Formulated fertilizer, as the name suggests, is a fertilizer tailored to the specific needs of crop growth and soil characteristics. It is different from the traditional universal fertilizer, but the scientific proportion of nitrogen, phosphorus, potassium and other major nutrients and trace elements, in order to maximize the precise needs of crops in various growth stages of nutrients. The state vigorously promotes the implementation of formula fertilizer, aiming to improve agricultural production efficiency, reduce environmental pollution caused by excessive use of fertilizer, and promote sustainable development of agriculture.