Analysis of Economic-Policy Driving Factors of County Cultivated Land Structure Changes:Based on Yanling County

Based on Yanling County,this thesis analyzes the driving mechanism of land-use change by using the correlation analysis and principal component analysis method.The results show the land-use change of Yanling county is due to many driving factors,such as socio-economic,agricultural policy,technological advancement.With industrial agglomeration and diffusion,policy guidance and promotion,the structure of County cultivated land is transforming from a single field ecosystem that provided mainly traditional grain production to the compound agricultural ecosystem that has more complex structure,more intensive agricultural production,more diversified farming products.