This paper standardizes the operation of rapeseed production including variety choosing,field preparation,mechanical seeding,field management,mechanical harvest
We took the iron-efficient and iron-inefficient soybean varieties with significant differences in iron efficiency as the test materials,in order to ascertain th
After the Miao insurgence in the Qianlong and Jiaqing periods,the government of Qing Dynasty directly raised four separate subprefectures to the independent sub