For those who develop or use knowledge-based agricultural systems, Plant and Stone start with the basic principles of rule-based expert systems, and then explain how these systems can be applied to the rule-based diagnosis of plant crop diseases, the linking of simulation models to expert systems to determine optimum planting dates, designing and testing pest management strategies using a hybrid simulation and rule-based irrigation scheduling, and model-based reasoning systems to diagnose plant stress. Annotation copyright Book News, Inc. Portland, Or.