Intelligent fertilization decision support system based on knowledge model and WebGIS: Decision for fertilization

The study constructed the basic frame of decision support system for fertilization. According to the nutrient content of soil on the different soil sampling points and the yield meteorological data and soil data into a database. The system could interpolate soil properties map by the comprehensive evaluation system of soil fertility. Based on the database system and knowledge system, the system can generate prescription facing the peasant and produce prescription map facing the farm by GIS with knowledge model, such as balanced fertilization, goal of yield model and so on. By Web the users will get the fertilization prescription which can guide them precision fertilization. It can not only raise the rationality and reliability of fertilization plan and save fertilizer but also improve economic and environment benefits.