Ammonium is an important nutrient in primary production;however,high ammonium loads can cause eutrophication of natural ......

水是农业的命脉，我国作为农业大国，其整个耕地面积的40％是需要通过灌溉来保证其正常生产。因此，合理开发和调配有限水资源，推广节水灌溉......