描述:
ing well-off society in nowadays,
as the rear areas of political and economic security, rural areas are not only the hope of Chinese
development but also the "bottleneck", which are influencing and restricting Chinese
development of society and economy.
描述:
duction in the area is
restricted by disadvantageous natural resources and environmental conditions,
including low arable land area per capita, frequent drought events and a landscape
dominated by mountains. Forage crop rotation systems could improve soil fertility,
increase crop外eld and provide quality forage supplies for livestock production.
Additionally, their adoption is considered a suitable means to advance sustainable
agriculture development. In this study, the role and status of forage crop rotations in
Tianshui city were studied.
描述:
th, the demand of water resource is
continuously increasing. That is to say water shortage has become a global problem. Water
resources carrying capacity is the basis and prerequisite of regional socio-economic development,
which is significant to realize the coordinated development of regional "water resources-
ecological environment-socio-economy" composite system. So it has become the focus and hot
topic in water science field nowdays.
描述:
th, the demand of water resource is
continuously increasing. That is to say water shortage has become a global problem. Water
resources carrying capacity is the basis and prerequisite of regional socio-economic development,
which is significant to realize the coordinated development of regional "water resources-
ecological environment-socio-economy" composite system. So it has become the focus and hot
topic in water science field nowdays.
描述:
sense of objective things, and true representation, but many aspects of folk
artists based prototype of things boldly imagined, with art extraction
techniques, processing, re-creation results.
描述:
stics of the basic
conditions for the development of agricultural industry in Jiuquan City and, the
situation of and constraints in the development of featured agricultural industry,
aiming at seeking an approach to futher develop the featured agricultural industry in
the city of Jiuquan.
描述:
bution, one of
the pathogenicity impaired crops. It has three genomic RNAs. So it is one of RNA
virus model strains to investigate pathogenicity mechanism in host.