Grading cultivated land quality accounted for the major part of state land resource survey.
农用地质量等级划分是国土资源大调查的主要内容。
Grading cultivated land quality accounts for the major part of state land resource survey.
农用地质量等级划分是国土资源大调查的主要内容。
The survey of land use at county level is the basic work for land management and the actual accurate data resource of land cover in our country.
县级土地利用调查是土地管理的基础性工作，是我国各级土地利用现状准确数据的实际来源。
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