Taking northern Jiangsu area as an example,economic disparity between urban and rural areas is described according to the data in 2000-2009 Jiangsu Statistical
On the basis of the FAO data,this paper analyzed the production,area harvested and yield of ten major tropical crops such as natural rubber,cassava and oil palm
The large-scale development of reservoir resources has caused excavated land and deposited land,and the damage is quite serious;a large portion of damaged land is arable land.The arable land resources