最近,美国华盛顿州立大学、美国农业部和梅恩大学的科学家对无机肥料的施用情况联合进行了调查,结果发现,使用无机肥料的农田,其表土层消失的情况相当严重。华盛顿州有两个农庄,一个农庄长期以来一直使用无机肥料,另一个农庄一直使用有机粪肥。在过去的 Recently, scientists at Washington State University, the U.S. Department of Agriculture and Mayen University conducted a joint survey of the application of inorganic fertilizers and found that the use of inorganic fertilizers in farmland, the surface layer disappears quite serious. There are two farms in Washington State, one that has long used inorganic fertilizers and the other has been using organic manure. in the past