Rick Cruse Soil and Water Resources Vision

Iowa

Soil and Water Resources Vision Rick Cruse Department of Agronomy Iowa Water Center

Reminder #1  All living organisms require water

Reminder #2  Soil and water issues are global  Global events, activities, and climate directly and indirectly affect Iowa soil and water resources

Millennium Ecosystem Assessment Report  During the next 50 years, demand for food crops is

projected to grow by 70–85% under the MA scenarios, and demand for water by between 30% and 85%.

Millennium Ecosystem Assessment Report –Main Findings1  The supply of fresh water continues to be reduced

by severe pollution from anthropogenic sources in many parts of the world.

1http://www.millenniumassessment.org/documents/document.276.aspx.pdf

Millennium Ecosystem Assessment Report –Main Findings1  Water scarcity is a globally significant and

accelerating condition for 1–2 billion people worldwide, leading to problems with food production, human health, and economic development.

1http://www.millenniumassessment.org/documents/document.276.aspx.pdf

Terrain Suitability Index Soil and Terrain Suitability Index (SI) for a Range of Rain-Fed Crops and Pasture Types for the Current Climate

Fischer, et al., 2002: Global agro-ecological assessment for agriculture in the 21st century: methodology and results. Research Report RR-02-02. ISBN 3-7045-0141-7., International Institute for Applied Systems Analysis, Laxenburg, Austria, 119 pp. [Online at http://www.iiasa.ac.at/Research/LUC/Papers/gaea.pdf] Cited in the IPCC Fourth Assessment Report, Working Group II, Ch. 5, p. 280.

IPCC Fourth Assessment Report Summary for Policy Makers

World Population Distribution 1998

www.countrywatch.com

Oki, Taikan and Shinjiro Kanae. 2006. Global hydrological cycles and world water resources. Science. 313:1068-1072 Published by AAAS

Irrigation  ~ 40% of world food comes from 18% of world’s

cropland1

 India 3/5 of grain harvest  China 4/5 of grain harvest

1W

Danielle Nierenberg, Linda Starke and Erik Assadourian. 2007 State of the World – 2006. World Watch Institute.

Percent of Land Under Irrigation

Lawrence Livermore National Laboratory 7000 East Avenue • Livermore, CA 94550

Wheat Production Records from Countries Across the Globe - 2005

FAOSTAT, 2005. Crops Primary data last updated July 14, 2005, Food Supply Data last updated Aug 27, 2004.

China Population

China Wheat Production Tend

CBOT

India Wheat Production

Chicago Board of Trade

Factors of Iowa’s Vision  Continued global population growth  Reduced expansion of irrigated lands  Or possible loss of irrigated lands  Human consumption needs preempting irrigation  Increased frequency of climate stress on existing

productive lands

 Possible loss of rain fed lands

 Increased demands on land for food, feed, and fuel

Iowa Reminder #1  Soil quality has decreased over the past

50 years1

1Jessica Veenstra

– personal communication

Iowa Reminder #2 NO3-N Concentration (mg/L)

NO3-N Concentration in the Raccoon River at Des Moines

20.00 18.00 16.00 14.00 12.00 10.00 8.00 6.00 4.00 2.00 0.00 1972

Annual Max Annual Mean

1977

1982

1987

1992

1997

2002

Data provided by Chris Jones Des Moines Water Works

Iowa Reminder #3  Frequency of extreme rainfall events is increasing

Iowa Reminder #4  Corn yields are increasing

Workshop on Soil & Water Conservation and Iowa’s Future Agriculture June 26, 2008

Carol Williams, Rick Cruse, Matt Liebman, Kendall Lamkey

The Summit for Visioning Iowa’s Future Agriculture Department of Agronomy, Iowa State University

Tabitha Adkins (USEPA, Region 7) Harry Arentz (West Central Co-op) David Baker (Beginning Farmers Center) Dan Breedlove (USEPA, Region 7) Sarah Carlson (Practical Farmers of Iowa) Jerry Fitzgerald (Lobbyist, pork producers) Susan Heathcote (Iowa Environmental Council) Beth Larabee (Leopold Center) Sean McMahon (The Nature Conservancy) Tina Mowry (facilitator) James Newman (ISU, Ag Systems Engineering) Rick Robinson (Iowa Farm Bureau) Deb Ryun (Iowa Soil & Water Conservation Districts) Duane Sand (Iowa Natural Heritage Foundation) Jeff Schnell (Iowa Pork Producers) Max Schnepf (ret., USDA) Marvin Shirley (Iowa Farmers Union) Angie Tagtow (Food & Society Policy Fellow) Mark Tomer (USDA Tilth Lab) Carol Williams (ISU, Agronomy) Brian Wilsey (ISU, EEOB) Roger Wolf (Iowa Soybean Association)

Iowa Soil and Water Issues  Re-establishment of resilience, system-wide and on-

farm

 Extreme weather events  Seasonal weather pattern shifts  Increasing volatility of grain prices  Increasing volatility of energy costs  Rapidly increasing production costs

Iowa Soil and Water Issues  Use of watershed-based and science-based approaches  Increase use of targeted approaches  Sophisticated science based decision tools  Community involvement

Iowa Soil and Water Issues  Greater farmer empowerment  Land ownership  Greater production choice  Entrepreneurism

Iowa Soil and Water Issues  Implementation of proactive policy

Iowa Vision  Increased world need for food, feed, and biofuel  Increased demand for Iowa grown products  Increased pressure on Iowa’s soil and water resources  Increasing frequency of intense precipitation events  Increased soil and water degradation  Increased flooding frequency  Flood plain activity will increase  Residence and construction issues  Soil and water conservation issues

Iowa Vision  Absentee land ownership will rise  Continue to incentivize one-dimensional agriculture  Require increase political creativity for soil and water conservation  Require redirection of land management educational efforts  Science based solutions  Targeting  Increases sophistication in seeking solutions  

Lidar Wetlands

Rainfed and Irrigated Ag. Land  Rainfed – 1.13 billion ha  Irrigated – 0.4 billion ha  Total – 1.53 billion ha  Potential rainfed lands – 3.29 billion ha 

Biradar C.M., Thenkabail P.S., Noojipady, P., Li, Y.J., Dheeravath, V., Velpuri, M., Turral H., Cai, X. L., and Ganguntla, O.R., 2007. A Global map of rainfed cropland areas (GMRCA) using time-series data from multiple satellite sensors. International Journal of Remote Sensing.