Abstract: Soil-Crops is a complicated system. Factors that influence the quantity and quality of crops appear to be a completeness result of different effects, which cover the nature of crops themselves, fertilization of soil and other environmental conditions, etc. By experiments and experiences, the rules of governing the balance of nutrition components in crops have been studied, and the mathematical models and database for high yield crops been established,with which practical technical' instruction can be given out. As a CNBGA, it has been successful carried out in computer.