The lighter green land in the southeast was once forested, but is now grassland or agriculture.
西南部浅绿色的土地曾覆以森林，现在则变为草地或农田。
2
There are more grassland than farmland which determines the subordinate position of agriculture.
这种草场面积远远大于农耕面积的状况，决定了农业的从属地位。
3
The advance of technology of remote sensing monitoring for grassland vegetation in China, especially administered by the Ministry of Agriculture of China, is reviewed in this paper.