摘要:The Conservation Reserve Program is the centerpiece of the largest set of conservation measures ever undertaken by the federal government. The program was introduced as part of the 1985 Farm Bill and has been continued under the 1995 legislation. Before the contracts expired in 1996 and USDA initiated an early release program in 1995, 35.6 million "highly erodible" acres had been committed to the CRP after 12 enrollment periods (Osborn). The CRP was designed to accomplish the twin goals of soil conservation and supply control. At the same time, concern was expressed over the impact on local rural economies of such large-scale reductions in farming activity. Therefore, the CRP legislation included a provision that no more than 25 percent of the cropland in any county could be set aside. The 25 percent limit seems to have been passed from previous programs rather than derived from any recent analytical efforts; the Soil Bank of 1956 operated under the same enrollment limits.