Cultivated land resource is the foundation of food production and food security.According to the food crisis which is initiated by the increased food price,food security in China has become a focus once again,which is concerned by the public.This paper analyzed the changes of cultivation land resources from 1949 to 2005 in Yulin city.On the basis of this analysis,the relationship between cultivated land area and the inter-annual change ratio of food production in different historical stages was studied,an...
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