美国农业部对非官方水土保持规划的经济效益的评价,给人们以新的启示.由于个人与社会控制水土流失的投资效益,通常不成比例.因而期望有一个理想水土保持规划,以达到水土保持目的.美国农业部早在50年代,就提倡搞水土保持规划,当前联邦政府光技术援助及研究经费就超过10亿美元.然而,这些规划的经济效益没有准确评价.为了控制来自农田的土壤及其化学物质造成田间与非田间的损失,就需要制定水土保持规划,而制定任何水土保持规划都需要经费.联邦政府制定的农业水土保持规划,其效益—费用比是良好的.因此,象这样的规划,应加以重视. The USDA’s assessment of the economic benefits of unofficial soil and water conservation planning gives new insights into the extent to which individuals and society often have disproportionate investment returns from controlling soil and water loss and thus expect to have an ideal soil and water conservation plan to achieve soil and water conservation Purpose of the United States Department of Agriculture as early as the 1950s, advocated for water and soil conservation planning, the current federal government light technical assistance and research funding of more than one billion US dollars However, the economic benefits of these programs are not accurately evaluated In order to control the soil from the farmland and The chemicals that cause losses in the field and in the non-fields will require planning for soil and water conservation, and any planning for soil and water conservation will require funding. The benefit-cost ratio for agricultural soil and water conservation programs developed by the federal government is good. The planning should be taken seriously.