Soil testing and formula fertilization technology is based on soil testing and fertilizer field trials. Based on the laws of crop manure requirements, soil nutrient performance and fertilizer effects, on the basis of rational application of organic fertilizers, nitrogen, phosphorus, potassium and trace elements are proposed. The amount of fertilizer applied, the period of fertilization, and the method of application. In layman's terms, it is the scientific application of formula fertilizer under the guidance of agricultural science and technology personnel. The core of soil testing and formula fertilization technology is to regulate and solve the contradiction between crop demand fertilizer and soil fertilizer supply. At the same time, we need to supplement the nutrient elements needed for crops. What elements will be added to crops will be supplemented with what elements and how much it will need to be supplemented to achieve a balanced supply of nutrients to meet the needs of crops; and to increase the use of fertilizers and reduce the use of crops to increase crop productivity. Output, improve the quality of agricultural products, save labor, save money and increase revenue.
The construction of the evaluation index system is an important part of the soil testing and fertilizer application system, and is the main method for screening and verifying soil nutrient testing methods. Analyze the fertility, acidity and alkalinity, microbes, etc. of a certain area according to scientific methods (mainly applying chemical analysis methods), and finally sum up crop types suitable for planting in the area or fertilizers for the crops planted in the area. Need for scientific conclusions. It is an effective means to improve land use efficiency and scientific farming.