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１高中低产田各为１／３的困惑及耕地分等定级问题尽管我国已经完成了两次土壤普查和一次土地详查。但对我国耕地质量和分等定级的问题,却始终也说不清楚。迄今为止,高中低产田各为１／３的说法,几乎还是不变的“定理”。但多年来,面对大量用于改造中低产田的资金投入,及?..
1 High school and low yield fields Each 1/3 of the confusion and grading and classification of cultivated land Although China has completed two soil censuses and a detailed survey of the land. However, the problems of grading and classifying cultivated land in our country are still not completely understood. So far, the high school low yield field each 1/3 argument, almost the same “theorem.” However, over the years, facing a large amount of capital investment for transforming medium and low-yield fields, and?