Abstract
Growing demand for corn due to the expansion of ethanol has increased concerns that environmentally sensitive lands retired from agricultural production and enrolled into the Conservation Reserve Program (CRP) will be cropped again. Iowa produces more ethanol than any other state in the United States, and it also produces the most corn. Thus, an examination of the impacts of higher crop prices on CRP land in Iowa can give insight into what we might expect nationally in the years ahead if crop prices remain high. We construct CRP land supply curves for various corn prices and then estimate the environmental impacts of cropping CRP land through the Environmental Policy Integrated Climate (EPIC) model. EPIC provides edge-of-field estimates of soil erosion, nutrient loss, and carbon sequestration. We find that incremental impacts increase dramatically as higher corn prices bring into production more and more environmentally fragile land. Maintaining current levels of environmental quality will require substantially higher spending levels. Even allowing for the cost savings that would accrue as CRP land leaves the program, a change in targeting strategies will likely be required to ensure that the most sensitive land does not leave the program.
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Atwood J (2008) CEAP assessment of CRP benefits in upper Mississippi. Paper presented at the annual meeting of the soil and water conservation society, 26–31 July 2008, Tucson, Arizona
Babcock BA, Lakshminarayan PG, Wu J, Zilberman D (1996) The economics of a public fund for environmental amenities: a study of CRP contracts. American Journal of Agricultural Economics 78:961–971
Chung SW, Gassman PW, Huggins DR, Randall GW (2001) Evaluation of EPIC for tile flow and tile nitrate losses from three Minnesota cropping systems. Journal of Environment Quality 30(3):822–830
Chung SW, Gassman PW, Gu R, Kanwar RS (2002) Evaluation of EPIC for assessing tile flow and nitrogen losses for alternative agricultural management systems. Transactions of the ASAE 45(4):1135–1146
Claassen R, Hansen L, Peters M, Breneman V, Weinberg M, Cattaneo A, Feather P, Gadsby D, Hellerstein D, Hopkins J, Johnston P, Morehart M, Smith M (2001) Agri-environmental policy at the crossroads: guideposts on a changing landscape. Agricultural Economics Report No. 794. Economic Research Service, US Department of Agriculture. http://www.ers.usda.gov/publications/aer794/. Accessed 10 Oct 2007
Duffy M, Smith D (2007) Estimated costs of crop production in Iowa—2007. File A1-20. Iowa State University Extension, Ames, Iowa. http://www.extension.iastate.edu/agdm/crops/pdf/a1-20.pdf. Accessed 11 Dec 2007
Elobeid A, Tokgoz S, Hayes DJ, Babcock BA, Hart CE (2006) The Long-run impact of corn-based ethanol on the grain, oilseed, and livestock sectors: a preliminary assessment. Briefing paper 06-BP 49. Center for Agricultural and Rural Development, Iowa State University, Ames, Iowa. http://www.card.iastate.edu/publications/DBS/PDFFiles/06bp49.pdf. Accessed 17 Oct 2008
Farm Service Agency (FSA) (2004) Cumulative crp enrollment by county, FY—2004. http://www.fsa.usda.gov/Internet/FSA_File/fy2004public.xls. Accessed 10 Dec 2007
Farm Service Agency (FSA) (2007) The conservation reserve program: summary and enrollment statistics 2007. http://www.fsa.usda.gov/Internet/FSA_File/annual_consv_2007.pdf. Accessed 18 Sept 2008
Gassman PW, Williams JR, Benson VW, Izaurralde RC, Hauck L, Jones CA, Atwood JD, Kiniry J, Flowers JD (2005) Historical development and applications of the EPIC and APEX models. Working paper 05-WP 397. Center for Agricultural and Rural Development, Iowa State University, Ames, Iowa. http://www.card.iastate.edu/publications/synopsis.aspx?id=763. Accessed 5 May 2007
Iowa Cooperative Soil Survey (2003) Iowa soil properties and interpretation database. http://icss.agron.iastate.edu/. Accessed 12 Feb 2007
Iowa Department of Natural Resources (IDNR) (2004) Land cover of the state of Iowa in the year 2002, Grid dataset. ftp://ftp.igsb.uiowa.edu/gis_library/IA_State/Land_Description/Land_Cover/Land_Cover_2002/lc_2002.htm. Accessed 12 Feb 2007
Izaurralde RC, Williams JR, McGill WB, Rosenberg NJ (2006) Simulating soil C dynamics with EPIC: model description and testing against long-term data. Ecological Modelling 192(3–4):362–384
Kelley RH, Parton WJ, Crocker GJ, Grace PR, Klír J, Körschens M, Poulton PR, Richter DD (1997) Simulating trends in soil organic carbon in long-term experiments using the century model. Geoderma 81:75–90
Lubowski R, Bucholtz S, Claassen R, Roberts MJ, Cooper JC, Gueorguieva A, Johansson R (2006) Environmental effects of agricultural land-use change. Economic research report No. 25. Economic Research Service, US Department of Agriculture. http://www.ers.usda.gov/Publications/ERR25/. Accessed 10 Oct 2007
Mapemba LD, Epplin FM, Taliaferro CM, Huhnke RL (2007) Biorefinery feedstock production on conservation reserve program land. Review of Agricultural Economics 29(2):227–246
Nielson RM, McDonald LL, Howlin S, Sullivan JP, Burgess C, Johnson DS (2006) Estimating response of ring-necked pheasant (Phasianus Colchicus) to the conservation reserve program. http://www.fsa.usda.gov/Internet/FSA_File/crp_pheasants_final_report.pdf. Accessed 18 Aug 2007
Pautsch GR, Kurkalova LA, Babcock BA, Kling CL (2001) Efficiency of sequestering carbon in agricultural soils. Contemporary Economic Policy 19(2):123–134
Potter SR, Andrews S, Atwood JD, Kellogg RL, Lemunyon J, Norfleet L, Oman D (2006) Model simulation of soil loss, nutrient loss, and change in soil organic carbon associated with crop production. US Department of Agriculture, Natural Resources Conservation Service, Conservation Effects Assessment Project Report. http://www.nrcs.usda.gov/technical/nri/ceap/croplandreport/. Accessed 26 Oct 2008
Riffell SK, Burger LW (2006) Estimating wildlife response to the conservation reserve program: Bobwhite and Grassland birds. http://www.fsa.usda.gov/Internet/FSA_File/quail_study.pdf. Accessed 18 Aug 2007
Sawyer J (2006) Corn nitrogen rate calculator web tool updated. IC-496(24), Iowa State University Extension, Ames, Iowa. http://www.ipm.iastate.edu/ipm/icm/2006/9-18/ntool.html. Accessed 5 Sept 2008
Sawyer J, Nafziger E, Randall G, Bundy L, Rehm G, Joern B (2006) Concepts and rationale for regional nitrogen rate guidelines for corn. PM 2015 Iowa State University Extension, Ames, Iowa. http://www.extension.iastate.edu/Publications/PM2015.pdf. Accessed 31 Aug 2008
Schroeder MA, Vander Haegen WM (2006) Use of CRP Fields by Greater Sage-grouse and other Shrubsteppe associated Wildlife in Washington. Farm Service Agency, US Department of Agriculture. http://www.fsa.usda.gov/Internet/FSA_File/sage_grouse.pdf. Accessed 18 Aug 2007
Tokgoz S, Elobeid A, Fabiosa JF, Hayes DJ, Babcock BA, Yu T, Dong F, Hart CE, Beghin JC (2007) Emerging biofuels: outlook of effects on U.S. grain, oilseed, and livestock markets. Staff Report 07-SR 101. Center for Agricultural and Rural Development, Iowa State University, Ames, IA
USDA (2000–2006) Farm business and household survey data: customized data summaries from ARMS. http://www.ers.usda.gov/Data/ARMS/app/Crop.aspx. Accessed 9 Nov 2008
USDA (2006) 2007 Farm bill theme papers: conservation and the environment. http://www.usda.gov/documents/FarmBill07consenv.pdf. Accessed 10 Nov 2007
USDA Natural Resources Conservation Service (2006) Soil survey geographic (SSURGO) database for Iowa. http://soildatamart.nrcs.usda.gov. Accessed 10 Feb 2007
Vetsch JA, Randall GW, Lamb JA (2007) Corn and soybean production as affected by tillage systems. Agronomy Journal 99:952–959
Vyn TJ, West TD, Steinhardt GC (2000) Corn and soybean response to tillage and rotation systems on a dark prairie soil: 25 year review. No. 196 (p. 1-10. In Proceedings of 15th conference on international soil tillage research organisation, 2–6 July 2000. Fort Worth, Texas
Wilhelm WW, Wortmann CS (2004) Tillage and rotation interactions for corn and soybean grain yield as affected by precipitation and air temperature. Agronomy Journal 96:425–432
Williams JR (1990) The erosion productivity impact calculator (EPIC) model: a case history. Philosophical Transaction of the Royal Society of London 329:421–428
Williams JR (1995) The EPIC model. In: Singh VP (ed) Computer models of watershed hydrology. Water Resources Publications, Highlands Ranch, CO, pp 909–1000
Williams JR, Jones CA, Dyke PT (1984) A modeling approach to determining the relationship between erosion and soil productivity. Transactions of the ASAE 27:129–144
Acknowledgments
We thank Todd Campbell for excellent computational assistance. This research was made possible in part by USDA-CSREES grant 2005-51130-02366, USDA-Rural Development grant 68-3A75-6-511 and EPA Collaborative agreement CR83371701-1. The views expressed here are those of the authors and do not necessarily represent the view of USDA or EPA.
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Secchi, S., Gassman, P.W., Williams, J.R. et al. Corn-Based Ethanol Production and Environmental Quality: A Case of Iowa and the Conservation Reserve Program. Environmental Management 44, 732–744 (2009). https://doi.org/10.1007/s00267-009-9365-x
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DOI: https://doi.org/10.1007/s00267-009-9365-x