描述:
gions and nationalities as
it was discovered. As a result, an international learning has taken shape,that is the
Study of Dunhuang, which contains the study of history, religion, culture, spoken and
written languages, geography,ect. See from the angle of spoken and written languages,
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.