Africa is the origin center of many crops. It is rich in original ecological resources,especially special resources which are excellent materials for breeding r
The routine monitoring of livestock and poultry products is the monitoring work carried out by the Ministry of Agriculture in order to grasp the quality and saf
In order to study the county scale land use structure during the rapid urbanization and more accurately grasp the dynamic process of land use and cover change,w
In view of artificially high urbanization rate of China and possible causes,survey and data analysis methods were used to discuss reform of household registrati
Over the years,the logistics development in Tibet has fallen behind the transport. Since the opening of Qinghai-Tibet Railway in2006,the opportunity for develop