摘要
运用模糊集理论开发了一个定量评价土壤生产力的数学模型──模糊ＰＩ模型，并应用该模型提出了耕作效果指数的概念和计算方法，通过评价复垦土壤４种耕作处理的耕作效果，得到了令人满意的结果。
Fuzzy PI Model,a mathematical model,was establiched on the base of fuzzy settheory propose
concepte of tillage effective index and calculating methcol by use of the model toevaluate the
tillage effectiveness of four different tillage treatments in reclaimed soil on the surfaceof coal
mine.The results were satisfactory.
