The function and approach of returning straw

The process of agricultural production is a process of energy conversion. During the growing process, crops need to continuously consume energy, but also need to continuously replenish energy. It is necessary to constantly adjust the content of water, fertilizer, gas, and heat in the.......

Analysis of top coal mining under water

Mining coal mining method used at 1.1 Water

The mining method under the water body is deep and shallow, first and then near, first adopting the location of thick water-sparing layer and the location of the later-collect.......

46 kinds of foreign patent pesticides expire within 5 years

At the Asia-Pacific Summit on Agricultural Chemicals held in Shanghai recently, Zhang Weibo, Deputy Minister of Chemical Patent Examination Department of the Patent Office of the State Intellectual Property Office stated that from 2011 to 2015, there will be 46 foreign pesticide pesticides.......