【摘 要】
:
During the rapid urbanization period, the contradiction between demand for the construction land and the preservation of cultivated land for food security is ge
【机 构】
:
CollegeofUrbanandEnvironmentalSciences
【基金项目】
:
This paper is supported by Scientific and Tech-nological Major Project in National Eleventh Five-Year Plan (Grant No. 2006BAJ05A04).