摘要： 运用逐步聚类法进行农地适宜性评价需要完成一系列工作。首先，要根据种植某种作物的生长需要，选择评价因素，并需对获得这些因素的数据进行正确化、数量化、标准化处理。在这个基础上才能运用数学中的聚类分析，通过编纂程序，进行计算机运算，分出合理的类级，再根据每类聚类中心的高低，决定出每类的土地等级。

关键词: 逐步聚类, 土地适宜性评价

Abstract: The suitability evaluation for farm land by the gradual type convergence method needs a series of work.The evaluation factors should be chosen in acoordance with the growth needs of the crop,and the data for these factors should be corrected,quantified,and standardized.Only on this basis,type convergence analyses can be carried out.Proper types can,be sorted out through programming and computation,and classes for each type of land can be determined according to the location of the convergence center.

Key words: Gradual type convergence, Land suitability evaluation