China began surveying its land resources in 83 per cent of the 2,300 counties in 1978. Now, many are completed, and a wide body of scientific data has been collected.The programme covers soil, land...
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China began surveying its land resources in 83 per cent of the 2,300 counties in 1978. Now, many are completed, and a wide body of scientific data has been collected.The programme covers soil, land...