81.6±1.5 70.1±1.0 84.5±1.9 73.8±2.2 83.2±1.3 76.2±0.4 82.9±2.0 73.1±1.6 84.4±1.2 73.6±1.1 84.0±1.4 74.5±1.0 82.3±1.3 74.3±1.5 70.4±2.5 72.9±1.8 70.1±1.0 69.2±1.3 73.8±2.2 69.4±2.4 76.2±0.4 72.7±2.2 73.1±1.6
62.8±4.0 80.1±1.2 82.6±1.2 57.3±2.6 58.3±2.6 84.0±1.0 82.7±1.4 57.6±2.7 81.9±1.8 53.9±0.9 82.1±1.2 54.6±2.4 83.2±0.9 53.1±1.8
82.4
73.9±2.3 80.1±1.2 69.6±1.9 82.6±1.2 75.0±2.9 84.0±1.0 75.4±1.4 82.7±1.4 73.8±1.5 81.9±1.8 71.2±1.0 82.1±1.2 75.5±1.6 83.2±0.9
Planting date3/ Seeding Rate (thousands)4
59.7±2.0 79.9±1.0 81.5±1.8 58.0±1.7 53.5±1.7 83.9±1.7 83.7±1.5 55.5±2.6 82.0±1.3 56.7±2.7 82.2±1.8 53.7±2.6 84.2±1.6 54.5±1.8
82.5
70.8±3.6 79.9±1.0 71.6±2.5 81.5±1.8 72.7±2.0 83.9±1.7 68.5±2.8 83.7±1.5 72.2±1.6 82.0±1.3 75.1±1.1 82.2±1.8 73.3±1.7 84.2±1.6
73.7±1.6 76.1±1.4 73.9±2.3 70.8±3.6 73.2±1.2 72.0±1.0 69.6±1.9 71.6±2.5 72.3±0.8 75.6±2.1 75.0±2.9 72.7±2.0 74.8±2.2 71.6±1.3 75.4±1.4 w w w. i G r o68.5±2.8 w. o r g ® 73.4±1.3 75.7±1.3 73.8±1.5 72.2±1.6
Yield by treatment (bushels/acre)
Untreated Junea 60 80 100 Planting date3/ 120 Rate Seeding 4 140 (thousands) 160 180 Juneba 60b 60 80 80b 100a 100 120 ab 120 140 140a 160 ab 160 180 ab 180 Juneb 60b 60 80b 80 100a 100 120 120 ab 140a 140 160 160 ab 180 180 ab Juneb 60 60b 80 ab 80 100 100a 120 ab 120 140 140a
Fungicide
Fungicide + Insecticide
70.4±2.3 69.7±1.6 70.7±1.0 67.8±1.3 71.5±1.4 69.6±0.7 69.6±1.7 70.1±1.3 68.8±1.3 Yield by treatment (bushels/acre) 67.9±0.6 71.2±1.1 69.8±2.5 70.2±2.3 69.7±1.4 68.7±1.7 69.5±0.9 70.5±1.0 69.3±2.0 + Untreated Fungicide Fungicide Insecticide 67.4±1.9 70.7±1.8 68.7±2.0
70.4±2.3 64.9±1.3 67.1±1.0 67.8±1.3 69.6±1.7 69.5±0.8 68.8±1.8 67.9±0.6 67.6±1.1 70.2±2.3 67.5±1.0 69.5±0.9 67.2±1.9 67.4±1.9
Average:51.2±2.4 67.5 64.9±1.3 54.3±2.1 67.1±1.0 52.1±1.3 69.5±0.8 56.7±1.6 68.8±1.8 58.8±3.3 67.6±1.1 58.2±2.0 67.5±1.0 59.1±2.0 67.2±1.9
69.7±1.6 64.3±1.8 71.0±1.0 71.5±1.4 70.1±1.3 65.3±0.8 68.5±0.9 71.2±1.1 66.6±0.9 69.7±1.4 70.2±1.0 70.5±1.0 68.1±1.2 70.7±1.8
67.7
48.5±2.3 64.3±1.8 55.8±1.5 71.0±1.0 55.9±1.4 65.3±0.8 57.2±1.1 68.5±0.9 56.7±2.9 66.6±0.9 57.4±0.8 70.2±1.0 61.9±1.6 68.1±1.2
70.7±1.0 68.7±1.2 68.0±1.4 69.6±0.7 68.8±1.3 66.5±0.5 68.4±0.8 69.8±2.5 66.6±1.7 68.7±1.7 67.0±0.8 69.3±2.0 66.4±0.7 68.7±2.0
67.4
46.1±1.0 68.7±1.2 50.1±1.7 68.0±1.4 51.8±1.2 66.5±0.5 56.5±0.9 68.4±0.8 54.8±1.2 66.6±1.7 58.8±1.0 67.0±0.8 60.9±1.4 66.4±0.7
59.5±5.2 62.9±1.6 64.2±1.9 51.2±2.4 48.5±2.3 46.1±1.0 60.3±3.0 63.7±3.8 66.5±3.8 54.3±2.1 55.8±1.5 50.1±1.7 66.0±2.3 67.0±3.2 68.4±2.4 52.1±1.3 55.9±1.4 51.8±1.2 60.2±4.1 64.2±2.5 65.9±1.9 56.7±1.6 57.2±1.1 56.5±0.9 © 2015 South Dakota Board of Regents 68.7±3.2 64.8±3.5 69.0±2.3 58.8±3.3 56.7±2.9 54.8±1.2
2016 Yield: Volga Farm Year1/ Location2
Planting date3/ Seeding Rate (thousands)4
Yield by treatment (bushels/acre)
Untreated 2016a South Shorec
Year1/ Location2
2016a Volga a c South Shore
Brookings Volgaa c
Beresfordbc Brookings
Mayb 60 80 100date3/ Planting 120 Rate Seeding 4 140 (thousands) 160 180 Maya b 60 60b 80 80a 100 100a 120 120a 140 140a 160 160a 180 180a Maya 60 60ab b 80 80ab a 100a 120a 140a 160a 180a Maya 60 60 ab 80 80 ab 100 100a 120a 120 140a 140
Fungicide
Fungicide + Insecticide
63.4±2.2 62.8±4.0 59.7±2.0 58.0±2.5 57.3±2.6 58.0±1.7 55.6±1.4 58.3±2.6 53.5±1.7 Yield by treatment (bushels/acre) 57.3±3.0 57.6±2.7 55.5±2.6 54.6±1.8 53.9±0.9 56.7±2.7 50.4±1.9 54.6±2.4 53.7±2.6 + Untreated Fungicide Fungicide 54.6±3.1 53.1±1.8 54.5±1.8 Insecticide 81.6±1.5 63.4±2.2 84.5±1.9 58.0±2.5 83.2±1.3 55.6±1.4 82.9±2.0 57.3±3.0 84.4±1.2 54.6±1.8 84.0±1.4 50.4±1.9 82.3±1.3 54.6±3.1
80.1±1.2 62.8±4.0 82.6±1.2 57.3±2.6 84.0±1.0 58.3±2.6 82.7±1.4 57.6±2.7 81.9±1.8 53.9±0.9 82.1±1.2 54.6±2.4 83.2±0.9 53.1±1.8
79.9±1.0 59.7±2.0 81.5±1.8 58.0±1.7 83.9±1.7 53.5±1.7 83.7±1.5 55.5±2.6 82.0±1.3 56.7±2.7 82.2±1.8 53.7±2.6 84.2±1.6 54.5±1.8
Average:70.4±2.5 83.3 81.6±1.5
73.9±2.3 80.1±1.2 69.6±1.9 82.6±1.2 75.0±2.9 84.0±1.0 75.4±1.4 82.7±1.4 73.8±1.5 81.9±1.8 71.2±1.0 82.1±1.2 75.5±1.6 83.2±0.9
82.4
70.8±3.6 79.9±1.0 71.6±2.5 81.5±1.8 72.7±2.0 83.9±1.7 68.5±2.8 83.7±1.5 72.2±1.6 82.0±1.3 75.1±1.1 82.2±1.8 73.3±1.7 84.2±1.6
70.1±1.0 84.5±1.9 73.8±2.2 83.2±1.3 76.2±0.4 82.9±2.0 73.1±1.6 84.4±1.2 73.6±1.1 84.0±1.4 74.5±1.0 82.3±1.3 74.3±1.5 70.4±2.5 72.9±1.8 70.1±1.0 69.2±1.3 73.8±2.2 69.4±2.4 76.2±0.4 72.7±2.2 73.1±1.6
Planting date3/ Seeding Rate (thousands)4
82.5
73.7±1.6 76.1±1.4 73.9±2.3 70.8±3.6 73.2±1.2 72.0±1.0 69.6±1.9 71.6±2.5 72.3±0.8 75.6±2.1 75.0±2.9 72.7±2.0 74.8±2.2 71.6±1.3 75.4±1.4 68.5±2.8 ® w73.4±1.3 w w. i G r o75.7±1.3 w. o r g 73.8±1.5 72.2±1.6
Yield by treatment (bushels/acre)
Untreated Junea 60 80 100date3/ Planting 120 Rate Seeding 4 140 (thousands) 160 180 Juneba 60 60b 80 80b 100 100a 120 ab 120 140 140a 160 ab 160 180 ab 180 Juneb 60b 60 80b 80 100 100a 120 120 ab 140a 140 160 160 ab 180 180ab Juneb 60 60b 80 ab 80 100 100a 120 ab 120 140 140a
Fungicide
Fungicide + Insecticide
70.4±2.3 69.7±1.6 70.7±1.0 67.8±1.3 71.5±1.4 69.6±0.7 69.6±1.7 70.1±1.3 68.8±1.3 Yield by treatment (bushels/acre) 67.9±0.6 71.2±1.1 69.8±2.5 70.2±2.3 69.7±1.4 68.7±1.7 69.5±0.9 70.5±1.0 69.3±2.0 + Untreated Fungicide Fungicide 67.4±1.9 70.7±1.8 68.7±2.0 Insecticide 64.9±1.3 70.4±2.3 67.1±1.0 67.8±1.3 69.5±0.8 69.6±1.7 68.8±1.8 67.9±0.6 67.6±1.1 70.2±2.3 67.5±1.0 69.5±0.9 67.2±1.9 67.4±1.9
64.3±1.8 69.7±1.6 71.0±1.0 71.5±1.4 65.3±0.8 70.1±1.3 68.5±0.9 71.2±1.1 66.6±0.9 69.7±1.4 70.2±1.0 70.5±1.0 68.1±1.2 70.7±1.8
68.7±1.2 70.7±1.0 68.0±1.4 69.6±0.7 66.5±0.5 68.8±1.3 68.4±0.8 69.8±2.5 66.6±1.7 68.7±1.7 67.0±0.8 69.3±2.0 66.4±0.7 68.7±2.0
Average:51.2±2.4 67.5 64.9±1.3
48.5±2.3 64.3±1.8 55.8±1.5 71.0±1.0 55.9±1.4 65.3±0.8 57.2±1.1 68.5±0.9 56.7±2.9 66.6±0.9 57.4±0.8 70.2±1.0 61.9±1.6 68.1±1.2
67.7
46.1±1.0 68.7±1.2 50.1±1.7 68.0±1.4 51.8±1.2 66.5±0.5 56.5±0.9 68.4±0.8 54.8±1.2 66.6±1.7 58.8±1.0 67.0±0.8 60.9±1.4 66.4±0.7
54.3±2.1 67.1±1.0 52.1±1.3 69.5±0.8 56.7±1.6 68.8±1.8 58.8±3.3 67.6±1.1 58.2±2.0 67.5±1.0 59.1±2.0 67.2±1.9
67.4
59.5±5.2 62.9±1.6 64.2±1.9 51.2±2.4 48.5±2.3 46.1±1.0 60.3±3.0 63.7±3.8 66.5±3.8 54.3±2.1 55.8±1.5 50.1±1.7 66.0±2.3 67.0±3.2 68.4±2.4 52.1±1.3 55.9±1.4 51.8±1.2 60.2±4.1 64.2±2.5 65.9±1.9 56.7±1.6 57.2±1.1 56.5±0.9 © 2015 South 64.8±3.5 Dakota Regents 68.7±3.2 69.0±2.3 58.8±3.3 56.7±2.9Board of 54.8±1.2
(thousands)4
(thousands)4 Untreated
Fungicide
Fungicide + Insecticide
63.4±2.2 58.0±2.5 55.6±1.4 57.3±3.0 54.6±1.8 50.4±1.9 54.6±3.1
62.8±4.0 57.3±2.6 58.3±2.6 57.6±2.7 53.9±0.9 54.6±2.4 53.1±1.8
59.7±2.0 58.0±1.7 53.5±1.7 55.5±2.6 56.7±2.7 53.7±2.6 54.5±1.8
Untreated
Fungicide
Fungicide + Insecticide
70.4±2.3 67.8±1.3 69.6±1.7 67.9±0.6 70.2±2.3 69.5±0.9 67.4±1.9
69.7±1.6 71.5±1.4 70.1±1.3 71.2±1.1 69.7±1.4 70.5±1.0 70.7±1.8
70.7±1.0 69.6±0.7 68.8±1.3 69.8±2.5 68.7±1.7 69.3±2.0 68.7±2.0
2016 Yield: Brookings Farm Farm 2016a South Shorec
Volgaa
Year1/ Location2
2016a Brookings cc South Shore
Beresford Volgaa b
2017b South Shore Brookings ca
Mayb 60 80 100 120 140 160 180 Maya 60b 80a 100 Planting a date3/ 120 a Seeding Rate 4 140a (thousands) 160a 180a Mayab 60 ab 60 80 ab 80 100 100a 120 120a 140 140a 160 160a 180 180a Maya 60b 60 80a 80 100a 100 120a 120 140a 140 160a 160 180a 180 Maya 60ab d 60 80ab c 80 100b a 120 120ab a 140a 160a
81.6±1.5 80.1±1.2 79.9±1.0 84.5±1.9 82.6±1.2 81.5±1.8 83.2±1.3 84.0±1.0 83.9±1.7 Yield by treatment (bushels/acre) 82.9±2.0 82.7±1.4 83.7±1.5 84.4±1.2 81.9±1.8 82.0±1.3 84.0±1.4 82.1±1.2 82.2±1.8 + Untreated Fungicide Fungicide 82.3±1.3 83.2±0.9 84.2±1.6 Insecticide 70.4±2.5 63.4±2.2 70.1±1.0 58.0±2.5 73.8±2.2 55.6±1.4 76.2±0.4 57.3±3.0 73.1±1.6 54.6±1.8 73.6±1.1 50.4±1.9 74.5±1.0 54.6±3.1
73.9±2.3 62.8±4.0 69.6±1.9 57.3±2.6 75.0±2.9 58.3±2.6 75.4±1.4 57.6±2.7 73.8±1.5 53.9±0.9 71.2±1.0 54.6±2.4 75.5±1.6 53.1±1.8
70.8±3.6 59.7±2.0 71.6±2.5 58.0±1.7 72.7±2.0 53.5±1.7 68.5±2.8 55.5±2.6 72.2±1.6 56.7±2.7 75.1±1.1 53.7±2.6 73.3±1.7 54.5±1.8
81.6±1.5 Average:74.3±1.5 73.1
73.7±1.6 80.1±1.2 73.2±1.2 82.6±1.2 72.3±0.8 84.0±1.0 74.8±2.2 82.7±1.4 73.4±1.3 81.9±1.8 71.3±1.3 82.1±1.2 74.6±1.8 83.2±0.9
73.5
76.1±1.4 79.9±1.0 72.0±1.0 81.5±1.8 75.6±2.1 83.9±1.7 71.6±1.3 83.7±1.5 75.7±1.3 82.0±1.3 71.7±1.0 82.2±1.8 73.5±2.1 84.2±1.6
72.9±1.8 84.5±1.9 69.2±1.3 83.2±1.3 69.4±2.4 82.9±2.0 72.7±2.2 84.4±1.2 73.2±1.3 84.0±1.4 73.1±1.3 82.3±1.3 66.5±1.6 70.4±2.5 64.6±2.4 70.1±1.0 71.6±1.6 73.8±2.2 73.7±1.5 76.2±0.4 74.8±1.2 73.1±1.6 76.9±1.2 73.6±1.1
72.0
65.2±1.6 68.3±0.9 73.9±2.3 70.8±3.6 69.6±1.5 74.6±1.3 69.6±1.9 71.6±2.5 72.4±1.8 73.3±1.2 75.0±2.9 72.7±2.0 76.1±1.6 74.7±1.2 75.4±1.4 68.5±2.8 76.9±1.7 75.3±0.7 73.8±1.5 72.2±1.6 w80.0±1.1 w w. i G r o75.4±1.9 w. o r g ® 71.2±1.0 75.1±1.1
Junea 60 80 100 120 140 160 180 Juneb 60b 80b 100 Planting adate3/ 120abRate Seeding 4 140a (thousands) 160ab 180ab June Juneba 60 60 80 80 100 100 120 120 140 140 160 160 180 180 June Junebb 60 60bb 80 80ab b 100 100aa 120 120ab ab 140 140aa 160ab a 160 180ab a 180 June Junebb 60 60d 80 80c 100 100b 120 120b 140 ab 140 160 160a
64.9±1.3 64.3±1.8 68.7±1.2 67.1±1.0 71.0±1.0 68.0±1.4 69.5±0.8 65.3±0.8 66.5±0.5 Yield by treatment (bushels/acre) 68.8±1.8 68.5±0.9 68.4±0.8 67.6±1.1 66.6±0.9 66.6±1.7 67.5±1.0 70.2±1.0 67.0±0.8 + Untreated Fungicide Fungicide 67.2±1.9 68.1±1.2 66.4±0.7 Insecticide 51.2±2.4 70.4±2.3 54.3±2.1 67.8±1.3 52.1±1.3 69.6±1.7 56.7±1.6 67.9±0.6 58.8±3.3 70.2±2.3 58.2±2.0 69.5±0.9 59.1±2.0 67.4±1.9
48.5±2.3 69.7±1.6 55.8±1.5 71.5±1.4 55.9±1.4 70.1±1.3 57.2±1.1 71.2±1.1 56.7±2.9 69.7±1.4 57.4±0.8 70.5±1.0 61.9±1.6 70.7±1.8
46.1±1.0 70.7±1.0 50.1±1.7 69.6±0.7 51.8±1.2 68.8±1.3 56.5±0.9 69.8±2.5 54.8±1.2 68.7±1.7 58.8±1.0 69.3±2.0 60.9±1.4 68.7±2.0
64.9±1.3 Average:59.5±5.2 55.8
62.9±1.6 64.3±1.8 56.2
64.2±1.9 68.7±1.2 66.5±3.8 68.0±1.4 68.4±2.4 66.5±0.5 65.9±1.9 68.4±0.8 69.0±2.3 66.6±1.7 71.0±2.3 67.0±0.8 68.5±2.8 66.4±0.7
60.3±3.0 67.1±1.0 66.0±2.3 69.5±0.8 60.2±4.1 68.8±1.8 68.7±3.2 67.6±1.1 61.8±3.7 67.5±1.0 68.2±2.2 67.2±1.9
63.7±3.8 71.0±1.0 67.0±3.2 65.3±0.8 64.2±2.5 68.5±0.9 64.8±3.5 66.6±0.9 68.5±1.7 70.2±1.0 66.1±2.7 68.1±1.2
54.1
50.4±2.6 51.3±1.2 52.7±1.9 51.2±2.4 48.5±2.3 46.1±1.0 61.7±1.4 59.6±2.3 57.9±1.7 54.3±2.1 55.8±1.5 50.1±1.7 62.5±1.7 65.0±1.8 63.1±1.2 52.1±1.3 55.9±1.4 51.8±1.2 64.0±1.9 67.3±1.9 64.1±0.8 56.7±1.6 57.2±1.1 56.5±0.9 65.4±2.1 67.3±1.4 65.4±1.6 58.8±3.3 56.7±2.9 54.8±1.2 © 2015 South 68.2±1.0 Dakota Board of Regents 69.8±1.2 67.6±1.0 58.2±2.0 57.4±0.8 58.8±1.0
(thousands)4
(thousands)4 Untreated
Fungicide
Fungicide + Insecticide
63.4±2.2 58.0±2.5 55.6±1.4 57.3±3.0 54.6±1.8 50.4±1.9 54.6±3.1
62.8±4.0 57.3±2.6 58.3±2.6 57.6±2.7 53.9±0.9 54.6±2.4 53.1±1.8
59.7±2.0 58.0±1.7 53.5±1.7 55.5±2.6 56.7±2.7 53.7±2.6 54.5±1.8
Untreated
Fungicide
Fungicide + Insecticide
70.4±2.3 67.8±1.3 69.6±1.7 67.9±0.6 70.2±2.3 69.5±0.9 67.4±1.9
69.7±1.6 71.5±1.4 70.1±1.3 71.2±1.1 69.7±1.4 70.5±1.0 70.7±1.8
70.7±1.0 69.6±0.7 68.8±1.3 69.8±2.5 68.7±1.7 69.3±2.0 68.7±2.0
2016 Yield: Brookings Farm Farm 2016a South Shorec
Volgaa
Year1/ Location2
2016a Brookings cc South Shore
Beresford Volgaa b
2017b South Shore Brookings ca
Mayb 60 80 100 120 140 160 180 Maya 60b 80a 100 Planting a date3/ 120 a Seeding Rate 4 140a (thousands) 160a 180a Mayab 60 ab 60 80 ab 80 100 100a 120 120a 140 140a 160 160a 180 180a Maya 60b 60 80a 80 100a 100 120a 120 140a 140 160a 160 180a 180 Maya 60ab d 60 80ab c 80 100b a 120 120ab a 140a 160a
81.6±1.5 80.1±1.2 79.9±1.0 84.5±1.9 82.6±1.2 81.5±1.8 83.2±1.3 84.0±1.0 83.9±1.7 Yield by treatment (bushels/acre) 82.9±2.0 82.7±1.4 83.7±1.5 84.4±1.2 81.9±1.8 82.0±1.3 84.0±1.4 82.1±1.2 82.2±1.8 + Untreated Fungicide Fungicide 82.3±1.3 83.2±0.9 84.2±1.6 Insecticide 70.4±2.5 63.4±2.2 70.1±1.0 58.0±2.5 73.8±2.2 55.6±1.4 76.2±0.4 57.3±3.0 73.1±1.6 54.6±1.8 73.6±1.1 50.4±1.9 74.5±1.0 54.6±3.1
73.9±2.3 62.8±4.0 69.6±1.9 57.3±2.6 75.0±2.9 58.3±2.6 75.4±1.4 57.6±2.7 73.8±1.5 53.9±0.9 71.2±1.0 54.6±2.4 75.5±1.6 53.1±1.8
70.8±3.6 59.7±2.0 71.6±2.5 58.0±1.7 72.7±2.0 53.5±1.7 68.5±2.8 55.5±2.6 72.2±1.6 56.7±2.7 75.1±1.1 53.7±2.6 73.3±1.7 54.5±1.8
81.6±1.5 Average:74.3±1.5 73.1
73.7±1.6 80.1±1.2 73.2±1.2 82.6±1.2 72.3±0.8 84.0±1.0 74.8±2.2 82.7±1.4 73.4±1.3 81.9±1.8 71.3±1.3 82.1±1.2 74.6±1.8 83.2±0.9
73.5
76.1±1.4 79.9±1.0 72.0±1.0 81.5±1.8 75.6±2.1 83.9±1.7 71.6±1.3 83.7±1.5 75.7±1.3 82.0±1.3 71.7±1.0 82.2±1.8 73.5±2.1 84.2±1.6
72.9±1.8 84.5±1.9 69.2±1.3 83.2±1.3 69.4±2.4 82.9±2.0 72.7±2.2 84.4±1.2 73.2±1.3 84.0±1.4 73.1±1.3 82.3±1.3 66.5±1.6 70.4±2.5 64.6±2.4 70.1±1.0 71.6±1.6 73.8±2.2 73.7±1.5 76.2±0.4 74.8±1.2 73.1±1.6 76.9±1.2 73.6±1.1
72.0
65.2±1.6 68.3±0.9 73.9±2.3 70.8±3.6 69.6±1.5 74.6±1.3 69.6±1.9 71.6±2.5 72.4±1.8 73.3±1.2 75.0±2.9 72.7±2.0 76.1±1.6 74.7±1.2 75.4±1.4 68.5±2.8 76.9±1.7 75.3±0.7 73.8±1.5 72.2±1.6 w80.0±1.1 w w. i G r o75.4±1.9 w. o r g ® 71.2±1.0 75.1±1.1
Junea 60 80 100 120 140 160 180 Juneb 60b 80b 100 Planting adate3/ 120abRate Seeding 4 140a (thousands) 160ab 180ab June Juneba 60 60 80 80 100 100 120 120 140 140 160 160 180 180 June Junebb 60 60bb 80 80ab b 100 100aa 120 120ab ab 140 140aa 160ab a 160 180ab a 180 June Junebb 60 60d 80 80c 100 100b 120 120b 140 ab 140 160 160a
64.9±1.3 64.3±1.8 68.7±1.2 67.1±1.0 71.0±1.0 68.0±1.4 69.5±0.8 65.3±0.8 66.5±0.5 Yield by treatment (bushels/acre) 68.8±1.8 68.5±0.9 68.4±0.8 67.6±1.1 66.6±0.9 66.6±1.7 67.5±1.0 70.2±1.0 67.0±0.8 + Untreated Fungicide Fungicide 67.2±1.9 68.1±1.2 66.4±0.7 Insecticide 51.2±2.4 70.4±2.3 54.3±2.1 67.8±1.3 52.1±1.3 69.6±1.7 56.7±1.6 67.9±0.6 58.8±3.3 70.2±2.3 58.2±2.0 69.5±0.9 59.1±2.0 67.4±1.9
48.5±2.3 69.7±1.6 55.8±1.5 71.5±1.4 55.9±1.4 70.1±1.3 57.2±1.1 71.2±1.1 56.7±2.9 69.7±1.4 57.4±0.8 70.5±1.0 61.9±1.6 70.7±1.8
46.1±1.0 70.7±1.0 50.1±1.7 69.6±0.7 51.8±1.2 68.8±1.3 56.5±0.9 69.8±2.5 54.8±1.2 68.7±1.7 58.8±1.0 69.3±2.0 60.9±1.4 68.7±2.0
64.9±1.3 Average:59.5±5.2 55.8
62.9±1.6 64.3±1.8 56.2
64.2±1.9 68.7±1.2 66.5±3.8 68.0±1.4 68.4±2.4 66.5±0.5 65.9±1.9 68.4±0.8 69.0±2.3 66.6±1.7 71.0±2.3 67.0±0.8 68.5±2.8 66.4±0.7
60.3±3.0 67.1±1.0 66.0±2.3 69.5±0.8 60.2±4.1 68.8±1.8 68.7±3.2 67.6±1.1 61.8±3.7 67.5±1.0 68.2±2.2 67.2±1.9
63.7±3.8 71.0±1.0 67.0±3.2 65.3±0.8 64.2±2.5 68.5±0.9 64.8±3.5 66.6±0.9 68.5±1.7 70.2±1.0 66.1±2.7 68.1±1.2
54.1
50.4±2.6 51.3±1.2 52.7±1.9 51.2±2.4 48.5±2.3 46.1±1.0 61.7±1.4 59.6±2.3 57.9±1.7 54.3±2.1 55.8±1.5 50.1±1.7 62.5±1.7 65.0±1.8 63.1±1.2 52.1±1.3 55.9±1.4 51.8±1.2 64.0±1.9 67.3±1.9 64.1±0.8 56.7±1.6 57.2±1.1 56.5±0.9 65.4±2.1 67.3±1.4 65.4±1.6 58.8±3.3 56.7±2.9 54.8±1.2 © 2015 South 68.2±1.0 Dakota Board of Regents 69.8±1.2 67.6±1.0 58.2±2.0 57.4±0.8 58.8±1.0
(thousands)4
(thousands)4 Untreated
Fungicide
Fungicide + Insecticide
63.4±2.2 58.0±2.5 55.6±1.4 57.3±3.0 54.6±1.8 50.4±1.9 54.6±3.1
62.8±4.0 57.3±2.6 58.3±2.6 57.6±2.7 53.9±0.9 54.6±2.4 53.1±1.8
59.7±2.0 58.0±1.7 53.5±1.7 55.5±2.6 56.7±2.7 53.7±2.6 54.5±1.8
Untreated
Fungicide
Fungicide + Insecticide
70.4±2.3 67.8±1.3 69.6±1.7 67.9±0.6 70.2±2.3 69.5±0.9 67.4±1.9
69.7±1.6 71.5±1.4 70.1±1.3 71.2±1.1 69.7±1.4 70.5±1.0 70.7±1.8
70.7±1.0 69.6±0.7 68.8±1.3 69.8±2.5 68.7±1.7 69.3±2.0 68.7±2.0
2016 Yield: Brookings Farm Farm 2016a South Shorec
Volgaa
Year1/ Location2
2016a Brookings cc South Shore
Beresford Volgaa b
2017b South Shore Brookings ca
Mayb 60 80 100 120 140 160 180 Maya 60b 80a 100 Planting a date3/ 120 a Seeding Rate 4 140a (thousands) 160a 180a Mayab 60 ab 60 80 ab 80 100 100a 120 120a 140 140a 160 160a 180 180a Maya 60b 60 80a 80 100a 100 120a 120 140a 140 160a 160 180a 180 Maya 60ab d 60 80ab c 80 100b a 120 120ab a 140a 160a
81.6±1.5 80.1±1.2 79.9±1.0 84.5±1.9 82.6±1.2 81.5±1.8 83.2±1.3 84.0±1.0 83.9±1.7 Yield by treatment (bushels/acre) 82.9±2.0 82.7±1.4 83.7±1.5 84.4±1.2 81.9±1.8 82.0±1.3 84.0±1.4 82.1±1.2 82.2±1.8 + Untreated Fungicide Fungicide 82.3±1.3 83.2±0.9 84.2±1.6 Insecticide 70.4±2.5 63.4±2.2 70.1±1.0 58.0±2.5 73.8±2.2 55.6±1.4 76.2±0.4 57.3±3.0 73.1±1.6 54.6±1.8 73.6±1.1 50.4±1.9 74.5±1.0 54.6±3.1
73.9±2.3 62.8±4.0 69.6±1.9 57.3±2.6 75.0±2.9 58.3±2.6 75.4±1.4 57.6±2.7 73.8±1.5 53.9±0.9 71.2±1.0 54.6±2.4 75.5±1.6 53.1±1.8
70.8±3.6 59.7±2.0 71.6±2.5 58.0±1.7 72.7±2.0 53.5±1.7 68.5±2.8 55.5±2.6 72.2±1.6 56.7±2.7 75.1±1.1 53.7±2.6 73.3±1.7 54.5±1.8
81.6±1.5 Average:74.3±1.5 73.1
73.7±1.6 80.1±1.2 73.2±1.2 82.6±1.2 72.3±0.8 84.0±1.0 74.8±2.2 82.7±1.4 73.4±1.3 81.9±1.8 71.3±1.3 82.1±1.2 74.6±1.8 83.2±0.9
73.5
76.1±1.4 79.9±1.0 72.0±1.0 81.5±1.8 75.6±2.1 83.9±1.7 71.6±1.3 83.7±1.5 75.7±1.3 82.0±1.3 71.7±1.0 82.2±1.8 73.5±2.1 84.2±1.6
72.9±1.8 84.5±1.9 69.2±1.3 83.2±1.3 69.4±2.4 82.9±2.0 72.7±2.2 84.4±1.2 73.2±1.3 84.0±1.4 73.1±1.3 82.3±1.3 66.5±1.6 70.4±2.5 64.6±2.4 70.1±1.0 71.6±1.6 73.8±2.2 73.7±1.5 76.2±0.4 74.8±1.2 73.1±1.6 76.9±1.2 73.6±1.1
72.0
65.2±1.6 68.3±0.9 73.9±2.3 70.8±3.6 69.6±1.5 74.6±1.3 69.6±1.9 71.6±2.5 72.4±1.8 73.3±1.2 75.0±2.9 72.7±2.0 76.1±1.6 74.7±1.2 75.4±1.4 68.5±2.8 76.9±1.7 75.3±0.7 73.8±1.5 72.2±1.6 w80.0±1.1 w w. i G r o75.4±1.9 w. o r g ® 71.2±1.0 75.1±1.1
Junea 60 80 100 120 140 160 180 Juneb 60b 80b 100 Planting adate3/ 120abRate Seeding 4 140a (thousands) 160ab 180ab June Juneba 60 60 80 80 100 100 120 120 140 140 160 160 180 180 June Junebb 60 60bb 80 80ab b 100 100aa 120 120ab ab 140 140aa 160ab a 160 180ab a 180 June Junebb 60 60d 80 80c 100 100b 120 120b 140 ab 140 160 160a
64.9±1.3 64.3±1.8 68.7±1.2 67.1±1.0 71.0±1.0 68.0±1.4 69.5±0.8 65.3±0.8 66.5±0.5 Yield by treatment (bushels/acre) 68.8±1.8 68.5±0.9 68.4±0.8 67.6±1.1 66.6±0.9 66.6±1.7 67.5±1.0 70.2±1.0 67.0±0.8 + Untreated Fungicide Fungicide 67.2±1.9 68.1±1.2 66.4±0.7 Insecticide 51.2±2.4 70.4±2.3 54.3±2.1 67.8±1.3 52.1±1.3 69.6±1.7 56.7±1.6 67.9±0.6 58.8±3.3 70.2±2.3 58.2±2.0 69.5±0.9 59.1±2.0 67.4±1.9
48.5±2.3 69.7±1.6 55.8±1.5 71.5±1.4 55.9±1.4 70.1±1.3 57.2±1.1 71.2±1.1 56.7±2.9 69.7±1.4 57.4±0.8 70.5±1.0 61.9±1.6 70.7±1.8
46.1±1.0 70.7±1.0 50.1±1.7 69.6±0.7 51.8±1.2 68.8±1.3 56.5±0.9 69.8±2.5 54.8±1.2 68.7±1.7 58.8±1.0 69.3±2.0 60.9±1.4 68.7±2.0
64.9±1.3 Average:59.5±5.2 55.8
62.9±1.6 64.3±1.8 56.2
64.2±1.9 68.7±1.2 66.5±3.8 68.0±1.4 68.4±2.4 66.5±0.5 65.9±1.9 68.4±0.8 69.0±2.3 66.6±1.7 71.0±2.3 67.0±0.8 68.5±2.8 66.4±0.7
60.3±3.0 67.1±1.0 66.0±2.3 69.5±0.8 60.2±4.1 68.8±1.8 68.7±3.2 67.6±1.1 61.8±3.7 67.5±1.0 68.2±2.2 67.2±1.9
63.7±3.8 71.0±1.0 67.0±3.2 65.3±0.8 64.2±2.5 68.5±0.9 64.8±3.5 66.6±0.9 68.5±1.7 70.2±1.0 66.1±2.7 68.1±1.2
54.1
50.4±2.6 51.3±1.2 52.7±1.9 51.2±2.4 48.5±2.3 46.1±1.0 61.7±1.4 59.6±2.3 57.9±1.7 54.3±2.1 55.8±1.5 50.1±1.7 62.5±1.7 65.0±1.8 63.1±1.2 52.1±1.3 55.9±1.4 51.8±1.2 64.0±1.9 67.3±1.9 64.1±0.8 56.7±1.6 57.2±1.1 56.5±0.9 65.4±2.1 67.3±1.4 65.4±1.6 58.8±3.3 56.7±2.9 54.8±1.2 © 2015 South 68.2±1.0 Dakota Board of Regents 69.8±1.2 67.6±1.0 58.2±2.0 57.4±0.8 58.8±1.0
140 160 180 Maya 60b 80a 100a 120a 140a 160a 180a Maya 60ab 80ab 100a Planting date3/ Seeding 120aRate 4 (thousands) 140a 160a 180a Mayab 60 80 100 120 140 160 180 Maya b 60d a 80c 100b a 120ab a 120 140a 160a 180a Mayba 60 60ab b 80 80ab a 100ab a 100 120 a 120ab 140a 160a
54.6±1.8 50.4±1.9 54.6±3.1
53.9±0.9 54.6±2.4 53.1±1.8
56.7±2.7 53.7±2.6 54.5±1.8
81.6±1.5 84.5±1.9 83.2±1.3 82.9±2.0 84.4±1.2 84.0±1.4 82.3±1.3
80.1±1.2 82.6±1.2 84.0±1.0 82.7±1.4 81.9±1.8 82.1±1.2 83.2±0.9
79.9±1.0 81.5±1.8 83.9±1.7 83.7±1.5 82.0±1.3 82.2±1.8 84.2±1.6
140 160 180 Juneb 60b 80b 100a 120ab 140a 160ab 180ab Juneb 60 80 100date3/ Planting Seeding 120 Rate 4 (thousands) 140 160 180 Juneba June 60 60 b 80 80ab 100a 100 120 120 ab 140a 140 160a 160 180a 180 Junebb June 60db 60 80cb 80 100 100ba 120 120ab b 140 a 140 ab 160 160ab a 180 180ab a Juneab June 60 60 b 80 80 b 100a 100 120a 120 140a 140 160 160 ab
70.2±2.3 69.5±0.9 67.4±1.9
69.7±1.4 70.5±1.0 70.7±1.8
68.7±1.7 69.3±2.0 68.7±2.0
64.9±1.3 67.1±1.0 69.5±0.8 68.8±1.8 67.6±1.1 67.5±1.0 67.2±1.9
64.3±1.8 71.0±1.0 65.3±0.8 68.5±0.9 66.6±0.9 70.2±1.0 68.1±1.2
68.7±1.2 68.0±1.4 66.5±0.5 68.4±0.8 66.6±1.7 67.0±0.8 66.4±0.7
2016 Yield: Southeast Farm Volgaa
Brookingsc
Year1/ Location2
2016a South Shore Beresford bc
2017b Volga a a South Shore
Brookings Volgac c
70.4±2.5 73.9±2.3 70.8±3.6 70.1±1.0 69.6±1.9 71.6±2.5 73.8±2.2 75.0±2.9 72.7±2.0 Yield by treatment (bushels/acre) 76.2±0.4 75.4±1.4 68.5±2.8 73.1±1.6 73.8±1.5 72.2±1.6 Untreated Fungicide Fungicide 73.6±1.1 71.2±1.0 75.1±1.1 + Insecticide 74.5±1.0 75.5±1.6 73.3±1.7
63.4±2.2 74.3±1.5 58.0±2.5 72.9±1.8 55.6±1.4 69.2±1.3 57.3±3.0 69.4±2.4 54.6±1.8 72.7±2.2 50.4±1.9 73.2±1.3 54.6±3.1 73.1±1.3
62.8±4.0 73.7±1.6 57.3±2.6 73.2±1.2 58.3±2.6 72.3±0.8 57.6±2.7 74.8±2.2 53.9±0.9 73.4±1.3 54.6±2.4 71.3±1.3 53.1±1.8 74.6±1.8
59.7±2.0 76.1±1.4 58.0±1.7 72.0±1.0 53.5±1.7 75.6±2.1 55.5±2.6 71.6±1.3 56.7±2.7 75.7±1.3 53.7±2.6 71.7±1.0 54.5±1.8 73.5±2.1
81.6±1.5 Average:66.5±1.6 72.1 84.5±1.9 64.6±2.4
80.1±1.2 65.2±1.6 82.6±1.2 69.6±1.5 84.0±1.0 72.4±1.8 82.7±1.4 76.1±1.6 81.9±1.8 76.9±1.7 82.1±1.2 80.0±1.1 83.2±0.9 78.5±1.3
79.9±1.0 68.3±0.9 81.5±1.8 74.6±1.3 83.9±1.7 73.3±1.2 83.7±1.5 74.7±1.2 82.0±1.3 75.3±0.7 82.2±1.8 75.4±1.9 84.2±1.6 77.2±1.9
83.2±1.3 71.6±1.6 82.9±2.0 73.7±1.5 84.4±1.2 74.8±1.2 84.0±1.4 76.9±1.2 82.3±1.3 77.6±1.7
73.3
73.7
1.6 bu/acre increase
70.4±2.5 51.8±1.7 70.1±1.0 53.1±1.2 73.8±2.2 53.0±1.1 76.2±0.4 53.1±1.0 73.1±1.6 56.7±2.2 73.6±1.1 58.1±1.3
73.9±2.3 70.8±3.6 52.3±1.6 55.2±1.1 69.6±1.9 71.6±2.5 57.4±3.0 59.1±1.6 75.0±2.9 72.7±2.0 56.9±1.5 55.4±1.6 75.4±1.4 68.5±2.8 54.4±2.0 59.0±1.3 73.8±1.5 72.2±1.6 w56.3±2.0 w w. i G r o57.8±2.8 w. o r g ® 71.2±1.0 75.1±1.1 58.6±1.6 57.3±1.7
51.2±2.4 48.5±2.3 46.1±1.0 54.3±2.1 55.8±1.5 50.1±1.7 52.1±1.3 55.9±1.4(bushels/acre) 51.8±1.2 Yield by treatment 56.7±1.6 57.2±1.1 56.5±0.9 58.8±3.3 56.7±2.9 54.8±1.2 Untreated Fungicide Fungicide 58.2±2.0 57.4±0.8 58.8±1.0 + Insecticide 59.1±2.0 61.9±1.6 60.9±1.4
70.4±2.3 59.5±5.2 67.8±1.3 60.3±3.0 69.6±1.7 66.0±2.3 67.9±0.6 60.2±4.1 70.2±2.3 68.7±3.2 69.5±0.9 61.8±3.7 67.4±1.9 68.2±2.2
69.7±1.6 62.9±1.6 71.5±1.4 63.7±3.8 70.1±1.3 67.0±3.2 71.2±1.1 64.2±2.5 69.7±1.4 64.8±3.5 70.5±1.0 68.5±1.7 70.7±1.8 66.1±2.7
70.7±1.0 64.2±1.9 69.6±0.7 66.5±3.8 68.8±1.3 68.4±2.4 69.8±2.5 65.9±1.9 68.7±1.7 69.0±2.3 69.3±2.0 71.0±2.3 68.7±2.0 68.5±2.8
64.9±1.3 Average:50.4±2.6 63.5 67.1±1.0 61.7±1.4
64.3±1.8 51.3±1.2 71.0±1.0 59.6±2.3 65.3±0.8 65.0±1.8 68.5±0.9 67.3±1.9 66.6±0.9 67.3±1.4 70.2±1.0 68.2±1.0 68.1±1.2 68.8±1.6
68.7±1.2 52.7±1.9 68.0±1.4 57.9±1.7 66.5±0.5 63.1±1.2 68.4±0.8 64.1±0.8 66.6±1.7 65.4±1.6 67.0±0.8 67.6±1.0 66.4±0.7 70.1±1.3
69.5±0.8 62.5±1.7 68.8±1.8 64.0±1.9 67.6±1.1 65.4±2.1 67.5±1.0 69.8±1.2 67.2±1.9 67.7±1.4
65.3
67.6
4.1 bu/acre increase
51.2±2.4 48.5±2.3 46.1±1.0 55.9±2.0 56.4±2.4 56.6±2.3 54.3±2.1 55.8±1.5 50.1±1.7 58.1±0.9 55.1±2.1 59.2±1.4 52.1±1.3 55.9±1.4 51.8±1.2 57.8±2.1 59.6±1.8 61.3±1.1 56.7±1.6 57.2±1.1 56.5±0.9 58.1±1.8 60.8±1.2 61.4±2.2 58.8±3.3 56.7±2.9 54.8±1.2 58.2±1.3 61.8±1.7 © 2015 South 59.1±2.4 Dakota Board of Regents 58.2±2.0 57.4±0.8 58.8±1.0 61.0±2.0 63.7±0.8 63.1±1.8
140 160 180 Maya 60b 80a 100a 120a 140a 160a 180a Maya 60ab 80ab 100a Planting date3/ Seeding 120aRate 4 (thousands) 140a 160a 180a Mayab 60 80 100 120 140 160 180 Maya b 60d a 80c 100b a 120ab a 120 140a 160a 180a Mayba 60 60ab b 80 80ab a 100ab a 100 120 a 120ab 140a 160a
54.6±1.8 50.4±1.9 54.6±3.1
53.9±0.9 54.6±2.4 53.1±1.8
56.7±2.7 53.7±2.6 54.5±1.8
81.6±1.5 84.5±1.9 83.2±1.3 82.9±2.0 84.4±1.2 84.0±1.4 82.3±1.3
80.1±1.2 82.6±1.2 84.0±1.0 82.7±1.4 81.9±1.8 82.1±1.2 83.2±0.9
79.9±1.0 81.5±1.8 83.9±1.7 83.7±1.5 82.0±1.3 82.2±1.8 84.2±1.6
140 160 180 Juneb 60b 80b 100a 120ab 140a 160ab 180ab Juneb 60 80 100date3/ Planting Seeding 120 Rate 4 (thousands) 140 160 180 Juneba June 60 60 b 80 80ab 100a 100 120 120 ab 140a 140 160a 160 180a 180 Junebb June 60db 60 80cb 80 100 100ba 120 120ab b 140 a 140 ab 160 160ab a 180 180ab a Juneab June 60 60 b 80 80 b 100a 100 120a 120 140a 140 160 160 ab
70.2±2.3 69.5±0.9 67.4±1.9
69.7±1.4 70.5±1.0 70.7±1.8
68.7±1.7 69.3±2.0 68.7±2.0
64.9±1.3 67.1±1.0 69.5±0.8 68.8±1.8 67.6±1.1 67.5±1.0 67.2±1.9
64.3±1.8 71.0±1.0 65.3±0.8 68.5±0.9 66.6±0.9 70.2±1.0 68.1±1.2
68.7±1.2 68.0±1.4 66.5±0.5 68.4±0.8 66.6±1.7 67.0±0.8 66.4±0.7
2016 Yield: Southeast Farm Volgaa
Brookingsc
Year1/ Location2
2016a South Shore Beresford bc
2017b Volga a a South Shore
Brookings Volgac c
70.4±2.5 73.9±2.3 70.8±3.6 70.1±1.0 69.6±1.9 71.6±2.5 73.8±2.2 75.0±2.9 72.7±2.0 Yield by treatment (bushels/acre) 76.2±0.4 75.4±1.4 68.5±2.8 73.1±1.6 73.8±1.5 72.2±1.6 Untreated Fungicide Fungicide 73.6±1.1 71.2±1.0 75.1±1.1 + Insecticide 74.5±1.0 75.5±1.6 73.3±1.7
63.4±2.2 74.3±1.5 58.0±2.5 72.9±1.8 55.6±1.4 69.2±1.3 57.3±3.0 69.4±2.4 54.6±1.8 72.7±2.2 50.4±1.9 73.2±1.3 54.6±3.1 73.1±1.3
62.8±4.0 73.7±1.6 57.3±2.6 73.2±1.2 58.3±2.6 72.3±0.8 57.6±2.7 74.8±2.2 53.9±0.9 73.4±1.3 54.6±2.4 71.3±1.3 53.1±1.8 74.6±1.8
59.7±2.0 76.1±1.4 58.0±1.7 72.0±1.0 53.5±1.7 75.6±2.1 55.5±2.6 71.6±1.3 56.7±2.7 75.7±1.3 53.7±2.6 71.7±1.0 54.5±1.8 73.5±2.1
81.6±1.5 Average:66.5±1.6 72.1 84.5±1.9 64.6±2.4
80.1±1.2 65.2±1.6 82.6±1.2 69.6±1.5 84.0±1.0 72.4±1.8 82.7±1.4 76.1±1.6 81.9±1.8 76.9±1.7 82.1±1.2 80.0±1.1 83.2±0.9 78.5±1.3
79.9±1.0 68.3±0.9 81.5±1.8 74.6±1.3 83.9±1.7 73.3±1.2 83.7±1.5 74.7±1.2 82.0±1.3 75.3±0.7 82.2±1.8 75.4±1.9 84.2±1.6 77.2±1.9
83.2±1.3 71.6±1.6 82.9±2.0 73.7±1.5 84.4±1.2 74.8±1.2 84.0±1.4 76.9±1.2 82.3±1.3 77.6±1.7 70.4±2.5 51.8±1.7 70.1±1.0 53.1±1.2 73.8±2.2 53.0±1.1 76.2±0.4 53.1±1.0 73.1±1.6 56.7±2.2 73.6±1.1 58.1±1.3
73.3
73.7
73.9±2.3 70.8±3.6 52.3±1.6 55.2±1.1 69.6±1.9 71.6±2.5 57.4±3.0 59.1±1.6 75.0±2.9 72.7±2.0 56.9±1.5 55.4±1.6 75.4±1.4 68.5±2.8 54.4±2.0 59.0±1.3 73.8±1.5 72.2±1.6 w56.3±2.0 w w. i G r o57.8±2.8 w. o r g ® 71.2±1.0 75.1±1.1 58.6±1.6 57.3±1.7
51.2±2.4 48.5±2.3 46.1±1.0 54.3±2.1 55.8±1.5 50.1±1.7 52.1±1.3 55.9±1.4(bushels/acre) 51.8±1.2 Yield by treatment 56.7±1.6 57.2±1.1 56.5±0.9 58.8±3.3 56.7±2.9 54.8±1.2 Untreated Fungicide Fungicide 58.2±2.0 57.4±0.8 58.8±1.0 + Insecticide 59.1±2.0 61.9±1.6 60.9±1.4
70.4±2.3 59.5±5.2 67.8±1.3 60.3±3.0 69.6±1.7 66.0±2.3 67.9±0.6 60.2±4.1 70.2±2.3 68.7±3.2 69.5±0.9 61.8±3.7 67.4±1.9 68.2±2.2
69.7±1.6 62.9±1.6 71.5±1.4 63.7±3.8 70.1±1.3 67.0±3.2 71.2±1.1 64.2±2.5 69.7±1.4 64.8±3.5 70.5±1.0 68.5±1.7 70.7±1.8 66.1±2.7
70.7±1.0 64.2±1.9 69.6±0.7 66.5±3.8 68.8±1.3 68.4±2.4 69.8±2.5 65.9±1.9 68.7±1.7 69.0±2.3 69.3±2.0 71.0±2.3 68.7±2.0 68.5±2.8
64.9±1.3 Average:50.4±2.6 63.5 67.1±1.0 61.7±1.4
64.3±1.8 51.3±1.2 71.0±1.0 59.6±2.3 65.3±0.8 65.0±1.8 68.5±0.9 67.3±1.9 66.6±0.9 67.3±1.4 70.2±1.0 68.2±1.0 68.1±1.2 68.8±1.6
68.7±1.2 52.7±1.9 68.0±1.4 57.9±1.7 66.5±0.5 63.1±1.2 68.4±0.8 64.1±0.8 66.6±1.7 65.4±1.6 67.0±0.8 67.6±1.0 66.4±0.7 70.1±1.3
69.5±0.8 62.5±1.7 68.8±1.8 64.0±1.9 67.6±1.1 65.4±2.1 67.5±1.0 69.8±1.2 67.2±1.9 67.7±1.4
65.3
67.6
51.2±2.4 48.5±2.3 46.1±1.0 55.9±2.0 56.4±2.4 56.6±2.3 54.3±2.1 55.8±1.5 50.1±1.7 58.1±0.9 55.1±2.1 59.2±1.4 52.1±1.3 55.9±1.4 51.8±1.2 57.8±2.1 59.6±1.8 61.3±1.1 56.7±1.6 57.2±1.1 56.5±0.9 58.1±1.8 60.8±1.2 61.4±2.2 58.8±3.3 56.7±2.9 54.8±1.2 58.2±1.3 61.8±1.7 © 2015 South 59.1±2.4 Dakota Board of Regents 58.2±2.0 57.4±0.8 58.8±1.0 61.0±2.0 63.7±0.8 63.1±1.8
140 160 180 Maya 60b 80a 100a 120a 140a 160a 180a Maya 60ab 80ab 100a Planting date3/ Seeding 120aRate 4 (thousands) 140a 160a 180a Mayab 60 80 100 120 140 160 180 Maya b 60d a 80c 100b a 120ab a 120 140a 160a 180a Mayba 60 60ab b 80 80ab a 100ab a 100 120 a 120ab 140a 160a
54.6±1.8 50.4±1.9 54.6±3.1
53.9±0.9 54.6±2.4 53.1±1.8
56.7±2.7 53.7±2.6 54.5±1.8
81.6±1.5 84.5±1.9 83.2±1.3 82.9±2.0 84.4±1.2 84.0±1.4 82.3±1.3
80.1±1.2 82.6±1.2 84.0±1.0 82.7±1.4 81.9±1.8 82.1±1.2 83.2±0.9
79.9±1.0 81.5±1.8 83.9±1.7 83.7±1.5 82.0±1.3 82.2±1.8 84.2±1.6
140 160 180 Juneb 60b 80b 100a 120ab 140a 160ab 180ab Juneb 60 80 100date3/ Planting Seeding 120 Rate 4 (thousands) 140 160 180 Juneba June 60 60 b 80 80ab 100a 100 120 120 ab 140a 140 160a 160 180a 180 Junebb June 60db 60 80cb 80 100 100ba 120 120ab b 140 a 140 ab 160 160ab a 180 180ab a Juneab June 60 60 b 80 80 b 100a 100 120a 120 140a 140 160 160 ab
70.2±2.3 69.5±0.9 67.4±1.9
69.7±1.4 70.5±1.0 70.7±1.8
68.7±1.7 69.3±2.0 68.7±2.0
64.9±1.3 67.1±1.0 69.5±0.8 68.8±1.8 67.6±1.1 67.5±1.0 67.2±1.9
64.3±1.8 71.0±1.0 65.3±0.8 68.5±0.9 66.6±0.9 70.2±1.0 68.1±1.2
68.7±1.2 68.0±1.4 66.5±0.5 68.4±0.8 66.6±1.7 67.0±0.8 66.4±0.7
2016 Yield: Southeast Farm Volgaa
Brookingsc
Year1/ Location2
2016a South Shore Beresford bc
2017b Volga a a South Shore
Brookings Volgac c
70.4±2.5 73.9±2.3 70.8±3.6 70.1±1.0 69.6±1.9 71.6±2.5 73.8±2.2 75.0±2.9 72.7±2.0 Yield by treatment (bushels/acre) 76.2±0.4 75.4±1.4 68.5±2.8 73.1±1.6 73.8±1.5 72.2±1.6 Untreated Fungicide Fungicide 73.6±1.1 71.2±1.0 75.1±1.1 + Insecticide 74.5±1.0 75.5±1.6 73.3±1.7
63.4±2.2 74.3±1.5 58.0±2.5 72.9±1.8 55.6±1.4 69.2±1.3 57.3±3.0 69.4±2.4 54.6±1.8 72.7±2.2 50.4±1.9 73.2±1.3 54.6±3.1 73.1±1.3
62.8±4.0 73.7±1.6 57.3±2.6 73.2±1.2 58.3±2.6 72.3±0.8 57.6±2.7 74.8±2.2 53.9±0.9 73.4±1.3 54.6±2.4 71.3±1.3 53.1±1.8 74.6±1.8
59.7±2.0 76.1±1.4 58.0±1.7 72.0±1.0 53.5±1.7 75.6±2.1 55.5±2.6 71.6±1.3 56.7±2.7 75.7±1.3 53.7±2.6 71.7±1.0 54.5±1.8 73.5±2.1
81.6±1.5 Average:66.5±1.6 72.1 84.5±1.9 64.6±2.4
80.1±1.2 65.2±1.6 82.6±1.2 69.6±1.5 84.0±1.0 72.4±1.8 82.7±1.4 76.1±1.6 81.9±1.8 76.9±1.7 82.1±1.2 80.0±1.1 83.2±0.9 78.5±1.3
79.9±1.0 68.3±0.9 81.5±1.8 74.6±1.3 83.9±1.7 73.3±1.2 83.7±1.5 74.7±1.2 82.0±1.3 75.3±0.7 82.2±1.8 75.4±1.9 84.2±1.6 77.2±1.9
83.2±1.3 71.6±1.6 82.9±2.0 73.7±1.5 84.4±1.2 74.8±1.2 84.0±1.4 76.9±1.2 82.3±1.3 77.6±1.7 70.4±2.5 51.8±1.7 70.1±1.0 53.1±1.2 73.8±2.2 53.0±1.1 76.2±0.4 53.1±1.0 73.1±1.6 56.7±2.2 73.6±1.1 58.1±1.3
73.3
73.7
73.9±2.3 70.8±3.6 52.3±1.6 55.2±1.1 69.6±1.9 71.6±2.5 57.4±3.0 59.1±1.6 75.0±2.9 72.7±2.0 56.9±1.5 55.4±1.6 75.4±1.4 68.5±2.8 54.4±2.0 59.0±1.3 73.8±1.5 72.2±1.6 w56.3±2.0 w w. i G r o57.8±2.8 w. o r g ® 71.2±1.0 75.1±1.1 58.6±1.6 57.3±1.7
51.2±2.4 48.5±2.3 46.1±1.0 54.3±2.1 55.8±1.5 50.1±1.7 52.1±1.3 55.9±1.4(bushels/acre) 51.8±1.2 Yield by treatment 56.7±1.6 57.2±1.1 56.5±0.9 58.8±3.3 56.7±2.9 54.8±1.2 Untreated Fungicide Fungicide 58.2±2.0 57.4±0.8 58.8±1.0 + Insecticide 59.1±2.0 61.9±1.6 60.9±1.4
70.4±2.3 59.5±5.2 67.8±1.3 60.3±3.0 69.6±1.7 66.0±2.3 67.9±0.6 60.2±4.1 70.2±2.3 68.7±3.2 69.5±0.9 61.8±3.7 67.4±1.9 68.2±2.2
69.7±1.6 62.9±1.6 71.5±1.4 63.7±3.8 70.1±1.3 67.0±3.2 71.2±1.1 64.2±2.5 69.7±1.4 64.8±3.5 70.5±1.0 68.5±1.7 70.7±1.8 66.1±2.7
70.7±1.0 64.2±1.9 69.6±0.7 66.5±3.8 68.8±1.3 68.4±2.4 69.8±2.5 65.9±1.9 68.7±1.7 69.0±2.3 69.3±2.0 71.0±2.3 68.7±2.0 68.5±2.8
64.9±1.3 Average:50.4±2.6 63.5 67.1±1.0 61.7±1.4
64.3±1.8 51.3±1.2 71.0±1.0 59.6±2.3 65.3±0.8 65.0±1.8 68.5±0.9 67.3±1.9 66.6±0.9 67.3±1.4 70.2±1.0 68.2±1.0 68.1±1.2 68.8±1.6
68.7±1.2 52.7±1.9 68.0±1.4 57.9±1.7 66.5±0.5 63.1±1.2 68.4±0.8 64.1±0.8 66.6±1.7 65.4±1.6 67.0±0.8 67.6±1.0 66.4±0.7 70.1±1.3
69.5±0.8 62.5±1.7 68.8±1.8 64.0±1.9 67.6±1.1 65.4±2.1 67.5±1.0 69.8±1.2 67.2±1.9 67.7±1.4
65.3
67.6
51.2±2.4 48.5±2.3 46.1±1.0 55.9±2.0 56.4±2.4 56.6±2.3 54.3±2.1 55.8±1.5 50.1±1.7 58.1±0.9 55.1±2.1 59.2±1.4 52.1±1.3 55.9±1.4 51.8±1.2 57.8±2.1 59.6±1.8 61.3±1.1 56.7±1.6 57.2±1.1 56.5±0.9 58.1±1.8 60.8±1.2 61.4±2.2 58.8±3.3 56.7±2.9 54.8±1.2 58.2±1.3 61.8±1.7 © 2015 South 59.1±2.4 Dakota Board of Regents 58.2±2.0 57.4±0.8 58.8±1.0 61.0±2.0 63.7±0.8 63.1±1.8
100a 120a 140a 160a 180a Maya 60 80 100date3/ Planting 120Rate Seeding 4 140 (thousands) 160 180 May Mayba 60d 60 80c 80 100b 100 120ab 120 140a 140 160a 160 180 180a May Mayab 60bb 60 80 80aa 100 100ab a 120 120ab a 140aa 140 160aa 160 180aa 180 Mayab May 60ab b 60 80ab b 80 100 100ab a 120 120ab a 140 140ab a 160aa 160 180 180ab a Mayaa May 60 60b 80 80a 100 100a 120 120a 140 140a 160 160a 180 180a Maya 60d 80c 100b
2017 Yield Beresfordb
Year1/ Location2
2016 a 2017b South South Shore Shoreca
Volgaac Volga
Brookingscc Brookings
Beresfordbb Beresford
2017b South Shorea
73.8±2.2 76.2±0.4 73.1±1.6 73.6±1.1 74.5±1.0
75.0±2.9 75.4±1.4 73.8±1.5 71.2±1.0 75.5±1.6
72.7±2.0 68.5±2.8 72.2±1.6 75.1±1.1 73.3±1.7
74.3±1.5 73.7±1.6 76.1±1.4 72.9±1.8 73.2±1.2 72.0±1.0 69.2±1.3 72.3±0.8 75.6±2.1 Yield by treatment (bushels/acre) 69.4±2.4 74.8±2.2 71.6±1.3 72.7±2.2 73.4±1.3 75.7±1.3 73.2±1.3 71.3±1.3 71.7±1.0+ Untreated Fungicide Fungicide Insecticide 73.1±1.3 74.6±1.8 73.5±2.1
63.4±2.2 66.5±1.6 58.0±2.5 64.6±2.4 55.6±1.4 71.6±1.6 57.3±3.0 73.7±1.5 54.6±1.8 74.8±1.2 50.4±1.9 76.9±1.2 77.6±1.7 54.6±3.1
62.8±4.0 65.2±1.6 57.3±2.6 69.6±1.5 58.3±2.6 72.4±1.8 57.6±2.7 76.1±1.6 53.9±0.9 76.9±1.7 54.6±2.4 80.0±1.1 78.5±1.3 53.1±1.8
59.7±2.0 68.3±0.9 58.0±1.7 74.6±1.3 53.5±1.7 73.3±1.2 55.5±2.6 74.7±1.2 56.7±2.7 75.3±0.7 53.7±2.6 75.4±1.9 77.2±1.9 54.5±1.8
51.8±1.7 81.6±1.5 84.5±1.9 53.1±1.2 53.0±1.1 83.2±1.3 53.1±1.0 82.9±2.0 56.7±2.2 84.4±1.2 58.1±1.3 84.0±1.4 57.6±1.5 82.3±1.3
52.3±1.6 80.1±1.2 82.6±1.2 57.4±3.0 56.9±1.5 84.0±1.0 54.4±2.0 82.7±1.4 56.3±2.0 81.9±1.8 58.6±1.6 82.1±1.2 54.9±1.9 83.2±0.9
55.2±1.1 79.9±1.0 81.5±1.8 59.1±1.6 55.4±1.6 83.9±1.7 59.0±1.3 83.7±1.5 57.8±2.8 82.0±1.3 57.3±1.7 82.2±1.8 57.6±1.7 84.2±1.6
46.1±3.1 70.4±2.5 51.7±4.4 70.1±1.0 55.0±3.9 73.8±2.2 49.9±3.3 76.2±0.4 61.0±3.4 73.1±1.6 56.9±3.4 73.6±1.1 57.3±3.1 74.5±1.0
49.1±3.5 73.9±2.3 55.5±3.8 69.6±1.9 58.7±3.3 75.0±2.9 59.1±4.4 75.4±1.4 55.4±3.9 73.8±1.5 56.8±4.6 71.2±1.0 64.8±3.0 75.5±1.6
51.8±4.8 70.8±3.6 52.9±2.8 71.6±2.5 50.5±2.8 72.7±2.0 56.2±4.4 68.5±2.8 56.2±5.4 72.2±1.6 66.1±3.0 75.1±1.1 55.9±3.5 73.3±1.7
50.0±3.5 74.3±1.5 62.2±3.1 72.9±1.8 61.8±3.8 69.2±1.3 63.8±3.0 69.4±2.4 64.4±2.1 72.7±2.2 66.5±2.5 73.2±1.3 66.1±3.7 73.1±1.3
55.1±3.1 73.7±1.6 64.2±5.3 73.2±1.2 54.1±10.1 72.3±0.8 66.7±1.4 74.8±2.2 67.1±1.7 73.4±1.3 67.8±2.7 71.3±1.3 69.0±2.5 74.6±1.8
57.1±6.2 76.1±1.4 66.0±2.7 72.0±1.0 69.9±3.0 75.6±2.1 67.4±2.5 71.6±1.3 65.9±3.2 75.7±1.3 70.3±2.0 71.7±1.0 67.8±1.3 73.5±2.1
66.5±1.6 64.6±2.4 71.6±1.6
65.2±1.6 69.6±1.5 72.4±1.8
68.3±0.9 74.6±1.3 73.3±1.2
w w w. i G r o w. o r g
100 120 140 160 180 Juneb 60b 80ab 100date a 3/ Planting 120ab Seeding Rate 140a 4 (thousands) 160a 180a Juneab 60d 60 80c 80 100b 100 120b 120 140 140 ab 160a 160 180 180a Juneba 60b 80b 100a 120ab a 120 140a 160ab 180ab Juneba 60 80 100 120 140 160 180 Juneb 60b 60 80 80 ab 100a 100 120 120 ab 140a 140 160a 160 180a 180 Juneb 60d 80c ® 100b
52.1±1.3 56.7±1.6 58.8±3.3 58.2±2.0 59.1±2.0
55.9±1.4 57.2±1.1 56.7±2.9 57.4±0.8 61.9±1.6
51.8±1.2 56.5±0.9 54.8±1.2 58.8±1.0 60.9±1.4
59.5±5.2 62.9±1.6 64.2±1.9 60.3±3.0 63.7±3.8 66.5±3.8 66.0±2.3 67.0±3.2 68.4±2.4 Yield by treatment (bushels/acre) 60.2±4.1 64.2±2.5 65.9±1.9 68.7±3.2 64.8±3.5 69.0±2.3 61.8±3.7 68.5±1.7 71.0±2.3 + Untreated Fungicide Fungicide Insecticide 68.2±2.2 66.1±2.7 68.5±2.8
70.4±2.3 50.4±2.6 67.8±1.3 61.7±1.4 69.6±1.7 62.5±1.7 67.9±0.6 64.0±1.9 70.2±2.3 65.4±2.1 69.5±0.9 69.8±1.2 67.7±1.4 67.4±1.9
69.7±1.6 51.3±1.2 71.5±1.4 59.6±2.3 70.1±1.3 65.0±1.8 71.2±1.1 67.3±1.9 69.7±1.4 67.3±1.4 70.5±1.0 68.2±1.0 68.8±1.6 70.7±1.8
70.7±1.0 52.7±1.9 69.6±0.7 57.9±1.7 68.8±1.3 63.1±1.2 69.8±2.5 64.1±0.8 68.7±1.7 65.4±1.6 69.3±2.0 67.6±1.0 70.1±1.3 68.7±2.0
55.9±2.0 64.9±1.3 67.1±1.0 58.1±0.9 57.8±2.1 69.5±0.8 58.1±1.8 68.8±1.8 58.2±1.3 67.6±1.1 61.0±2.0 67.5±1.0 63.8±2.6 67.2±1.9
56.4±2.4 64.3±1.8 71.0±1.0 55.1±2.1 59.6±1.8 65.3±0.8 60.8±1.2 68.5±0.9 59.1±2.4 66.6±0.9 63.7±0.8 70.2±1.0 64.4±1.5 68.1±1.2
56.6±2.3 68.7±1.2 68.0±1.4 59.2±1.4 61.3±1.1 66.5±0.5 61.4±2.2 68.4±0.8 61.8±1.7 66.6±1.7 63.1±1.8 67.0±0.8 62.6±1.5 66.4±0.7
62.9±1.2 51.2±2.4 59.9±3.3 54.3±2.1 56.8±3.1 52.1±1.3 64.1±2.1 56.7±1.6 61.0±3.4 58.8±3.3 59.6±3.7 58.2±2.0 60.3±4.5 59.1±2.0
60.4±3.6 48.5±2.3 61.1±4.7 55.8±1.5 65.5±2.0 55.9±1.4 64.8±2.5 57.2±1.1 61.3±3.9 56.7±2.9 65.3±2.1 57.4±0.8 65.5±3.6 61.9±1.6
62.7±4.0 46.1±1.0 59.4±4.0 50.1±1.7 63.9±2.3 51.8±1.2 62.7±1.0 56.5±0.9 64.9±2.2 54.8±1.2 62.9±3.6 58.8±1.0 59.8±4.1 60.9±1.4
58.7±1.4 59.5±5.2 50.5±9.1 60.3±3.0 61.3±1.5 66.0±2.3 56.4±3.9 60.2±4.1 57.1±1.0 68.7±3.2 56.7±0.9 61.8±3.7 59.0±1.3 68.2±2.2
58.1±2.0 62.9±1.6 55.8±2.3 63.7±3.8 58.2±1.5 67.0±3.2 59.0±1.1 64.2±2.5 57.0±1.5 64.8±3.5 56.7±1.6 68.5±1.7 58.6±1.1 66.1±2.7
56.3±1.6 64.2±1.9 59.1±1.3 66.5±3.8 57.1±1.2 68.4±2.4 61.3±1.5 65.9±1.9 60.2±1.5 69.0±2.3 60.1±1.5 71.0±2.3 62.3±0.7 68.5±2.8
50.4±2.6 61.7±1.4 62.5±1.7 ©
51.3±1.2 59.6±2.3 65.0±1.8 2015 South
52.7±1.9 57.9±1.7 63.1±1.2 Dakota Board
of Regents
140a 160a 180a Maya 60ab 80ab 100a 120a 140a 160a 180a Maya 60 80 100 Planting date3/ 120Rate Seeding 4 140 (thousands) 160 180 May Mayba 60d 60 80c 80 100b 100 120ab 120 140a 140 160 160a 180 180a May Mayab 60bb 60 80aa 80 100 100ab a 120 120ab a 140aa 140 160aa 160 180aa 180 Mayab May 60ab b 60 80ab b 80 100 100ab a 120 120ab a 140 140ab a 160 160aa
84.4±1.2 84.0±1.4 82.3±1.3
81.9±1.8 82.1±1.2 83.2±0.9
82.0±1.3 82.2±1.8 84.2±1.6
70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6 73.6±1.1 74.5±1.0
73.9±2.3 69.6±1.9 75.0±2.9 75.4±1.4 73.8±1.5 71.2±1.0 75.5±1.6
70.8±3.6 71.6±2.5 72.7±2.0 68.5±2.8 72.2±1.6 75.1±1.1 73.3±1.7
140a 160ab 180ab Juneb 60 80 100 120 140 160 180 Juneb 60b 80ab 100date a 3/ Planting 120 ab Seeding Rate 140a 4 (thousands) 160a 180a Juneab 60d 60 80c 80 100b 100 120b 120 140 140 ab 160 160a 180 180a Juneba 60b 80b 100a 120ab a 120 140a 160ab 180ab Juneba 60 80 100 120 140 160
67.6±1.1 67.5±1.0 67.2±1.9
66.6±0.9 70.2±1.0 68.1±1.2
66.6±1.7 67.0±0.8 66.4±0.7
51.2±2.4 54.3±2.1 52.1±1.3 56.7±1.6 58.8±3.3 58.2±2.0 59.1±2.0
48.5±2.3 55.8±1.5 55.9±1.4 57.2±1.1 56.7±2.9 57.4±0.8 61.9±1.6
46.1±1.0 50.1±1.7 51.8±1.2 56.5±0.9 54.8±1.2 58.8±1.0 60.9±1.4
2017 Yield: Northeast Farm Brookingsc
Beresfordb
Year1/ Location2
2016 a 2017b South South Shore Shoreca
Volgaac Volga
Brookingscc Brookings
74.3±1.5 73.7±1.6 76.1±1.4 72.9±1.8 73.2±1.2 72.0±1.0 69.2±1.3 72.3±0.8 75.6±2.1 Yield by treatment (bushels/acre) 69.4±2.4 74.8±2.2 71.6±1.3 72.7±2.2 73.4±1.3 75.7±1.3 73.2±1.3 71.3±1.3 71.7±1.0+ Untreated Fungicide Fungicide Insecticide 73.1±1.3 74.6±1.8 73.5±2.1
63.4±2.2 66.5±1.6 58.0±2.5 64.6±2.4 55.6±1.4 71.6±1.6 57.3±3.0 73.7±1.5 54.6±1.8 74.8±1.2 76.9±1.2 50.4±1.9 77.6±1.7 54.6±3.1
Average:81.6±1.5 72.2 51.8±1.7 53.1±1.2 84.5±1.9 53.0±1.1 83.2±1.3 53.1±1.0 82.9±2.0 56.7±2.2 84.4±1.2 58.1±1.3 84.0±1.4 57.6±1.5 82.3±1.3
62.8±4.0 65.2±1.6 57.3±2.6 69.6±1.5 58.3±2.6 72.4±1.8 57.6±2.7 76.1±1.6 53.9±0.9 76.9±1.7 80.0±1.1 54.6±2.4 78.5±1.3 53.1±1.8
63.8
52.3±1.6 80.1±1.2 57.4±3.0 82.6±1.2 56.9±1.5 84.0±1.0 54.4±2.0 82.7±1.4 56.3±2.0 81.9±1.8 58.6±1.6 82.1±1.2 54.9±1.9 83.2±0.9
59.7±2.0 68.3±0.9 58.0±1.7 74.6±1.3 53.5±1.7 73.3±1.2 55.5±2.6 74.7±1.2 56.7±2.7 75.3±0.7 75.4±1.9 53.7±2.6 77.2±1.9 54.5±1.8
74.1
55.2±1.1 79.9±1.0 59.1±1.6 81.5±1.8 55.4±1.6 83.9±1.7 59.0±1.3 83.7±1.5 57.8±2.8 82.0±1.3 57.3±1.7 82.2±1.8 57.6±1.7 84.2±1.6
1.9 bu/acre increase
46.1±3.1 70.4±2.5 51.7±4.4 70.1±1.0 55.0±3.9 73.8±2.2 49.9±3.3 76.2±0.4 61.0±3.4 73.1±1.6 56.9±3.4 73.6±1.1
49.1±3.5 51.8±4.8 73.9±2.3 70.8±3.6 55.5±3.8 52.9±2.8 69.6±1.9 71.6±2.5 58.7±3.3 50.5±2.8 75.0±2.9 72.7±2.0 59.1±4.4 56.2±4.4 75.4±1.4 68.5±2.8 55.4±3.9 56.2±5.4 ® 73.8±1.5 72.2±1.6 w71.2±1.0 w w. i G r o75.1±1.1 w. o r g 56.8±4.6 66.1±3.0
59.5±5.2 62.9±1.6 64.2±1.9 60.3±3.0 63.7±3.8 66.5±3.8 66.0±2.3 67.0±3.2 68.4±2.4 Yield by treatment (bushels/acre) 60.2±4.1 64.2±2.5 65.9±1.9 68.7±3.2 64.8±3.5 69.0±2.3 61.8±3.7 68.5±1.7 71.0±2.3 + Untreated Fungicide Fungicide Insecticide 68.2±2.2 66.1±2.7 68.5±2.8
70.4±2.3 50.4±2.6 67.8±1.3 61.7±1.4 69.6±1.7 62.5±1.7 67.9±0.6 64.0±1.9 70.2±2.3 65.4±2.1 69.8±1.2 69.5±0.9 67.7±1.4 67.4±1.9
Average:64.9±1.3 63.1 55.9±2.0 58.1±0.9 67.1±1.0 57.8±2.1 69.5±0.8 58.1±1.8 68.8±1.8 58.2±1.3 67.6±1.1 61.0±2.0 67.5±1.0 63.8±2.6 67.2±1.9
69.7±1.6 51.3±1.2 71.5±1.4 59.6±2.3 70.1±1.3 65.0±1.8 71.2±1.1 67.3±1.9 69.7±1.4 67.3±1.4 68.2±1.0 70.5±1.0 68.8±1.6 70.7±1.8
63.9
56.4±2.4 64.3±1.8 55.1±2.1 71.0±1.0 59.6±1.8 65.3±0.8 60.8±1.2 68.5±0.9 59.1±2.4 66.6±0.9 63.7±0.8 70.2±1.0 64.4±1.5 68.1±1.2
70.7±1.0 52.7±1.9 69.6±0.7 57.9±1.7 68.8±1.3 63.1±1.2 69.8±2.5 64.1±0.8 68.7±1.7 65.4±1.6 67.6±1.0 69.3±2.0 70.1±1.3 68.7±2.0
63.0
56.6±2.3 68.7±1.2 59.2±1.4 68.0±1.4 61.3±1.1 66.5±0.5 61.4±2.2 68.4±0.8 61.8±1.7 66.6±1.7 63.1±1.8 67.0±0.8 62.6±1.5 66.4±0.7
62.9±1.2 60.4±3.6 62.7±4.0 51.2±2.4 48.5±2.3 46.1±1.0 59.9±3.3 61.1±4.7 59.4±4.0 54.3±2.1 55.8±1.5 50.1±1.7 56.8±3.1 65.5±2.0 63.9±2.3 52.1±1.3 55.9±1.4 51.8±1.2 64.1±2.1 64.8±2.5 62.7±1.0 56.7±1.6 57.2±1.1 56.5±0.9 61.0±3.4 61.3±3.9 64.9±2.2 58.8±3.3 56.7±2.9 54.8±1.2 © 2015 South Dakota Board of Regents 59.6±3.7 65.3±2.1 62.9±3.6 58.2±2.0 57.4±0.8 58.8±1.0
140a 160a 180a Maya 60ab 80ab 100a 120a 140a 160a 180a Maya 60 80 100 Planting date3/ 120Rate Seeding 4 140 (thousands) 160 180 May Mayba 60d 60 80c 80 100b 100 120ab 120 140a 140 160 160a 180 180a May Mayab 60bb 60 80aa 80 100 100ab a 120 120ab a 140aa 140 160aa 160 180aa 180 Mayab May 60ab b 60 80ab b 80 100 100ab a 120 120ab a 140 140ab a 160 160aa
84.4±1.2 84.0±1.4 82.3±1.3
81.9±1.8 82.1±1.2 83.2±0.9
82.0±1.3 82.2±1.8 84.2±1.6
70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6 73.6±1.1 74.5±1.0
73.9±2.3 69.6±1.9 75.0±2.9 75.4±1.4 73.8±1.5 71.2±1.0 75.5±1.6
70.8±3.6 71.6±2.5 72.7±2.0 68.5±2.8 72.2±1.6 75.1±1.1 73.3±1.7
140a 160ab 180ab Juneb 60 80 100 120 140 160 180 Juneb 60b 80ab 100date a 3/ Planting 120 ab Seeding Rate 140a 4 (thousands) 160a 180a Juneab 60d 60 80c 80 100b 100 120b 120 140 140 ab 160 160a 180 180a Juneba 60b 80b 100a 120ab a 120 140a 160ab 180ab Juneba 60 80 100 120 140 160
67.6±1.1 67.5±1.0 67.2±1.9
66.6±0.9 70.2±1.0 68.1±1.2
66.6±1.7 67.0±0.8 66.4±0.7
51.2±2.4 54.3±2.1 52.1±1.3 56.7±1.6 58.8±3.3 58.2±2.0 59.1±2.0
48.5±2.3 55.8±1.5 55.9±1.4 57.2±1.1 56.7±2.9 57.4±0.8 61.9±1.6
46.1±1.0 50.1±1.7 51.8±1.2 56.5±0.9 54.8±1.2 58.8±1.0 60.9±1.4
2017 Yield: Northeast Farm Brookingsc
Beresfordb
Year1/ Location2
2016 a 2017b South South Shore Shoreca
Volgaac Volga
Brookingscc Brookings
74.3±1.5 73.7±1.6 76.1±1.4 72.9±1.8 73.2±1.2 72.0±1.0 69.2±1.3 72.3±0.8 75.6±2.1 Yield by treatment (bushels/acre) 69.4±2.4 74.8±2.2 71.6±1.3 72.7±2.2 73.4±1.3 75.7±1.3 73.2±1.3 71.3±1.3 71.7±1.0+ Untreated Fungicide Fungicide Insecticide 73.1±1.3 74.6±1.8 73.5±2.1
63.4±2.2 66.5±1.6 58.0±2.5 64.6±2.4 55.6±1.4 71.6±1.6 57.3±3.0 73.7±1.5 54.6±1.8 74.8±1.2 76.9±1.2 50.4±1.9 77.6±1.7 54.6±3.1
Average:81.6±1.5 72.2 51.8±1.7 53.1±1.2 84.5±1.9 53.0±1.1 83.2±1.3 53.1±1.0 82.9±2.0 56.7±2.2 84.4±1.2 58.1±1.3 84.0±1.4 57.6±1.5 82.3±1.3 46.1±3.1 70.4±2.5 51.7±4.4 70.1±1.0 55.0±3.9 73.8±2.2 49.9±3.3 76.2±0.4 61.0±3.4 73.1±1.6 56.9±3.4 73.6±1.1
62.8±4.0 65.2±1.6 57.3±2.6 69.6±1.5 58.3±2.6 72.4±1.8 57.6±2.7 76.1±1.6 53.9±0.9 76.9±1.7 80.0±1.1 54.6±2.4 78.5±1.3 53.1±1.8
63.8
52.3±1.6 80.1±1.2 57.4±3.0 82.6±1.2 56.9±1.5 84.0±1.0 54.4±2.0 82.7±1.4 56.3±2.0 81.9±1.8 58.6±1.6 82.1±1.2 54.9±1.9 83.2±0.9
59.7±2.0 68.3±0.9 58.0±1.7 74.6±1.3 53.5±1.7 73.3±1.2 55.5±2.6 74.7±1.2 56.7±2.7 75.3±0.7 75.4±1.9 53.7±2.6 77.2±1.9 54.5±1.8
74.1
55.2±1.1 79.9±1.0 59.1±1.6 81.5±1.8 55.4±1.6 83.9±1.7 59.0±1.3 83.7±1.5 57.8±2.8 82.0±1.3 57.3±1.7 82.2±1.8 57.6±1.7 84.2±1.6
49.1±3.5 51.8±4.8 73.9±2.3 70.8±3.6 55.5±3.8 52.9±2.8 69.6±1.9 71.6±2.5 58.7±3.3 50.5±2.8 75.0±2.9 72.7±2.0 59.1±4.4 56.2±4.4 75.4±1.4 68.5±2.8 55.4±3.9 56.2±5.4 ® 73.8±1.5 72.2±1.6 w71.2±1.0 w w. i G r o75.1±1.1 w. o r g 56.8±4.6 66.1±3.0
59.5±5.2 62.9±1.6 64.2±1.9 60.3±3.0 63.7±3.8 66.5±3.8 66.0±2.3 67.0±3.2 68.4±2.4 Yield by treatment (bushels/acre) 60.2±4.1 64.2±2.5 65.9±1.9 68.7±3.2 64.8±3.5 69.0±2.3 61.8±3.7 68.5±1.7 71.0±2.3 + Untreated Fungicide Fungicide Insecticide 68.2±2.2 66.1±2.7 68.5±2.8
70.4±2.3 50.4±2.6 67.8±1.3 61.7±1.4 69.6±1.7 62.5±1.7 67.9±0.6 64.0±1.9 70.2±2.3 65.4±2.1 69.8±1.2 69.5±0.9 67.7±1.4 67.4±1.9
Average:64.9±1.3 63.1 55.9±2.0 58.1±0.9 67.1±1.0 57.8±2.1 69.5±0.8 58.1±1.8 68.8±1.8 58.2±1.3 67.6±1.1 61.0±2.0 67.5±1.0 63.8±2.6 67.2±1.9
69.7±1.6 51.3±1.2 71.5±1.4 59.6±2.3 70.1±1.3 65.0±1.8 71.2±1.1 67.3±1.9 69.7±1.4 67.3±1.4 68.2±1.0 70.5±1.0 68.8±1.6 70.7±1.8
63.9
56.4±2.4 64.3±1.8 55.1±2.1 71.0±1.0 59.6±1.8 65.3±0.8 60.8±1.2 68.5±0.9 59.1±2.4 66.6±0.9 63.7±0.8 70.2±1.0 64.4±1.5 68.1±1.2
70.7±1.0 52.7±1.9 69.6±0.7 57.9±1.7 68.8±1.3 63.1±1.2 69.8±2.5 64.1±0.8 68.7±1.7 65.4±1.6 67.6±1.0 69.3±2.0 70.1±1.3 68.7±2.0
63.0
56.6±2.3 68.7±1.2 59.2±1.4 68.0±1.4 61.3±1.1 66.5±0.5 61.4±2.2 68.4±0.8 61.8±1.7 66.6±1.7 63.1±1.8 67.0±0.8 62.6±1.5 66.4±0.7
62.9±1.2 60.4±3.6 62.7±4.0 51.2±2.4 48.5±2.3 46.1±1.0 59.9±3.3 61.1±4.7 59.4±4.0 54.3±2.1 55.8±1.5 50.1±1.7 56.8±3.1 65.5±2.0 63.9±2.3 52.1±1.3 55.9±1.4 51.8±1.2 64.1±2.1 64.8±2.5 62.7±1.0 56.7±1.6 57.2±1.1 56.5±0.9 61.0±3.4 61.3±3.9 64.9±2.2 58.8±3.3 56.7±2.9 54.8±1.2 © 2015 South Dakota Board of Regents 59.6±3.7 65.3±2.1 62.9±3.6 58.2±2.0 57.4±0.8 58.8±1.0
140a 160a 180a Maya 60ab 80ab 100a 120a 140a 160a 180a Maya 60 80 100 Planting date3/ 120Rate Seeding 4 140 (thousands) 160 180 May Mayba 60d 60 80c 80 100b 100 120ab 120 140a 140 160 160a 180 180a May Mayab 60bb 60 80aa 80 100 100ab a 120 120ab a 140aa 140 160aa 160 180aa 180 Mayab May 60ab b 60 80ab b 80 100 100ab a 120 120ab a 140 140ab a 160 160aa
84.4±1.2 84.0±1.4 82.3±1.3
81.9±1.8 82.1±1.2 83.2±0.9
82.0±1.3 82.2±1.8 84.2±1.6
70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6 73.6±1.1 74.5±1.0
73.9±2.3 69.6±1.9 75.0±2.9 75.4±1.4 73.8±1.5 71.2±1.0 75.5±1.6
70.8±3.6 71.6±2.5 72.7±2.0 68.5±2.8 72.2±1.6 75.1±1.1 73.3±1.7
140a 160ab 180ab Juneb 60 80 100 120 140 160 180 Juneb 60b 80ab 100date a 3/ Planting 120 ab Seeding Rate 140a 4 (thousands) 160a 180a Juneab 60d 60 80c 80 100b 100 120b 120 140 140 ab 160 160a 180 180a Juneba 60b 80b 100a 120ab a 120 140a 160ab 180ab Juneba 60 80 100 120 140 160
67.6±1.1 67.5±1.0 67.2±1.9
66.6±0.9 70.2±1.0 68.1±1.2
66.6±1.7 67.0±0.8 66.4±0.7
51.2±2.4 54.3±2.1 52.1±1.3 56.7±1.6 58.8±3.3 58.2±2.0 59.1±2.0
48.5±2.3 55.8±1.5 55.9±1.4 57.2±1.1 56.7±2.9 57.4±0.8 61.9±1.6
46.1±1.0 50.1±1.7 51.8±1.2 56.5±0.9 54.8±1.2 58.8±1.0 60.9±1.4
2017 Yield: Northeast Farm Brookingsc
Beresfordb
Year1/ Location2
2016 a 2017b South South Shore Shoreca
Volgaac Volga
Brookingscc Brookings
74.3±1.5 73.7±1.6 76.1±1.4 72.9±1.8 73.2±1.2 72.0±1.0 69.2±1.3 72.3±0.8 75.6±2.1 Yield by treatment (bushels/acre) 69.4±2.4 74.8±2.2 71.6±1.3 72.7±2.2 73.4±1.3 75.7±1.3 73.2±1.3 71.3±1.3 71.7±1.0+ Untreated Fungicide Fungicide Insecticide 73.1±1.3 74.6±1.8 73.5±2.1
63.4±2.2 66.5±1.6 58.0±2.5 64.6±2.4 55.6±1.4 71.6±1.6 57.3±3.0 73.7±1.5 54.6±1.8 74.8±1.2 76.9±1.2 50.4±1.9 77.6±1.7 54.6±3.1
Average:81.6±1.5 72.2 51.8±1.7 53.1±1.2 84.5±1.9 53.0±1.1 83.2±1.3 53.1±1.0 82.9±2.0 56.7±2.2 84.4±1.2 58.1±1.3 84.0±1.4 57.6±1.5 82.3±1.3 46.1±3.1 70.4±2.5 51.7±4.4 70.1±1.0 55.0±3.9 73.8±2.2 49.9±3.3 76.2±0.4 61.0±3.4 73.1±1.6 56.9±3.4 73.6±1.1
62.8±4.0 65.2±1.6 57.3±2.6 69.6±1.5 58.3±2.6 72.4±1.8 57.6±2.7 76.1±1.6 53.9±0.9 76.9±1.7 80.0±1.1 54.6±2.4 78.5±1.3 53.1±1.8
63.8
52.3±1.6 80.1±1.2 57.4±3.0 82.6±1.2 56.9±1.5 84.0±1.0 54.4±2.0 82.7±1.4 56.3±2.0 81.9±1.8 58.6±1.6 82.1±1.2 54.9±1.9 83.2±0.9
59.7±2.0 68.3±0.9 58.0±1.7 74.6±1.3 53.5±1.7 73.3±1.2 55.5±2.6 74.7±1.2 56.7±2.7 75.3±0.7 75.4±1.9 53.7±2.6 77.2±1.9 54.5±1.8
74.1
55.2±1.1 79.9±1.0 59.1±1.6 81.5±1.8 55.4±1.6 83.9±1.7 59.0±1.3 83.7±1.5 57.8±2.8 82.0±1.3 57.3±1.7 82.2±1.8 57.6±1.7 84.2±1.6
49.1±3.5 51.8±4.8 73.9±2.3 70.8±3.6 55.5±3.8 52.9±2.8 69.6±1.9 71.6±2.5 58.7±3.3 50.5±2.8 75.0±2.9 72.7±2.0 59.1±4.4 56.2±4.4 75.4±1.4 68.5±2.8 55.4±3.9 56.2±5.4 ® 73.8±1.5 72.2±1.6 w71.2±1.0 w w. i G r o75.1±1.1 w. o r g 56.8±4.6 66.1±3.0
59.5±5.2 62.9±1.6 64.2±1.9 60.3±3.0 63.7±3.8 66.5±3.8 66.0±2.3 67.0±3.2 68.4±2.4 Yield by treatment (bushels/acre) 60.2±4.1 64.2±2.5 65.9±1.9 68.7±3.2 64.8±3.5 69.0±2.3 61.8±3.7 68.5±1.7 71.0±2.3 + Untreated Fungicide Fungicide Insecticide 68.2±2.2 66.1±2.7 68.5±2.8
70.4±2.3 50.4±2.6 67.8±1.3 61.7±1.4 69.6±1.7 62.5±1.7 67.9±0.6 64.0±1.9 70.2±2.3 65.4±2.1 69.8±1.2 69.5±0.9 67.7±1.4 67.4±1.9
Average:64.9±1.3 63.1 55.9±2.0 58.1±0.9 67.1±1.0 57.8±2.1 69.5±0.8 58.1±1.8 68.8±1.8 58.2±1.3 67.6±1.1 61.0±2.0 67.5±1.0 63.8±2.6 67.2±1.9
69.7±1.6 51.3±1.2 71.5±1.4 59.6±2.3 70.1±1.3 65.0±1.8 71.2±1.1 67.3±1.9 69.7±1.4 67.3±1.4 68.2±1.0 70.5±1.0 68.8±1.6 70.7±1.8
63.9
56.4±2.4 64.3±1.8 55.1±2.1 71.0±1.0 59.6±1.8 65.3±0.8 60.8±1.2 68.5±0.9 59.1±2.4 66.6±0.9 63.7±0.8 70.2±1.0 64.4±1.5 68.1±1.2
70.7±1.0 52.7±1.9 69.6±0.7 57.9±1.7 68.8±1.3 63.1±1.2 69.8±2.5 64.1±0.8 68.7±1.7 65.4±1.6 67.6±1.0 69.3±2.0 70.1±1.3 68.7±2.0
63.0
56.6±2.3 68.7±1.2 59.2±1.4 68.0±1.4 61.3±1.1 66.5±0.5 61.4±2.2 68.4±0.8 61.8±1.7 66.6±1.7 63.1±1.8 67.0±0.8 62.6±1.5 66.4±0.7
62.9±1.2 60.4±3.6 62.7±4.0 51.2±2.4 48.5±2.3 46.1±1.0 59.9±3.3 61.1±4.7 59.4±4.0 54.3±2.1 55.8±1.5 50.1±1.7 56.8±3.1 65.5±2.0 63.9±2.3 52.1±1.3 55.9±1.4 51.8±1.2 64.1±2.1 64.8±2.5 62.7±1.0 56.7±1.6 57.2±1.1 56.5±0.9 61.0±3.4 61.3±3.9 64.9±2.2 58.8±3.3 56.7±2.9 54.8±1.2 © 2015 South Dakota Board of Regents 59.6±3.7 65.3±2.1 62.9±3.6 58.2±2.0 57.4±0.8 58.8±1.0
160a 180a Maya 60 80 100 120 140 160 180 Maya 60d 80c 100date b 3/ Planting 120 ab Seeding Rate 140a 4 (thousands) 160a 180a Maybb May 60 60b 80 80a 100 100ab 120 120ab 140 140a 160 160a 180 180a Mayab May 60bb 60 80ab 80 100 100ab a 120 120ab a 140 140ab a 160 160aa 180 180ab a Mayaa May 60ab b 60 80 a 80ab 100 100aa 120aa 120 140aa 140 160aa 160 180a
73.6±1.1 74.5±1.0
71.2±1.0 75.5±1.6
75.1±1.1 73.3±1.7
74.3±1.5 72.9±1.8 69.2±1.3 69.4±2.4 72.7±2.2 73.2±1.3 73.1±1.3
73.7±1.6 73.2±1.2 72.3±0.8 74.8±2.2 73.4±1.3 71.3±1.3 74.6±1.8
76.1±1.4 72.0±1.0 75.6±2.1 71.6±1.3 75.7±1.3 71.7±1.0 73.5±2.1
160 180 Juneb 60b 80ab 100a 120ab 140a 160a 180a Juneb 60d 80c 100date b 3/ Planting 120 Seeding bRate 140ab 4 (thousands) 160a 180a Juneaa June 60 60b 80 80b 100 100a 120 120a 140 140a 160 ab 160 180 ab 180 Juneba June 60b 60 80b 80 100 100a 120 120 ab 140a 140 160 160 ab 180 180 ab Junebb June 60 60 80 80 100 100 120 120 140 140 160 160 180
2017 Yield: Volga Farm Beresfordb
2017b South Shorea
Year1/ Location2
2016a Volga c c South Shore
Brookings Volgaa c
Beresfordcb Brookings
66.5±1.6 65.2±1.6 68.3±0.9 64.6±2.4 69.6±1.5 74.6±1.3 71.6±1.6 72.4±1.8 73.3±1.2 Yield by treatment (bushels/acre) 73.7±1.5 76.1±1.6 74.7±1.2 74.8±1.2 76.9±1.7 75.3±0.7 76.9±1.2 80.0±1.1 75.4±1.9+ Untreated Fungicide Fungicide 77.6±1.7 78.5±1.3 77.2±1.9 Insecticide 51.8±1.7 63.4±2.2 53.1±1.2 58.0±2.5 53.0±1.1 55.6±1.4 53.1±1.0 57.3±3.0 56.7±2.2 54.6±1.8 58.1±1.3 50.4±1.9 57.6±1.5 54.6±3.1
52.3±1.6 62.8±4.0 57.4±3.0 57.3±2.6 56.9±1.5 58.3±2.6 54.4±2.0 57.6±2.7 56.3±2.0 53.9±0.9 58.6±1.6 54.6±2.4 54.9±1.9 53.1±1.8
55.2±1.1 59.7±2.0 59.1±1.6 58.0±1.7 55.4±1.6 53.5±1.7 59.0±1.3 55.5±2.6 57.8±2.8 56.7±2.7 57.3±1.7 53.7±2.6 57.6±1.7 54.5±1.8
46.1±3.1 Average:81.6±1.5 54.8
49.1±3.5 80.1±1.2 55.5±3.8 82.6±1.2 58.7±3.3 84.0±1.0 59.1±4.4 82.7±1.4 55.4±3.9 81.9±1.8 56.8±4.6 82.1±1.2 64.8±3.0 83.2±0.9
55.8
51.8±4.8 79.9±1.0 52.9±2.8 81.5±1.8 50.5±2.8 83.9±1.7 56.2±4.4 83.7±1.5 56.2±5.4 82.0±1.3 66.1±3.0 82.2±1.8 55.9±3.5 84.2±1.6
51.7±4.4 84.5±1.9 55.0±3.9 83.2±1.3 49.9±3.3 82.9±2.0 61.0±3.4 84.4±1.2 56.9±3.4 84.0±1.4 57.3±3.1 82.3±1.3
57.3
2.5 bu/acre increase
50.0±3.5 70.4±2.5 62.2±3.1 70.1±1.0 61.8±3.8 73.8±2.2 63.8±3.0 76.2±0.4 64.4±2.1 73.1±1.6 66.5±2.5 73.6±1.1 66.1±3.7
55.1±3.1 57.1±6.2 73.9±2.3 70.8±3.6 64.2±5.3 66.0±2.7 69.6±1.9 71.6±2.5 54.1±10.1 69.9±3.0 75.0±2.9 72.7±2.0 66.7±1.4 67.4±2.5 75.4±1.4 68.5±2.8 67.1±1.7 65.9±3.2 73.8±1.5 72.2±1.6 67.8±2.7 70.3±2.0 w71.2±1.0 w w. i G r o75.1±1.1 w. o r g ® 69.0±2.5 67.8±1.3
58.2±2.0 59.1±2.0
57.4±0.8 61.9±1.6
58.8±1.0 60.9±1.4
59.5±5.2 60.3±3.0 66.0±2.3 60.2±4.1 68.7±3.2 61.8±3.7 68.2±2.2
62.9±1.6 63.7±3.8 67.0±3.2 64.2±2.5 64.8±3.5 68.5±1.7 66.1±2.7
64.2±1.9 66.5±3.8 68.4±2.4 65.9±1.9 69.0±2.3 71.0±2.3 68.5±2.8
50.4±2.6 51.3±1.2 52.7±1.9 61.7±1.4 59.6±2.3 57.9±1.7 62.5±1.7 65.0±1.8 63.1±1.2 Yield by treatment (bushels/acre) 64.0±1.9 67.3±1.9 64.1±0.8 65.4±2.1 67.3±1.4 65.4±1.6 69.8±1.2 68.2±1.0 67.6±1.0 + Untreated Fungicide Fungicide 67.7±1.4 68.8±1.6 70.1±1.3 Insecticide 55.9±2.0 70.4±2.3 58.1±0.9 67.8±1.3 57.8±2.1 69.6±1.7 58.1±1.8 67.9±0.6 58.2±1.3 70.2±2.3 61.0±2.0 69.5±0.9 63.8±2.6 67.4±1.9
56.4±2.4 69.7±1.6 55.1±2.1 71.5±1.4 59.6±1.8 70.1±1.3 60.8±1.2 71.2±1.1 59.1±2.4 69.7±1.4 63.7±0.8 70.5±1.0 64.4±1.5 70.7±1.8
56.6±2.3 70.7±1.0 59.2±1.4 69.6±0.7 61.3±1.1 68.8±1.3 61.4±2.2 69.8±2.5 61.8±1.7 68.7±1.7 63.1±1.8 69.3±2.0 62.6±1.5 68.7±2.0
62.9±1.2 Average:64.9±1.3 59.0
60.4±3.6 64.3±1.8 61.1±4.7 71.0±1.0 65.5±2.0 65.3±0.8 64.8±2.5 68.5±0.9 61.3±3.9 66.6±0.9 65.3±2.1 70.2±1.0 65.5±3.6 68.1±1.2
59.9
62.7±4.0 68.7±1.2 59.4±4.0 68.0±1.4 63.9±2.3 66.5±0.5 62.7±1.0 68.4±0.8 64.9±2.2 66.6±1.7 62.9±3.6 67.0±0.8 59.8±4.1 66.4±0.7
59.9±3.3 67.1±1.0 56.8±3.1 69.5±0.8 64.1±2.1 68.8±1.8 61.0±3.4 67.6±1.1 59.6±3.7 67.5±1.0 60.3±4.5 67.2±1.9
60.9
1.9 bu/acre increase
58.7±1.4 58.1±2.0 56.3±1.6 51.2±2.4 48.5±2.3 46.1±1.0 50.5±9.1 55.8±2.3 59.1±1.3 54.3±2.1 55.8±1.5 50.1±1.7 61.3±1.5 58.2±1.5 57.1±1.2 52.1±1.3 55.9±1.4 51.8±1.2 56.4±3.9 59.0±1.1 61.3±1.5 56.7±1.6 57.2±1.1 56.5±0.9 57.1±1.0 57.0±1.5 60.2±1.5 58.8±3.3 56.7±2.9 54.8±1.2 56.7±0.9 56.7±1.6 60.1±1.5 58.2±2.0 57.4±0.8Board of 58.8±1.0 © 2015 South Dakota Regents 59.0±1.3 58.6±1.1 62.3±0.7
160a 180a Maya 60 80 100 120 140 160 180 Maya 60d 80c 100date b 3/ Planting 120 ab Seeding Rate 140a 4 (thousands) 160a 180a Maybb May 60 60b 80 80a 100 100ab 120 120ab 140 140a 160 160a 180 180a Mayab May 60bb 60 80ab 80 100 100ab a 120 120ab a 140 140ab a 160 160aa 180 180ab a Mayaa May 60ab b 60 80 a 80ab 100 100aa 120aa 120 140aa 140 160aa 160 180a
73.6±1.1 74.5±1.0
71.2±1.0 75.5±1.6
75.1±1.1 73.3±1.7
74.3±1.5 72.9±1.8 69.2±1.3 69.4±2.4 72.7±2.2 73.2±1.3 73.1±1.3
73.7±1.6 73.2±1.2 72.3±0.8 74.8±2.2 73.4±1.3 71.3±1.3 74.6±1.8
76.1±1.4 72.0±1.0 75.6±2.1 71.6±1.3 75.7±1.3 71.7±1.0 73.5±2.1
160 180 Juneb 60b 80ab 100a 120ab 140a 160a 180a Juneb 60d 80c 100date b 3/ Planting 120 Seeding bRate 140ab 4 (thousands) 160a 180a Juneaa June 60 60b 80 80b 100 100a 120 120a 140 140a 160 ab 160 180 ab 180 Juneba June 60b 60 80b 80 100 100a 120 120 ab 140a 140 160 160 ab 180 180 ab Junebb June 60 60 80 80 100 100 120 120 140 140 160 160 180
2017 Yield: Volga Farm Beresfordb
2017b South Shorea
Year1/ Location2
2016a Volga c c South Shore
Brookings Volgaa c
Beresfordcb Brookings
66.5±1.6 65.2±1.6 68.3±0.9 64.6±2.4 69.6±1.5 74.6±1.3 71.6±1.6 72.4±1.8 73.3±1.2 Yield by treatment (bushels/acre) 73.7±1.5 76.1±1.6 74.7±1.2 74.8±1.2 76.9±1.7 75.3±0.7 76.9±1.2 80.0±1.1 75.4±1.9+ Untreated Fungicide Fungicide 77.6±1.7 78.5±1.3 77.2±1.9 Insecticide 51.8±1.7 63.4±2.2 53.1±1.2 58.0±2.5 53.0±1.1 55.6±1.4 53.1±1.0 57.3±3.0 56.7±2.2 54.6±1.8 58.1±1.3 50.4±1.9 57.6±1.5 54.6±3.1
52.3±1.6 62.8±4.0 57.4±3.0 57.3±2.6 56.9±1.5 58.3±2.6 54.4±2.0 57.6±2.7 56.3±2.0 53.9±0.9 58.6±1.6 54.6±2.4 54.9±1.9 53.1±1.8
55.2±1.1 59.7±2.0 59.1±1.6 58.0±1.7 55.4±1.6 53.5±1.7 59.0±1.3 55.5±2.6 57.8±2.8 56.7±2.7 57.3±1.7 53.7±2.6 57.6±1.7 54.5±1.8
46.1±3.1 Average:81.6±1.5 54.8
49.1±3.5 80.1±1.2 55.5±3.8 82.6±1.2 58.7±3.3 84.0±1.0 59.1±4.4 82.7±1.4 55.4±3.9 81.9±1.8 56.8±4.6 82.1±1.2 64.8±3.0 83.2±0.9
55.8
51.8±4.8 79.9±1.0 52.9±2.8 81.5±1.8 50.5±2.8 83.9±1.7 56.2±4.4 83.7±1.5 56.2±5.4 82.0±1.3 66.1±3.0 82.2±1.8 55.9±3.5 84.2±1.6
51.7±4.4 84.5±1.9 55.0±3.9 83.2±1.3 49.9±3.3 82.9±2.0 61.0±3.4 84.4±1.2 56.9±3.4 84.0±1.4 57.3±3.1 82.3±1.3 50.0±3.5 70.4±2.5 62.2±3.1 70.1±1.0 61.8±3.8 73.8±2.2 63.8±3.0 76.2±0.4 64.4±2.1 73.1±1.6 66.5±2.5 73.6±1.1 66.1±3.7
57.3
55.1±3.1 57.1±6.2 73.9±2.3 70.8±3.6 64.2±5.3 66.0±2.7 69.6±1.9 71.6±2.5 54.1±10.1 69.9±3.0 75.0±2.9 72.7±2.0 66.7±1.4 67.4±2.5 75.4±1.4 68.5±2.8 67.1±1.7 65.9±3.2 73.8±1.5 72.2±1.6 67.8±2.7 70.3±2.0 w71.2±1.0 w w. i G r o75.1±1.1 w. o r g ® 69.0±2.5 67.8±1.3
58.2±2.0 59.1±2.0
57.4±0.8 61.9±1.6
58.8±1.0 60.9±1.4
59.5±5.2 60.3±3.0 66.0±2.3 60.2±4.1 68.7±3.2 61.8±3.7 68.2±2.2
62.9±1.6 63.7±3.8 67.0±3.2 64.2±2.5 64.8±3.5 68.5±1.7 66.1±2.7
64.2±1.9 66.5±3.8 68.4±2.4 65.9±1.9 69.0±2.3 71.0±2.3 68.5±2.8
50.4±2.6 51.3±1.2 52.7±1.9 61.7±1.4 59.6±2.3 57.9±1.7 62.5±1.7 65.0±1.8 63.1±1.2 Yield by treatment (bushels/acre) 64.0±1.9 67.3±1.9 64.1±0.8 65.4±2.1 67.3±1.4 65.4±1.6 69.8±1.2 68.2±1.0 67.6±1.0 + Untreated Fungicide Fungicide 67.7±1.4 68.8±1.6 70.1±1.3 Insecticide 55.9±2.0 70.4±2.3 58.1±0.9 67.8±1.3 57.8±2.1 69.6±1.7 58.1±1.8 67.9±0.6 58.2±1.3 70.2±2.3 61.0±2.0 69.5±0.9 63.8±2.6 67.4±1.9
56.4±2.4 69.7±1.6 55.1±2.1 71.5±1.4 59.6±1.8 70.1±1.3 60.8±1.2 71.2±1.1 59.1±2.4 69.7±1.4 63.7±0.8 70.5±1.0 64.4±1.5 70.7±1.8
56.6±2.3 70.7±1.0 59.2±1.4 69.6±0.7 61.3±1.1 68.8±1.3 61.4±2.2 69.8±2.5 61.8±1.7 68.7±1.7 63.1±1.8 69.3±2.0 62.6±1.5 68.7±2.0
62.9±1.2 Average:64.9±1.3 59.0
60.4±3.6 64.3±1.8 61.1±4.7 71.0±1.0 65.5±2.0 65.3±0.8 64.8±2.5 68.5±0.9 61.3±3.9 66.6±0.9 65.3±2.1 70.2±1.0 65.5±3.6 68.1±1.2
59.9
62.7±4.0 68.7±1.2 59.4±4.0 68.0±1.4 63.9±2.3 66.5±0.5 62.7±1.0 68.4±0.8 64.9±2.2 66.6±1.7 62.9±3.6 67.0±0.8 59.8±4.1 66.4±0.7
59.9±3.3 67.1±1.0 56.8±3.1 69.5±0.8 64.1±2.1 68.8±1.8 61.0±3.4 67.6±1.1 59.6±3.7 67.5±1.0 60.3±4.5 67.2±1.9
60.9
58.7±1.4 58.1±2.0 56.3±1.6 51.2±2.4 48.5±2.3 46.1±1.0 50.5±9.1 55.8±2.3 59.1±1.3 54.3±2.1 55.8±1.5 50.1±1.7 61.3±1.5 58.2±1.5 57.1±1.2 52.1±1.3 55.9±1.4 51.8±1.2 56.4±3.9 59.0±1.1 61.3±1.5 56.7±1.6 57.2±1.1 56.5±0.9 57.1±1.0 57.0±1.5 60.2±1.5 58.8±3.3 56.7±2.9 54.8±1.2 56.7±0.9 56.7±1.6 60.1±1.5 58.2±2.0 57.4±0.8Board of 58.8±1.0 © 2015 South Dakota Regents 59.0±1.3 58.6±1.1 62.3±0.7
160a 180a Maya 60 80 100 120 140 160 180 Maya 60d 80c 100date b 3/ Planting 120 ab Seeding Rate 140a 4 (thousands) 160a 180a Maybb May 60 60b 80 80a 100 100ab 120 120ab 140 140a 160 160a 180 180a Mayab May 60bb 60 80ab 80 100 100ab a 120 120ab a 140 140ab a 160 160aa 180 180ab a Mayaa May 60ab b 60 80 a 80ab 100 100aa 120aa 120 140aa 140 160aa 160 180a
73.6±1.1 74.5±1.0
71.2±1.0 75.5±1.6
75.1±1.1 73.3±1.7
74.3±1.5 72.9±1.8 69.2±1.3 69.4±2.4 72.7±2.2 73.2±1.3 73.1±1.3
73.7±1.6 73.2±1.2 72.3±0.8 74.8±2.2 73.4±1.3 71.3±1.3 74.6±1.8
76.1±1.4 72.0±1.0 75.6±2.1 71.6±1.3 75.7±1.3 71.7±1.0 73.5±2.1
160 180 Juneb 60b 80ab 100a 120ab 140a 160a 180a Juneb 60d 80c 100date b 3/ Planting 120 Seeding bRate 140ab 4 (thousands) 160a 180a Juneaa June 60 60b 80 80b 100 100a 120 120a 140 140a 160 ab 160 180 ab 180 Juneba June 60b 60 80b 80 100 100a 120 120 ab 140a 140 160 160 ab 180 180 ab Junebb June 60 60 80 80 100 100 120 120 140 140 160 160 180
2017 Yield: Volga Farm Beresfordb
2017b South Shorea
Year1/ Location2
2016a Volga c c South Shore
Brookings Volgaa c
Beresfordcb Brookings
66.5±1.6 65.2±1.6 68.3±0.9 64.6±2.4 69.6±1.5 74.6±1.3 71.6±1.6 72.4±1.8 73.3±1.2 Yield by treatment (bushels/acre) 73.7±1.5 76.1±1.6 74.7±1.2 74.8±1.2 76.9±1.7 75.3±0.7 76.9±1.2 80.0±1.1 75.4±1.9+ Untreated Fungicide Fungicide 77.6±1.7 78.5±1.3 77.2±1.9 Insecticide 51.8±1.7 63.4±2.2 53.1±1.2 58.0±2.5 53.0±1.1 55.6±1.4 53.1±1.0 57.3±3.0 56.7±2.2 54.6±1.8 58.1±1.3 50.4±1.9 57.6±1.5 54.6±3.1
52.3±1.6 62.8±4.0 57.4±3.0 57.3±2.6 56.9±1.5 58.3±2.6 54.4±2.0 57.6±2.7 56.3±2.0 53.9±0.9 58.6±1.6 54.6±2.4 54.9±1.9 53.1±1.8
55.2±1.1 59.7±2.0 59.1±1.6 58.0±1.7 55.4±1.6 53.5±1.7 59.0±1.3 55.5±2.6 57.8±2.8 56.7±2.7 57.3±1.7 53.7±2.6 57.6±1.7 54.5±1.8
46.1±3.1 Average:81.6±1.5 54.8
49.1±3.5 80.1±1.2 55.5±3.8 82.6±1.2 58.7±3.3 84.0±1.0 59.1±4.4 82.7±1.4 55.4±3.9 81.9±1.8 56.8±4.6 82.1±1.2 64.8±3.0 83.2±0.9
55.8
51.8±4.8 79.9±1.0 52.9±2.8 81.5±1.8 50.5±2.8 83.9±1.7 56.2±4.4 83.7±1.5 56.2±5.4 82.0±1.3 66.1±3.0 82.2±1.8 55.9±3.5 84.2±1.6
51.7±4.4 84.5±1.9 55.0±3.9 83.2±1.3 49.9±3.3 82.9±2.0 61.0±3.4 84.4±1.2 56.9±3.4 84.0±1.4 57.3±3.1 82.3±1.3 50.0±3.5 70.4±2.5 62.2±3.1 70.1±1.0 61.8±3.8 73.8±2.2 63.8±3.0 76.2±0.4 64.4±2.1 73.1±1.6 66.5±2.5 73.6±1.1 66.1±3.7
57.3
55.1±3.1 57.1±6.2 73.9±2.3 70.8±3.6 64.2±5.3 66.0±2.7 69.6±1.9 71.6±2.5 54.1±10.1 69.9±3.0 75.0±2.9 72.7±2.0 66.7±1.4 67.4±2.5 75.4±1.4 68.5±2.8 67.1±1.7 65.9±3.2 73.8±1.5 72.2±1.6 67.8±2.7 70.3±2.0 w71.2±1.0 w w. i G r o75.1±1.1 w. o r g ® 69.0±2.5 67.8±1.3
58.2±2.0 59.1±2.0
57.4±0.8 61.9±1.6
58.8±1.0 60.9±1.4
59.5±5.2 60.3±3.0 66.0±2.3 60.2±4.1 68.7±3.2 61.8±3.7 68.2±2.2
62.9±1.6 63.7±3.8 67.0±3.2 64.2±2.5 64.8±3.5 68.5±1.7 66.1±2.7
64.2±1.9 66.5±3.8 68.4±2.4 65.9±1.9 69.0±2.3 71.0±2.3 68.5±2.8
50.4±2.6 51.3±1.2 52.7±1.9 61.7±1.4 59.6±2.3 57.9±1.7 62.5±1.7 65.0±1.8 63.1±1.2 Yield by treatment (bushels/acre) 64.0±1.9 67.3±1.9 64.1±0.8 65.4±2.1 67.3±1.4 65.4±1.6 69.8±1.2 68.2±1.0 67.6±1.0 + Untreated Fungicide Fungicide 67.7±1.4 68.8±1.6 70.1±1.3 Insecticide 55.9±2.0 70.4±2.3 58.1±0.9 67.8±1.3 57.8±2.1 69.6±1.7 58.1±1.8 67.9±0.6 58.2±1.3 70.2±2.3 61.0±2.0 69.5±0.9 63.8±2.6 67.4±1.9
56.4±2.4 69.7±1.6 55.1±2.1 71.5±1.4 59.6±1.8 70.1±1.3 60.8±1.2 71.2±1.1 59.1±2.4 69.7±1.4 63.7±0.8 70.5±1.0 64.4±1.5 70.7±1.8
56.6±2.3 70.7±1.0 59.2±1.4 69.6±0.7 61.3±1.1 68.8±1.3 61.4±2.2 69.8±2.5 61.8±1.7 68.7±1.7 63.1±1.8 69.3±2.0 62.6±1.5 68.7±2.0
62.9±1.2 Average:64.9±1.3 59.0
60.4±3.6 64.3±1.8 61.1±4.7 71.0±1.0 65.5±2.0 65.3±0.8 64.8±2.5 68.5±0.9 61.3±3.9 66.6±0.9 65.3±2.1 70.2±1.0 65.5±3.6 68.1±1.2
59.9
62.7±4.0 68.7±1.2 59.4±4.0 68.0±1.4 63.9±2.3 66.5±0.5 62.7±1.0 68.4±0.8 64.9±2.2 66.6±1.7 62.9±3.6 67.0±0.8 59.8±4.1 66.4±0.7
59.9±3.3 67.1±1.0 56.8±3.1 69.5±0.8 64.1±2.1 68.8±1.8 61.0±3.4 67.6±1.1 59.6±3.7 67.5±1.0 60.3±4.5 67.2±1.9
60.9
58.7±1.4 58.1±2.0 56.3±1.6 51.2±2.4 48.5±2.3 46.1±1.0 50.5±9.1 55.8±2.3 59.1±1.3 54.3±2.1 55.8±1.5 50.1±1.7 61.3±1.5 58.2±1.5 57.1±1.2 52.1±1.3 55.9±1.4 51.8±1.2 56.4±3.9 59.0±1.1 61.3±1.5 56.7±1.6 57.2±1.1 56.5±0.9 57.1±1.0 57.0±1.5 60.2±1.5 58.8±3.3 56.7±2.9 54.8±1.2 56.7±0.9 56.7±1.6 60.1±1.5 58.2±2.0 57.4±0.8Board of 58.8±1.0 © 2015 South Dakota Regents 59.0±1.3 58.6±1.1 62.3±0.7
160 180 Maya 60d 80c 100b 120ab 140a 160a 180a Mayb 60b 80a 100 Planting ab date3/ 120 ab Seeding Rate 140a 4 (thousands) 160a 180a Maybb May 60 60b 80 80b 100 100ab 120 120ab 140 140ab 160 160a 180 180ab Mayaa May 60bb 60 80aa 80 100aa 100 120aa 120 140aa 140 160aa 160 180aa 180 Maya 60ab 80ab 100a 120a 140a 160a
73.2±1.3 73.1±1.3
71.3±1.3 74.6±1.8
71.7±1.0 73.5±2.1
66.5±1.6 64.6±2.4 71.6±1.6 73.7±1.5 74.8±1.2 76.9±1.2 77.6±1.7
65.2±1.6 69.6±1.5 72.4±1.8 76.1±1.6 76.9±1.7 80.0±1.1 78.5±1.3
68.3±0.9 74.6±1.3 73.3±1.2 74.7±1.2 75.3±0.7 75.4±1.9 77.2±1.9
160a 180a Juneb 60d 80c 100b 120b 140ab 160a 180a Junea 60b 80b 100 a 3/ Planting date 120 Seeding aRate 140a 4 (thousands) 160ab 180ab Junea 60 80 100 120 140 160 180 Juneb 60b 60 80b 80 100a 100 120 120 ab 140 140a 160 160 ab 180 180 ab Juneb 60 80 100 120 140 160
61.8±3.7 68.2±2.2
68.5±1.7 66.1±2.7
71.0±2.3 68.5±2.8
50.4±2.6 61.7±1.4 62.5±1.7 64.0±1.9 65.4±2.1 69.8±1.2 67.7±1.4
51.3±1.2 59.6±2.3 65.0±1.8 67.3±1.9 67.3±1.4 68.2±1.0 68.8±1.6
52.7±1.9 57.9±1.7 63.1±1.2 64.1±0.8 65.4±1.6 67.6±1.0 70.1±1.3
2017 Yield: Brookings Farm 2017b South Shorea
Volgac
Year1/ Location2
2016a Brookings South Shorecc
Beresford Volgaa b
Brookingsc
51.8±1.7 52.3±1.6 55.2±1.1 53.1±1.2 57.4±3.0 59.1±1.6 53.0±1.1 56.9±1.5 55.4±1.6 Yield by treatment (bushels/acre) 53.1±1.0 54.4±2.0 59.0±1.3 56.7±2.2 56.3±2.0 57.8±2.8 58.1±1.3 58.6±1.6 57.3±1.7+ Untreated Fungicide Fungicide 57.6±1.5 54.9±1.9 57.6±1.7 Insecticide 46.1±3.1 63.4±2.2 51.7±4.4 58.0±2.5 55.0±3.9 55.6±1.4 49.9±3.3 57.3±3.0 61.0±3.4 54.6±1.8 56.9±3.4 50.4±1.9 57.3±3.1 54.6±3.1
49.1±3.5 62.8±4.0 55.5±3.8 57.3±2.6 58.7±3.3 58.3±2.6 59.1±4.4 57.6±2.7 55.4±3.9 53.9±0.9 56.8±4.6 54.6±2.4 64.8±3.0 53.1±1.8
51.8±4.8 59.7±2.0 52.9±2.8 58.0±1.7 50.5±2.8 53.5±1.7 56.2±4.4 55.5±2.6 56.2±5.4 56.7±2.7 66.1±3.0 53.7±2.6 55.9±3.5 54.5±1.8
50.0±3.5 Average:81.6±1.5 54.0
55.1±3.1 80.1±1.2 64.2±5.3 82.6±1.2 54.1±10.1 84.0±1.0 66.7±1.4 82.7±1.4 67.1±1.7 81.9±1.8 67.8±2.7 82.1±1.2 69.0±2.5 83.2±0.9
57.1
57.1±6.2 79.9±1.0 66.0±2.7 81.5±1.8 69.9±3.0 83.9±1.7 67.4±2.5 83.7±1.5 65.9±3.2 82.0±1.3 70.3±2.0 82.2±1.8 67.8±1.3 84.2±1.6
62.2±3.1 84.5±1.9 61.8±3.8 83.2±1.3 63.8±3.0 82.9±2.0 64.4±2.1 84.4±1.2 66.5±2.5 84.0±1.4 66.1±3.7 82.3±1.3
55.7
1.7 bu/acre increase
70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6 73.6±1.1
73.9±2.3 70.8±3.6 69.6±1.9 71.6±2.5 75.0±2.9 72.7±2.0 75.4±1.4 68.5±2.8 73.8±1.5 72.2±1.6 w71.2±1.0 w w. i G r o75.1±1.1 w. o r g ®
55.9±2.0 56.4±2.4 56.6±2.3 58.1±0.9 55.1±2.1 59.2±1.4 57.8±2.1 59.6±1.8 61.3±1.1 Yield by treatment (bushels/acre) 58.1±1.8 60.8±1.2 61.4±2.2 58.2±1.3 59.1±2.4 61.8±1.7 61.0±2.0 63.7±0.8 63.1±1.8 + Untreated Fungicide Fungicide 63.8±2.6 64.4±1.5 62.6±1.5 Insecticide 62.9±1.2 70.4±2.3 59.9±3.3 67.8±1.3 56.8±3.1 69.6±1.7 64.1±2.1 67.9±0.6 61.0±3.4 70.2±2.3 59.6±3.7 69.5±0.9 60.3±4.5 67.4±1.9
60.4±3.6 69.7±1.6 61.1±4.7 71.5±1.4 65.5±2.0 70.1±1.3 64.8±2.5 71.2±1.1 61.3±3.9 69.7±1.4 65.3±2.1 70.5±1.0 65.5±3.6 70.7±1.8
62.7±4.0 70.7±1.0 59.4±4.0 69.6±0.7 63.9±2.3 68.8±1.3 62.7±1.0 69.8±2.5 64.9±2.2 68.7±1.7 62.9±3.6 69.3±2.0 59.8±4.1 68.7±2.0
58.7±1.4 Average:64.9±1.3 60.7
58.1±2.0 64.3±1.8 55.8±2.3 71.0±1.0 58.2±1.5 65.3±0.8 59.0±1.1 68.5±0.9 57.0±1.5 66.6±0.9 56.7±1.6 70.2±1.0 58.6±1.1 68.1±1.2
63.4
56.3±1.6 68.7±1.2 59.1±1.3 68.0±1.4 57.1±1.2 66.5±0.5 61.3±1.5 68.4±0.8 60.2±1.5 66.6±1.7 60.1±1.5 67.0±0.8 62.3±0.7 66.4±0.7
50.5±9.1 67.1±1.0 61.3±1.5 69.5±0.8 56.4±3.9 68.8±1.8 57.1±1.0 67.6±1.1 56.7±0.9 67.5±1.0 59.0±1.3 67.2±1.9
62.3
1.6 bu/acre increase
51.2±2.4 48.5±2.3 46.1±1.0 54.3±2.1 55.8±1.5 50.1±1.7 52.1±1.3 55.9±1.4 51.8±1.2 56.7±1.6 57.2±1.1 56.5±0.9 58.8±3.3 56.7±2.9 54.8±1.2 58.2±2.0 57.4±0.8Board of 58.8±1.0 © 2015 South Dakota Regents
160 180 Maya 60d 80c 100b 120ab 140a 160a 180a Mayb 60b 80a 100 Planting ab date3/ 120 ab Seeding Rate 140a 4 (thousands) 160a 180a Maybb May 60 60b 80 80b 100 100ab 120 120ab 140 140ab 160 160a 180 180ab Mayaa May 60bb 60 80aa 80 100aa 100 120aa 120 140aa 140 160aa 160 180aa 180 Maya 60ab 80ab 100a 120a 140a 160a
73.2±1.3 73.1±1.3
71.3±1.3 74.6±1.8
71.7±1.0 73.5±2.1
66.5±1.6 64.6±2.4 71.6±1.6 73.7±1.5 74.8±1.2 76.9±1.2 77.6±1.7
65.2±1.6 69.6±1.5 72.4±1.8 76.1±1.6 76.9±1.7 80.0±1.1 78.5±1.3
68.3±0.9 74.6±1.3 73.3±1.2 74.7±1.2 75.3±0.7 75.4±1.9 77.2±1.9
160a 180a Juneb 60d 80c 100b 120b 140ab 160a 180a Junea 60b 80b 100 a 3/ Planting date 120 Seeding aRate 140a 4 (thousands) 160ab 180ab Junea 60 80 100 120 140 160 180 Juneb 60b 60 80b 80 100a 100 120 120 ab 140 140a 160 160 ab 180 180 ab Juneb 60 80 100 120 140 160
61.8±3.7 68.2±2.2
68.5±1.7 66.1±2.7
71.0±2.3 68.5±2.8
50.4±2.6 61.7±1.4 62.5±1.7 64.0±1.9 65.4±2.1 69.8±1.2 67.7±1.4
51.3±1.2 59.6±2.3 65.0±1.8 67.3±1.9 67.3±1.4 68.2±1.0 68.8±1.6
52.7±1.9 57.9±1.7 63.1±1.2 64.1±0.8 65.4±1.6 67.6±1.0 70.1±1.3
2017 Yield: Brookings Farm 2017b South Shorea
Volgac
Year1/ Location2
2016a Brookings South Shorecc
Beresford Volgaa b
Brookingsc
51.8±1.7 52.3±1.6 55.2±1.1 53.1±1.2 57.4±3.0 59.1±1.6 53.0±1.1 56.9±1.5 55.4±1.6 Yield by treatment (bushels/acre) 53.1±1.0 54.4±2.0 59.0±1.3 56.7±2.2 56.3±2.0 57.8±2.8 58.1±1.3 58.6±1.6 57.3±1.7+ Untreated Fungicide Fungicide 57.6±1.5 54.9±1.9 57.6±1.7 Insecticide 46.1±3.1 63.4±2.2 51.7±4.4 58.0±2.5 55.0±3.9 55.6±1.4 49.9±3.3 57.3±3.0 61.0±3.4 54.6±1.8 56.9±3.4 50.4±1.9 57.3±3.1 54.6±3.1
49.1±3.5 62.8±4.0 55.5±3.8 57.3±2.6 58.7±3.3 58.3±2.6 59.1±4.4 57.6±2.7 55.4±3.9 53.9±0.9 56.8±4.6 54.6±2.4 64.8±3.0 53.1±1.8
51.8±4.8 59.7±2.0 52.9±2.8 58.0±1.7 50.5±2.8 53.5±1.7 56.2±4.4 55.5±2.6 56.2±5.4 56.7±2.7 66.1±3.0 53.7±2.6 55.9±3.5 54.5±1.8
50.0±3.5 Average:81.6±1.5 54.0
55.1±3.1 80.1±1.2 64.2±5.3 82.6±1.2 54.1±10.1 84.0±1.0 66.7±1.4 82.7±1.4 67.1±1.7 81.9±1.8 67.8±2.7 82.1±1.2 69.0±2.5 83.2±0.9
57.1
57.1±6.2 79.9±1.0 66.0±2.7 81.5±1.8 69.9±3.0 83.9±1.7 67.4±2.5 83.7±1.5 65.9±3.2 82.0±1.3 70.3±2.0 82.2±1.8 67.8±1.3 84.2±1.6
62.2±3.1 84.5±1.9 61.8±3.8 83.2±1.3 63.8±3.0 82.9±2.0 64.4±2.1 84.4±1.2 66.5±2.5 84.0±1.4 66.1±3.7 82.3±1.3
70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6 73.6±1.1
55.7
73.9±2.3 70.8±3.6 69.6±1.9 71.6±2.5 75.0±2.9 72.7±2.0 75.4±1.4 68.5±2.8 73.8±1.5 72.2±1.6 w71.2±1.0 w w. i G r o75.1±1.1 w. o r g ®
55.9±2.0 56.4±2.4 56.6±2.3 58.1±0.9 55.1±2.1 59.2±1.4 57.8±2.1 59.6±1.8 61.3±1.1 Yield by treatment (bushels/acre) 58.1±1.8 60.8±1.2 61.4±2.2 58.2±1.3 59.1±2.4 61.8±1.7 61.0±2.0 63.7±0.8 63.1±1.8 + Untreated Fungicide Fungicide 63.8±2.6 64.4±1.5 62.6±1.5 Insecticide 62.9±1.2 70.4±2.3 59.9±3.3 67.8±1.3 56.8±3.1 69.6±1.7 64.1±2.1 67.9±0.6 61.0±3.4 70.2±2.3 59.6±3.7 69.5±0.9 60.3±4.5 67.4±1.9
60.4±3.6 69.7±1.6 61.1±4.7 71.5±1.4 65.5±2.0 70.1±1.3 64.8±2.5 71.2±1.1 61.3±3.9 69.7±1.4 65.3±2.1 70.5±1.0 65.5±3.6 70.7±1.8
62.7±4.0 70.7±1.0 59.4±4.0 69.6±0.7 63.9±2.3 68.8±1.3 62.7±1.0 69.8±2.5 64.9±2.2 68.7±1.7 62.9±3.6 69.3±2.0 59.8±4.1 68.7±2.0
58.7±1.4 Average:64.9±1.3 60.7
58.1±2.0 64.3±1.8 55.8±2.3 71.0±1.0 58.2±1.5 65.3±0.8 59.0±1.1 68.5±0.9 57.0±1.5 66.6±0.9 56.7±1.6 70.2±1.0 58.6±1.1 68.1±1.2
63.4
56.3±1.6 68.7±1.2 59.1±1.3 68.0±1.4 57.1±1.2 66.5±0.5 61.3±1.5 68.4±0.8 60.2±1.5 66.6±1.7 60.1±1.5 67.0±0.8 62.3±0.7 66.4±0.7
50.5±9.1 67.1±1.0 61.3±1.5 69.5±0.8 56.4±3.9 68.8±1.8 57.1±1.0 67.6±1.1 56.7±0.9 67.5±1.0 59.0±1.3 67.2±1.9
62.3
51.2±2.4 48.5±2.3 46.1±1.0 54.3±2.1 55.8±1.5 50.1±1.7 52.1±1.3 55.9±1.4 51.8±1.2 56.7±1.6 57.2±1.1 56.5±0.9 58.8±3.3 56.7±2.9 54.8±1.2 58.2±2.0 57.4±0.8Board of 58.8±1.0 © 2015 South Dakota Regents
160 180 Maya 60d 80c 100b 120ab 140a 160a 180a Mayb 60b 80a 100 Planting ab date3/ 120 ab Seeding Rate 140a 4 (thousands) 160a 180a Maybb May 60 60b 80 80b 100 100ab 120 120ab 140 140ab 160 160a 180 180ab Mayaa May 60bb 60 80aa 80 100aa 100 120aa 120 140aa 140 160aa 160 180aa 180 Maya 60ab 80ab 100a 120a 140a 160a
73.2±1.3 73.1±1.3
71.3±1.3 74.6±1.8
71.7±1.0 73.5±2.1
66.5±1.6 64.6±2.4 71.6±1.6 73.7±1.5 74.8±1.2 76.9±1.2 77.6±1.7
65.2±1.6 69.6±1.5 72.4±1.8 76.1±1.6 76.9±1.7 80.0±1.1 78.5±1.3
68.3±0.9 74.6±1.3 73.3±1.2 74.7±1.2 75.3±0.7 75.4±1.9 77.2±1.9
160a 180a Juneb 60d 80c 100b 120b 140ab 160a 180a Junea 60b 80b 100 a 3/ Planting date 120 Seeding aRate 140a 4 (thousands) 160ab 180ab Junea 60 80 100 120 140 160 180 Juneb 60b 60 80b 80 100a 100 120 120 ab 140 140a 160 160 ab 180 180 ab Juneb 60 80 100 120 140 160
61.8±3.7 68.2±2.2
68.5±1.7 66.1±2.7
71.0±2.3 68.5±2.8
50.4±2.6 61.7±1.4 62.5±1.7 64.0±1.9 65.4±2.1 69.8±1.2 67.7±1.4
51.3±1.2 59.6±2.3 65.0±1.8 67.3±1.9 67.3±1.4 68.2±1.0 68.8±1.6
52.7±1.9 57.9±1.7 63.1±1.2 64.1±0.8 65.4±1.6 67.6±1.0 70.1±1.3
2017 Yield: Brookings Farm 2017b South Shorea
Volgac
Year1/ Location2
2016a Brookings South Shorecc
Beresford Volgaa b
Brookingsc
51.8±1.7 52.3±1.6 55.2±1.1 53.1±1.2 57.4±3.0 59.1±1.6 53.0±1.1 56.9±1.5 55.4±1.6 Yield by treatment (bushels/acre) 53.1±1.0 54.4±2.0 59.0±1.3 56.7±2.2 56.3±2.0 57.8±2.8 58.1±1.3 58.6±1.6 57.3±1.7+ Untreated Fungicide Fungicide 57.6±1.5 54.9±1.9 57.6±1.7 Insecticide 46.1±3.1 63.4±2.2 51.7±4.4 58.0±2.5 55.0±3.9 55.6±1.4 49.9±3.3 57.3±3.0 61.0±3.4 54.6±1.8 56.9±3.4 50.4±1.9 57.3±3.1 54.6±3.1
49.1±3.5 62.8±4.0 55.5±3.8 57.3±2.6 58.7±3.3 58.3±2.6 59.1±4.4 57.6±2.7 55.4±3.9 53.9±0.9 56.8±4.6 54.6±2.4 64.8±3.0 53.1±1.8
51.8±4.8 59.7±2.0 52.9±2.8 58.0±1.7 50.5±2.8 53.5±1.7 56.2±4.4 55.5±2.6 56.2±5.4 56.7±2.7 66.1±3.0 53.7±2.6 55.9±3.5 54.5±1.8
50.0±3.5 Average:81.6±1.5 54.0
55.1±3.1 80.1±1.2 64.2±5.3 82.6±1.2 54.1±10.1 84.0±1.0 66.7±1.4 82.7±1.4 67.1±1.7 81.9±1.8 67.8±2.7 82.1±1.2 69.0±2.5 83.2±0.9
57.1
57.1±6.2 79.9±1.0 66.0±2.7 81.5±1.8 69.9±3.0 83.9±1.7 67.4±2.5 83.7±1.5 65.9±3.2 82.0±1.3 70.3±2.0 82.2±1.8 67.8±1.3 84.2±1.6
62.2±3.1 84.5±1.9 61.8±3.8 83.2±1.3 63.8±3.0 82.9±2.0 64.4±2.1 84.4±1.2 66.5±2.5 84.0±1.4 66.1±3.7 82.3±1.3
70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6 73.6±1.1
55.7
73.9±2.3 70.8±3.6 69.6±1.9 71.6±2.5 75.0±2.9 72.7±2.0 75.4±1.4 68.5±2.8 73.8±1.5 72.2±1.6 w71.2±1.0 w w. i G r o75.1±1.1 w. o r g ®
55.9±2.0 56.4±2.4 56.6±2.3 58.1±0.9 55.1±2.1 59.2±1.4 57.8±2.1 59.6±1.8 61.3±1.1 Yield by treatment (bushels/acre) 58.1±1.8 60.8±1.2 61.4±2.2 58.2±1.3 59.1±2.4 61.8±1.7 61.0±2.0 63.7±0.8 63.1±1.8 + Untreated Fungicide Fungicide 63.8±2.6 64.4±1.5 62.6±1.5 Insecticide 62.9±1.2 70.4±2.3 59.9±3.3 67.8±1.3 56.8±3.1 69.6±1.7 64.1±2.1 67.9±0.6 61.0±3.4 70.2±2.3 59.6±3.7 69.5±0.9 60.3±4.5 67.4±1.9
60.4±3.6 69.7±1.6 61.1±4.7 71.5±1.4 65.5±2.0 70.1±1.3 64.8±2.5 71.2±1.1 61.3±3.9 69.7±1.4 65.3±2.1 70.5±1.0 65.5±3.6 70.7±1.8
62.7±4.0 70.7±1.0 59.4±4.0 69.6±0.7 63.9±2.3 68.8±1.3 62.7±1.0 69.8±2.5 64.9±2.2 68.7±1.7 62.9±3.6 69.3±2.0 59.8±4.1 68.7±2.0
58.7±1.4 Average:64.9±1.3 60.7
58.1±2.0 64.3±1.8 55.8±2.3 71.0±1.0 58.2±1.5 65.3±0.8 59.0±1.1 68.5±0.9 57.0±1.5 66.6±0.9 56.7±1.6 70.2±1.0 58.6±1.1 68.1±1.2
63.4
56.3±1.6 68.7±1.2 59.1±1.3 68.0±1.4 57.1±1.2 66.5±0.5 61.3±1.5 68.4±0.8 60.2±1.5 66.6±1.7 60.1±1.5 67.0±0.8 62.3±0.7 66.4±0.7
50.5±9.1 67.1±1.0 61.3±1.5 69.5±0.8 56.4±3.9 68.8±1.8 57.1±1.0 67.6±1.1 56.7±0.9 67.5±1.0 59.0±1.3 67.2±1.9
62.3
51.2±2.4 48.5±2.3 46.1±1.0 54.3±2.1 55.8±1.5 50.1±1.7 52.1±1.3 55.9±1.4 51.8±1.2 56.7±1.6 57.2±1.1 56.5±0.9 58.8±3.3 56.7±2.9 54.8±1.2 58.2±2.0 57.4±0.8Board of 58.8±1.0 © 2015 South Dakota Regents
140a 160a 180a Mayb 60b 80a 100ab 120ab 140a 160a 180a Mayb 60b 80b 100 Planting ab date3/ 120 ab Seeding Rate 140ab 4 (thousands) 160a 180ab Mayba May 60 60b 80 80a 100 100a 120 120a 140 140a 160 160a 180 180a Maya 60b 80a 100a 120a 140a 160a 180a Maya 60ab 80ab 100a 120a 140a 160a
74.8±1.2 76.9±1.2 77.6±1.7
76.9±1.7 80.0±1.1 78.5±1.3
75.3±0.7 75.4±1.9 77.2±1.9
51.8±1.7 53.1±1.2 53.0±1.1 53.1±1.0 56.7±2.2 58.1±1.3 57.6±1.5
52.3±1.6 57.4±3.0 56.9±1.5 54.4±2.0 56.3±2.0 58.6±1.6 54.9±1.9
55.2±1.1 59.1±1.6 55.4±1.6 59.0±1.3 57.8±2.8 57.3±1.7 57.6±1.7
140ab 160a 180a Junea 60b 80b 100a 120a 140a 160ab 180ab Junea 60 80 100 Planting date3/ 120Rate Seeding 4 140 (thousands) 160 180 Juneab 60 80 100 120 140 160 180 Juneb 60b 80b 100a 120ab 140a 160ab 180ab Juneb 60 80 100 120 140 160
65.4±2.1 69.8±1.2 67.7±1.4
67.3±1.4 68.2±1.0 68.8±1.6
65.4±1.6 67.6±1.0 70.1±1.3
55.9±2.0 58.1±0.9 57.8±2.1 58.1±1.8 58.2±1.3 61.0±2.0 63.8±2.6
56.4±2.4 55.1±2.1 59.6±1.8 60.8±1.2 59.1±2.4 63.7±0.8 64.4±1.5
56.6±2.3 59.2±1.4 61.3±1.1 61.4±2.2 61.8±1.7 63.1±1.8 62.6±1.5
2017 Yield: Southeast Farm Volgac
Brookingsc
Year1/ Location2
2016a Beresford bc South Shore
Volgaa
Brookingsc
46.1±3.1 49.1±3.5 51.8±4.8 51.7±4.4 55.5±3.8 52.9±2.8 55.0±3.9 58.7±3.3 50.5±2.8 Yield by treatment (bushels/acre) 49.9±3.3 59.1±4.4 56.2±4.4 61.0±3.4 55.4±3.9 56.2±5.4 56.9±3.4 56.8±4.6 66.1±3.0+ Untreated Fungicide Fungicide 57.3±3.1 64.8±3.0 55.9±3.5 Insecticide 50.0±3.5 63.4±2.2 62.2±3.1 58.0±2.5 61.8±3.8 55.6±1.4 63.8±3.0 57.3±3.0 64.4±2.1 54.6±1.8 66.5±2.5 50.4±1.9 66.1±3.7 54.6±3.1
Average:81.6±1.5 62.1 84.5±1.9 83.2±1.3 82.9±2.0 84.4±1.2 84.0±1.4 82.3±1.3
55.1±3.1 62.8±4.0 64.2±5.3 57.3±2.6 54.1±10.1 58.3±2.6 66.7±1.4 57.6±2.7 67.1±1.7 53.9±0.9 67.8±2.7 54.6±2.4 69.0±2.5 53.1±1.8
57.1±6.2 59.7±2.0 66.0±2.7 58.0±1.7 69.9±3.0 53.5±1.7 67.4±2.5 55.5±2.6 65.9±3.2 56.7±2.7 70.3±2.0 53.7±2.6 67.8±1.3 54.5±1.8
80.1±1.2 82.6±1.2 84.0±1.0 82.7±1.4 81.9±1.8 82.1±1.2 83.2±0.9
79.9±1.0 81.5±1.8 83.9±1.7 83.7±1.5 82.0±1.3 82.2±1.8 84.2±1.6
63.4
66.3
4.2 bu/acre increase
70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6 73.6±1.1
73.9±2.3 70.8±3.6 69.6±1.9 71.6±2.5 75.0±2.9 72.7±2.0 75.4±1.4 68.5±2.8 73.8±1.5 w71.2±1.0 w w. i G r o72.2±1.6 w. o r g ® 75.1±1.1
62.9±1.2 60.4±3.6 62.7±4.0 59.9±3.3 61.1±4.7 59.4±4.0 56.8±3.1 65.5±2.0 63.9±2.3 Yield by treatment (bushels/acre) 64.1±2.1 64.8±2.5 62.7±1.0 61.0±3.4 61.3±3.9 64.9±2.2 59.6±3.7 65.3±2.1 62.9±3.6 + Untreated Fungicide Fungicide 60.3±4.5 65.5±3.6 59.8±4.1 Insecticide 58.7±1.4 70.4±2.3 50.5±9.1 67.8±1.3 61.3±1.5 69.6±1.7 56.4±3.9 67.9±0.6 57.1±1.0 70.2±2.3 56.7±0.9 69.5±0.9 59.0±1.3 67.4±1.9
58.1±2.0 69.7±1.6 55.8±2.3 71.5±1.4 58.2±1.5 70.1±1.3 59.0±1.1 71.2±1.1 57.0±1.5 69.7±1.4 56.7±1.6 70.5±1.0 58.6±1.1 70.7±1.8
56.3±1.6 70.7±1.0 59.1±1.3 69.6±0.7 57.1±1.2 68.8±1.3 61.3±1.5 69.8±2.5 60.2±1.5 68.7±1.7 60.1±1.5 69.3±2.0 62.3±0.7 68.7±2.0
Average:64.9±1.3 57.1 67.1±1.0
64.3±1.8 71.0±1.0 65.3±0.8 68.5±0.9 66.6±0.9 70.2±1.0 68.1±1.2
68.7±1.2 68.0±1.4 66.5±0.5 68.4±0.8 66.6±1.7 67.0±0.8 66.4±0.7
69.5±0.8 68.8±1.8 67.6±1.1 67.5±1.0 67.2±1.9
57.6
59.5
2.4 bu/acre increase
51.2±2.4 48.5±2.3 46.1±1.0 54.3±2.1 55.8±1.5 50.1±1.7 52.1±1.3 55.9±1.4 51.8±1.2 56.7±1.6 57.2±1.1 56.5±0.9 58.8±3.3 56.7±2.9 54.8±1.2 © 2015 South Dakota Regents 58.2±2.0 57.4±0.8Board of 58.8±1.0
140a 160a 180a Mayb 60b 80a 100ab 120ab 140a 160a 180a Mayb 60b 80b 100 Planting ab date3/ 120 ab Seeding Rate 140ab 4 (thousands) 160a 180ab Mayba May 60 60b 80 80a 100 100a 120 120a 140 140a 160 160a 180 180a Maya 60b 80a 100a 120a 140a 160a 180a Maya 60ab 80ab 100a 120a 140a 160a
74.8±1.2 76.9±1.2 77.6±1.7
76.9±1.7 80.0±1.1 78.5±1.3
75.3±0.7 75.4±1.9 77.2±1.9
51.8±1.7 53.1±1.2 53.0±1.1 53.1±1.0 56.7±2.2 58.1±1.3 57.6±1.5
52.3±1.6 57.4±3.0 56.9±1.5 54.4±2.0 56.3±2.0 58.6±1.6 54.9±1.9
55.2±1.1 59.1±1.6 55.4±1.6 59.0±1.3 57.8±2.8 57.3±1.7 57.6±1.7
140ab 160a 180a Junea 60b 80b 100a 120a 140a 160ab 180ab Junea 60 80 100 Planting date3/ 120Rate Seeding 4 140 (thousands) 160 180 Juneab 60 80 100 120 140 160 180 Juneb 60b 80b 100a 120ab 140a 160ab 180ab Juneb 60 80 100 120 140 160
65.4±2.1 69.8±1.2 67.7±1.4
67.3±1.4 68.2±1.0 68.8±1.6
65.4±1.6 67.6±1.0 70.1±1.3
55.9±2.0 58.1±0.9 57.8±2.1 58.1±1.8 58.2±1.3 61.0±2.0 63.8±2.6
56.4±2.4 55.1±2.1 59.6±1.8 60.8±1.2 59.1±2.4 63.7±0.8 64.4±1.5
56.6±2.3 59.2±1.4 61.3±1.1 61.4±2.2 61.8±1.7 63.1±1.8 62.6±1.5
2017 Yield: Southeast Farm Volgac
Brookingsc
Year1/ Location2
2016a Beresford bc South Shore
Volgaa
Brookingsc
46.1±3.1 49.1±3.5 51.8±4.8 51.7±4.4 55.5±3.8 52.9±2.8 55.0±3.9 58.7±3.3 50.5±2.8 Yield by treatment (bushels/acre) 49.9±3.3 59.1±4.4 56.2±4.4 61.0±3.4 55.4±3.9 56.2±5.4 56.9±3.4 56.8±4.6 66.1±3.0+ Untreated Fungicide Fungicide 57.3±3.1 64.8±3.0 55.9±3.5 Insecticide 50.0±3.5 63.4±2.2 62.2±3.1 58.0±2.5 61.8±3.8 55.6±1.4 63.8±3.0 57.3±3.0 64.4±2.1 54.6±1.8 66.5±2.5 50.4±1.9 66.1±3.7 54.6±3.1
Average:81.6±1.5 62.1 84.5±1.9 83.2±1.3 82.9±2.0 84.4±1.2 84.0±1.4 82.3±1.3 70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6 73.6±1.1
55.1±3.1 62.8±4.0 64.2±5.3 57.3±2.6 54.1±10.1 58.3±2.6 66.7±1.4 57.6±2.7 67.1±1.7 53.9±0.9 67.8±2.7 54.6±2.4 69.0±2.5 53.1±1.8
57.1±6.2 59.7±2.0 66.0±2.7 58.0±1.7 69.9±3.0 53.5±1.7 67.4±2.5 55.5±2.6 65.9±3.2 56.7±2.7 70.3±2.0 53.7±2.6 67.8±1.3 54.5±1.8
80.1±1.2 82.6±1.2 84.0±1.0 82.7±1.4 81.9±1.8 82.1±1.2 83.2±0.9
79.9±1.0 81.5±1.8 83.9±1.7 83.7±1.5 82.0±1.3 82.2±1.8 84.2±1.6
63.4
66.3
73.9±2.3 70.8±3.6 69.6±1.9 71.6±2.5 75.0±2.9 72.7±2.0 75.4±1.4 68.5±2.8 73.8±1.5 w71.2±1.0 w w. i G r o72.2±1.6 w. o r g ® 75.1±1.1
62.9±1.2 60.4±3.6 62.7±4.0 59.9±3.3 61.1±4.7 59.4±4.0 56.8±3.1 65.5±2.0 63.9±2.3 Yield by treatment (bushels/acre) 64.1±2.1 64.8±2.5 62.7±1.0 61.0±3.4 61.3±3.9 64.9±2.2 59.6±3.7 65.3±2.1 62.9±3.6 + Untreated Fungicide Fungicide 60.3±4.5 65.5±3.6 59.8±4.1 Insecticide 58.7±1.4 70.4±2.3 50.5±9.1 67.8±1.3 61.3±1.5 69.6±1.7 56.4±3.9 67.9±0.6 57.1±1.0 70.2±2.3 56.7±0.9 69.5±0.9 59.0±1.3 67.4±1.9
58.1±2.0 69.7±1.6 55.8±2.3 71.5±1.4 58.2±1.5 70.1±1.3 59.0±1.1 71.2±1.1 57.0±1.5 69.7±1.4 56.7±1.6 70.5±1.0 58.6±1.1 70.7±1.8
56.3±1.6 70.7±1.0 59.1±1.3 69.6±0.7 57.1±1.2 68.8±1.3 61.3±1.5 69.8±2.5 60.2±1.5 68.7±1.7 60.1±1.5 69.3±2.0 62.3±0.7 68.7±2.0
Average:64.9±1.3 57.1 67.1±1.0
64.3±1.8 71.0±1.0 65.3±0.8 68.5±0.9 66.6±0.9 70.2±1.0 68.1±1.2
68.7±1.2 68.0±1.4 66.5±0.5 68.4±0.8 66.6±1.7 67.0±0.8 66.4±0.7
69.5±0.8 68.8±1.8 67.6±1.1 67.5±1.0 67.2±1.9
57.6
59.5
51.2±2.4 48.5±2.3 46.1±1.0 54.3±2.1 55.8±1.5 50.1±1.7 52.1±1.3 55.9±1.4 51.8±1.2 56.7±1.6 57.2±1.1 56.5±0.9 58.8±3.3 56.7±2.9 54.8±1.2 © 2015 South Dakota Regents 58.2±2.0 57.4±0.8Board of 58.8±1.0
140a 160a 180a Mayb 60b 80a 100ab 120ab 140a 160a 180a Mayb 60b 80b 100 Planting ab date3/ 120 ab Seeding Rate 140ab 4 (thousands) 160a 180ab Mayba May 60 60b 80 80a 100 100a 120 120a 140 140a 160 160a 180 180a Maya 60b 80a 100a 120a 140a 160a 180a Maya 60ab 80ab 100a 120a 140a 160a
74.8±1.2 76.9±1.2 77.6±1.7
76.9±1.7 80.0±1.1 78.5±1.3
75.3±0.7 75.4±1.9 77.2±1.9
51.8±1.7 53.1±1.2 53.0±1.1 53.1±1.0 56.7±2.2 58.1±1.3 57.6±1.5
52.3±1.6 57.4±3.0 56.9±1.5 54.4±2.0 56.3±2.0 58.6±1.6 54.9±1.9
55.2±1.1 59.1±1.6 55.4±1.6 59.0±1.3 57.8±2.8 57.3±1.7 57.6±1.7
140ab 160a 180a Junea 60b 80b 100a 120a 140a 160ab 180ab Junea 60 80 100 Planting date3/ 120Rate Seeding 4 140 (thousands) 160 180 Juneab 60 80 100 120 140 160 180 Juneb 60b 80b 100a 120ab 140a 160ab 180ab Juneb 60 80 100 120 140 160
65.4±2.1 69.8±1.2 67.7±1.4
67.3±1.4 68.2±1.0 68.8±1.6
65.4±1.6 67.6±1.0 70.1±1.3
55.9±2.0 58.1±0.9 57.8±2.1 58.1±1.8 58.2±1.3 61.0±2.0 63.8±2.6
56.4±2.4 55.1±2.1 59.6±1.8 60.8±1.2 59.1±2.4 63.7±0.8 64.4±1.5
56.6±2.3 59.2±1.4 61.3±1.1 61.4±2.2 61.8±1.7 63.1±1.8 62.6±1.5
2017 Yield: Southeast Farm Volgac
Brookingsc
Year1/ Location2
2016a Beresford bc South Shore
Volgaa
Brookingsc
46.1±3.1 49.1±3.5 51.8±4.8 51.7±4.4 55.5±3.8 52.9±2.8 55.0±3.9 58.7±3.3 50.5±2.8 Yield by treatment (bushels/acre) 49.9±3.3 59.1±4.4 56.2±4.4 61.0±3.4 55.4±3.9 56.2±5.4 56.9±3.4 56.8±4.6 66.1±3.0+ Untreated Fungicide Fungicide 57.3±3.1 64.8±3.0 55.9±3.5 Insecticide 50.0±3.5 63.4±2.2 62.2±3.1 58.0±2.5 61.8±3.8 55.6±1.4 63.8±3.0 57.3±3.0 64.4±2.1 54.6±1.8 66.5±2.5 50.4±1.9 66.1±3.7 54.6±3.1
Average:81.6±1.5 62.1 84.5±1.9 83.2±1.3 82.9±2.0 84.4±1.2 84.0±1.4 82.3±1.3 70.4±2.5 70.1±1.0 73.8±2.2 76.2±0.4 73.1±1.6 73.6±1.1
55.1±3.1 62.8±4.0 64.2±5.3 57.3±2.6 54.1±10.1 58.3±2.6 66.7±1.4 57.6±2.7 67.1±1.7 53.9±0.9 67.8±2.7 54.6±2.4 69.0±2.5 53.1±1.8
57.1±6.2 59.7±2.0 66.0±2.7 58.0±1.7 69.9±3.0 53.5±1.7 67.4±2.5 55.5±2.6 65.9±3.2 56.7±2.7 70.3±2.0 53.7±2.6 67.8±1.3 54.5±1.8
80.1±1.2 82.6±1.2 84.0±1.0 82.7±1.4 81.9±1.8 82.1±1.2 83.2±0.9
79.9±1.0 81.5±1.8 83.9±1.7 83.7±1.5 82.0±1.3 82.2±1.8 84.2±1.6
63.4
66.3
73.9±2.3 70.8±3.6 69.6±1.9 71.6±2.5 75.0±2.9 72.7±2.0 75.4±1.4 68.5±2.8 73.8±1.5 w71.2±1.0 w w. i G r o72.2±1.6 w. o r g ® 75.1±1.1
62.9±1.2 60.4±3.6 62.7±4.0 59.9±3.3 61.1±4.7 59.4±4.0 56.8±3.1 65.5±2.0 63.9±2.3 Yield by treatment (bushels/acre) 64.1±2.1 64.8±2.5 62.7±1.0 61.0±3.4 61.3±3.9 64.9±2.2 59.6±3.7 65.3±2.1 62.9±3.6 + Untreated Fungicide Fungicide 60.3±4.5 65.5±3.6 59.8±4.1 Insecticide 58.7±1.4 70.4±2.3 50.5±9.1 67.8±1.3 61.3±1.5 69.6±1.7 56.4±3.9 67.9±0.6 57.1±1.0 70.2±2.3 56.7±0.9 69.5±0.9 59.0±1.3 67.4±1.9
58.1±2.0 69.7±1.6 55.8±2.3 71.5±1.4 58.2±1.5 70.1±1.3 59.0±1.1 71.2±1.1 57.0±1.5 69.7±1.4 56.7±1.6 70.5±1.0 58.6±1.1 70.7±1.8
56.3±1.6 70.7±1.0 59.1±1.3 69.6±0.7 57.1±1.2 68.8±1.3 61.3±1.5 69.8±2.5 60.2±1.5 68.7±1.7 60.1±1.5 69.3±2.0 62.3±0.7 68.7±2.0
Average:64.9±1.3 57.1 67.1±1.0
64.3±1.8 71.0±1.0 65.3±0.8 68.5±0.9 66.6±0.9 70.2±1.0 68.1±1.2
68.7±1.2 68.0±1.4 66.5±0.5 68.4±0.8 66.6±1.7 67.0±0.8 66.4±0.7
69.5±0.8 68.8±1.8 67.6±1.1 67.5±1.0 67.2±1.9
57.6
59.5
51.2±2.4 48.5±2.3 46.1±1.0 54.3±2.1 55.8±1.5 50.1±1.7 52.1±1.3 55.9±1.4 51.8±1.2 56.7±1.6 57.2±1.1 56.5±0.9 58.8±3.3 56.7±2.9 54.8±1.2 © 2015 South Dakota Regents 58.2±2.0 57.4±0.8Board of 58.8±1.0
Conclusions • Higher planting populations result in larger amounts of lost seed – Also doesn’t result in consistent increased yield
• Yield increases from seed treatments do occur, but are location dependent • Many factors probably influencing this w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
Take-away • For South Dakota, early season aboveground insects and diseases are likely driving the observed yield improvements due to seed treatments. However, current recommendations don’t address this and need to be reconfigured to the regional level within the state.
w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
Acknowledgements • Funding
• Staff and Students – Philip Rozeboom – Cole Dierks – Nathan Braun w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
Acknowledgements • Funding
• Staff and Students – Philip Rozeboom – Cole Dierks – Nathan Braun w w w. i G r o w. o r g ®
© 2015 South Dakota Board of Regents
