甘肃省耕地面积变化与人口、经济发展的相关关系研究

his article is base on 1997-2006 changes in the cultivated land of Gansu,research the process of the cultivated land changing in ten years.And by using statistical analysis methods, we analyzed the dynamic changing relation between the cultivated lands and the growth of population and economic development in Gansu province. The results show that cultivated land is opposited to population. However, the correlation between the area of cultivated land and theinvestment in the fixed assets，per capita GDP,urbanization is three cubed function.That is ,when with the increasing of population and the growth of economy, the tendency of the cultivated land decreasing presented a change of firstly decreasing,then in-creasing, and decreasing again.