描述:
s a historical
and cultural value and artistic value, can not be ignored, and the use of value
from the current run, they demonstrate the art of the laws and rules also have
an aesthetic universal,Itself a form of beauty and re-creative values, which for
us to inherit and carry forward the modern realization of the great
responsibilities and obligations of traditional arts have practical
significance.
描述:
ncentrated v}}ith 85% of the
total dry lands. and it is important for the national economy and the countr<0's strategic
agricultural growth. Northwest arid areas basically depend on natural precipitation. water
shortage has seriously affected the farmers practices. The decision of farmers to plant dry
land is a two-stage decision-making behavior: They first have to decide whether to plant
dry land, and then decide what kind of crops planted in the dry lands. It is essential to find
effective ways to raise the enthusiasm of farmers planting and reasonable arrangements for
dry land crop structure. However. ver}} few people study dry land farming practice from the
perspective of water shortages.
描述:
t important methods
commonly used in the prehistoric culture exhibiton. Scene reappearance is not simply
an artistic creation, but a serious scientific work. Which archaeological information
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:
nd its ability to resist the risk of price
fluctuation is
fluctuating in
relatively weak, so they often become the most direct victims for the rapidly
cotton price, reducing the cotton farmers'enthusiasm to grow cotton .The cotton