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:
y, military and culture in Ming Dynasty。The research on military
farming of the Ming Dynasty played the vital role of leading as to the
research on the outline the history of the Ming Dynasty. The Military
Farming in three states-- He Min and Tao-in Ming Dynasty, as the
epitome of the Ming Dynasty Northwest military Farming, has its
characteristics. He Min and Tao military farming not only has the
common characteristic of that period, but also has its unique distinguishes,
because which is located at the junction of the Han and other ethnic
groups, within the area lived many ethnic minorities. In this paper, the
author analyzes the relevant historical materials and uses theories and
methods of history and ethnology to explain the origin, development,
characteristics of the military farming. And the author discusses the
reasons why they declined in the later years and the impacts in a detailed
and intensive way. Based on local historical dates and combined with the
same period dates, the article analyze mainly the differences among the
three states from its preparation, operation, function and impact aspects
and deal with the military system of the Ming Dynasty, migration,
defense policy, minority administration and policy, economic strategies.
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:
f the
Qingzang plateau.Gannan is adjacent to Qinghai province in west,to Sichuan province
in south,to the southern of Gansu province in east and to the Loess plateau in
north.Mountainous country and plateau are its major landforms types.It is a highest