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:
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.
描述:
he paper studies from the situation and feature of Agriculture
Tri-dimension Pollution in Yellow River Basin areas, and divides it into several regions according to
basin’s pollution feature by adopting the method of searching documents , research, systems analysis,
quantitative and qualitative analysis and so on, and analyzes the problem of Agriculture Tri-dimension
Pollution in Yellow River Basin areas from the view of tri-dimension and system by use of the theory of
Environmental value, Technology Value, Ecology, Circular economy , uses System Dynamics to track
dynamically the change in the future of the various variables in different modes and constructs the
system mode of agricultural tri-dimension pollution in Yellow River Basin, and simulates the system;
描述:
their similarity in shape and structure of law; Second, the
significance that painted pottery patterns and hieroglyphics play on
animation; Third, digital deduction in painted pottery patterns and
hieroglyphs, which is regarded as the innovative conclusion by the
writer.
描述:
an’s historical
origins of the scarifical custom’s,the third part is the fieldwork of XinJiang
Heshuote Mongolian’s fire scarifical customs.the fourth parts is the cultrual
studies of XiinJiang Heshuote Mongolian’s scarifical customs.the fifth pars is the
conclusion of thesis,and the last part is the referenses of this thesis.
描述:
early defined the concept of ancient forestry literature,
understood its meaning and value of research and discussed the historical distribution and basic
characteristics of ancient Chinese forestry literature in the ancient books.
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.