A FOUR-YEAR survey of wasteland in Heilungkiang Province, northeast China, estimated the reclaimable land at 8 million hectares, equivalent to the total cultivated area of the province. The...
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A FOUR-YEAR survey of wasteland in Heilungkiang Province, northeast China, estimated the reclaimable land at 8 million hectares, equivalent to the total cultivated area of the province. The...