The principle of the supply of formulated fertilizers: According to the area and regional division of the main crop varieties in each county, the rational formula that has been developed, according to the principle of "large formula, small adjustment", fully considers the feasibility of mass production, and optimizes the fertilizer formula , The provincial soil fertilizer technology department announces the formula to the society through the media, guides the production and supply of formula fertilizers, and guides farmers to apply formula fertilizers scientifically and reasonably.

Reasonable application of formula fertilizers: On the basis of nutrient demand and supply balance, adhere to the combination of organic fertilizers and inorganic fertilizers, adhere to the combination of large elements, medium elements, and trace elements; adhere to the combination of base fertilizer and top dressing. After determining the amount of fertilizer and fertilizer formula, the focus of reasonable fertilization is to choose the type of fertilizer, determine the fertilization period, proportion and fertilization method.

Types of formulated fertilizers: Determine the types of fertilizers based on comprehensive factors such as soil properties, fertilizer properties, crop nutritional properties, fertilizer resources, etc. You can choose simple or compound fertilizers to prepare formula fertilizers by yourself, or you can purchase formula fertilizers directly.

Fertilization period: According to the nature of the fertilizer and the nutritional characteristics of the plant, apply fertilizer at the right time. Fertilization should be emphasized during the critical period of vigorous plant growth and nutrient absorption. Areas with irrigation conditions should be fertilized in stages. The recommended amount of nitrogen fertilizer for crops at different periods should be determined, and real-time monitoring technology should be established and used in areas with conditions.

Fertilization method: The commonly used fertilization methods include tillage after spreading, strip application, hole application, etc. The appropriate fertilization method should be selected according to the type of crop, the cultivation method, and the nature of the fertilizer. For example, formula fertilizers are generally used as base fertilizers, and after spreading, they are combined with soil preparation and turned into the soil.