施用复合肥三注意一种化肥中含有氮、磷、钾三种营养元素中的两种或三种的叫做复合肥。复合肥的种类很多，如氮磷复合肥、氮钾复合肥、磷钾复合肥等。复合肥的施用方法和作物吸收利用各有不同，因此，在施用时须注意以下事项：１、含铵态氮的复合肥，如磷酸铵等，不可与草... Application of three fertilizer Note that a fertilizer contains nitrogen, phosphorus and potassium three kinds of nutrients in two or three are called compound fertilizer. Many types of compound fertilizer, such as nitrogen and phosphorus fertilizer, nitrogen and potassium fertilizer, phosphorus and potassium fertilizer. Fertilizer application methods and crop absorption and utilization are different, therefore, in the application should pay attention to the following matters: 1, ammonium nitrogen containing compound fertilizer, such as ammonium phosphate, not with grass ...