Paper presented at the 1985 Summer meeting of the American Society of Agricultural Engineers; 1985 June 23-26; Michigan State University, East Lansing, MI, St. Joseph, MI : American Society of Agricultural Engineers, 1985. 11 p. (Microfiche No. 85-5033), The area of expert systems, a branch of artificial intelligence, is one of the latest computer-based problem solving techniques which is gaining acceptance in agricultural decision-making. Problems which were here-to-fore unsolvable by formal, structured, algorithmic computer programs can be solved using the heuristic and symbolic knowledge incorporated in an expert system. A good expert system can make decisions or give advice equivalent to those of a human expert in a specific area of expertise.