HIGHLIGHTS
SUMMARY
NGP is often measured as "the ratio between the area of grain and the area of cash crops", "the proportion of sowing area of non-grain in the sowing area of agricultural products", or "the proportion of transfer in_(out) area of non-grain in the transfer in_(out) area of agricultural land". A higher NGP is driven by the higher cost of non-farming job opportuniand "non-grain crop sown area ratio to crop sown area ratio" as indicators for analysis. ties. At this time, "Grain ratio" referstotocrop the proportion of the sowing . . .
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