Crop Nutrition Diagnosis Expert System

The crops nutrients diagnostic expert system is an agricultural diagnostic expert system, which was founded on TYZ-3 intelligent soil nutrition gauge and controlled by the single chip microcomputer with the C language of MCS-51. After collecting and analyzing several typical crops symptoms of the deficient elements (apple, wheat, corn, tomato, cucumber), We founded a system which can diagnose the deficient elements of these crops and provide some fertilizing plans for them combining the expert system knowledge.This paper briefly summarized the development of the expert system inside and outside country and its application in agriculture. The several key points in the research were highlighted in this paper: the establishing of knowledge base; the designing and using of uncertainty reasoning; the realizing of relative interface and so on. In the establishment of knowledge base, in order to find a good way to represent the knowledge which is fit for our system, we introduced a way to represent our knowledge by the rule branch and the rule number, combining the theory of expert system and on the basis of collecting and summarizing, analyzing the deficient elements of the crops. Considering the using for farmers, the characteristic of this system and it's reliability and accuracy, we adopted the uncertainty reasoning model which included certainty and weight factors. Wesuccessfully established a crops nutrients diagnostic expert system under specific conditions.