描述:
ium between the grain production
and water resource: the drought and the irrigation area in northeast china, the drought and the
irrigation region in Huanghuaihai area, the drought and the irrigation area in northwest
china.The article analized the characteristic of water using of the main crops and the main
cropping systems, compared the economic benefit of the water-saving planting patterns,
studied the economic benefit, the water-saving benefit and participatory farmers survey
results etc. of the water-saving technologies.
描述:
rmit put forward the theory is
unique, but both thought in the Han literature are complementary. Similarly, the Han
Dynasty's political, economic, and cultural fields may affect the emotional hermit scholars, in
which Qu Yuan complex, monarch and his subjects haphazard about this relation with an
example.