Estimating Available Abandoned Cropland in the United States: Possibilities for Energy Crop Production

Ryan E. Baxter and Kirby E. Calvert

Annals of the American Association of Geographers, 2017, vol. 107, issue 5, 1162-1178

Abstract: Abandoned cropland (ACL) is often cited as a land resource on which to produce energy crops while reducing the negative impacts of broad-scale energy crop production; for example, carbon emissions from land-cover change and competition with food production. In contrast to marginal land, which refers to a set of biophysical and economic criteria usually imposed by experts or policymakers, the designation of ACL refers to a land-use decision by a land owner. As such, ACL is argued to be a more appropriate indication of land availability for dedicated energy crop production. Prevailing estimates of ACL in the United States vary widely due to inconsistent treatment of land-use conversions away from cropland and overreliance on remote sensing methods that measure land cover, even though ACL is a category of land use. This article develops and applies a replicable and flexible methodology to estimate available abandoned cropland (AACL) at the county level in the United States, which accounts for conversion of ACL to forest cover, urban development, or permanent pasture. Estimates of AACL are derived for two scenarios: (1) land abandoned between 1978 and 2012, which excludes lands with meaningful forest regrowth, and (2) land abandoned between 2007 and 2012, which corresponds to land-use constraints imposed by the Renewable Fuel Standard. Results show that 15.0 and 4.9 Mha of AACL exist in the United States in the two scenarios, respectively, amounting to between only 3 and 8 percent of total light-duty gasoline consumption in the United States. The policy implications of these findings and the need for future research are discussed.

Date: 2017
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DOI: 10.1080/24694452.2017.1298985

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