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:
ttention, but
also agriculture and eco-environmental sustainable development important
problems. Farming-pastoral Transitional zone in north China, as our county
returning farmland to forest and returning cropping land to grassland are the
focus areas, natural environment and socio-economic conditions shown a
clear transition characterized by the transition zone of the interpenetration and
staggered distribution of agriculture and animal husbandry, which is curbing
desertification important ecological barrier, but also ecologically fragile belts.
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.