The quantity changes of the cropland of Henan Province tended to an equilibrium situation after experienced a reduce and ascend process by analyzing the statistics data in recent 20 years.Whereas,the center of gravity change of the cropland does not bring about the consistent change of the grain production by comparing their spatial changes.It shows that the quality of the cropland had declined though the quantity of the cropland of Henan Province had preserved an equilibrium situation,this has become an im...
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