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一、1935年土壤保持法颁布以前的土壤侵蚀控制 由于土壤侵蚀对美国农业的威胁,从而引起政府的高度重视,1930年国会对布坎南议案进行了修改,通过了对农业拨款的议案(1929年2月
I. Pre-promulgation of Soil Erosion Control in 1935 The threat of grazing to the United States caused by soil erosion has drawn great attention from the government. In 1930, Congress amended the Buchanan motion and passed a motion on agricultural appropriation (1929 In February