描述:
teau the seeding season is cold and little
rainfall. Soil temperature,moisture and fertilizer is an important factor in crop yield. So in this
area dissemination conservation tillage of importance. Most of former researches in
comparison between conservation tillage and conventional tillage. This experimentation
compare with sereval conservation tillage's difference. Through this comparison, wind-water
erosion in the Loess Plateau ecologically fragile areas and application of a reasonable choice
of different measures to provide a reference of farming with a view to achieving the
sustainable and health development of agriculture. In this study, selection of test sites in the
Loess Plateau in northern China typical wind-water erosion area Shenmu, a no-tillage, straw
mulch, plastic film mulching, mulching ridge, ridge of the five kinds of different measures of
conservation tillage experiment, observe ground temperature,soil nutrients,soil moisture,yeild
and soil and water loss.
描述:
g Bu between Yong Le
and Zheng Tong. He had participated in the third recession of ,Ming Dynsty called troops back from An Nan(The Fouth and Fifth Chapter) and
affirms his role on the the mutation relationship between Ming Dynasty and An Nan.
Luo Rujing took an important part in the development of Shan Xi
Military-Farmsettlement for ten years. He had made enormous contribution on Shan
Xi Military-Farmsettlement's restoration and water conservancy facilities
management. Compared with the later period of Yong Le, Shan Xi military farm
settlement has restored greatly on a stage as intermediate period of Xuan De. With
Luo Rujing's absent from Shan Xi, Military一Farmsettlement in northwest of Ming
Dynasty degraded obviously.
"Paeificated Jiao Zhi, Carried out the mission successfully" and had come into
ShanXi four times to manage in the opening up wasteland and "He contributes in
many aspects".
描述:
t Chinese social security
lde
迁︸﹄U
system review
design can not
research on China's new social security system and change the system
replaced with the role and si加ficance.China is a country with a "big
描述:
ed. While the life style is the reality show of productive forces and
productive relations ,which is considered as "life is how "and "how to
live" .This article studies the influence of production practice to life style,