英文文献：Regional Implications of National Land Retirement Programs
英文文献作者：Dicks, Michael R.,McCormick, Ian
英文文献摘要：
Nearly one-third of cropland used in the production of the major food and feed grains was idled by land retirement programs in 1987. The geographic distribution of the idled acreage varied by crop and program. The variation in geographic distribution led to considerable variation in the impacts on regional, state and local economies .