Blending fertilizer is two or more granular high nutrient raw materials. It is particularly suitable for areas with large land areas and complex soil types and a wide variety of crops. The unit fertilizer or compound fertilizer as raw material is made by simple mechanical mixing without significant chemical reaction in the mixing process. There are two production processes of compound fertilizer, one is called compound fertilizer produced by physical mixing method, and the other is called compound fertilizer formed by chemical reaction of minerals containing nitrogen, phosphorus and potassium.

Blend fertilizer production technology is simple, in the United States, the blending operation and fertilization operation as far as possible on the same day, in this case do not need to consider the storage performance of the product. In many countries, blended fertilizers need to be packaged and stored for a period of time, so the storage performance of the product is very important. All raw materials should be dry particles uniform and high strength, to prevent the product in the storage and transportation process of water caking and particle separation, which is mainly divided into regional small-scale production, built in the port area or transportation center area of large-scale production and production by the basic fertilizer production plant.

Compound fertilizer has high nutrient content, few side components and good physical properties, which plays an important role in promoting high and stable yield of crops. If the concentration varies greatly, attention should be paid to selecting the appropriate concentration to avoid direct contact with seeds and fertilizers, otherwise it will affect seedling emergence, even burning seedlings and rotten roots. If the ratio of compound fertilizer to raw materials is different, attention should be paid to the application range of nutrient components. Different brands of different concentrations of compound fertilizer used different raw materials in production should be selected according to the type of soil and crop types, otherwise it will reduce fertilizer efficiency and even poison crops. During application, surface spreading shall be avoided as much as possible and soil covering shall be deeply applied.