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The farmland pressure index (FPI) was applied to assess the food security in Jiuquan City. The change of food security condition from 1988 to 2007 was analyzed according to the data of population, farmland area and grain yield in study area. The grey model (GM) (1, 1) was built to predict the food security condition next 10 years. The following conclusions were gotten. The FPI is greater than1 from...
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