在水稻生长季节 ,测量了多种中国南方水田土壤的有关参数 ,给出了部分典型南方水田土壤机械组成、含水量、土壤强度和软泥层深度的数据。用模糊聚类方法 ,按有关水田土壤强度参数 ,将中国南方 16种典型水田土壤在λ =0 75的水平上聚成 4类 ;按软泥层深度将 18种典型水田土壤在λ =0 80的水平上聚为 7类。 During the rice growing season, the relative parameters of soils in paddy soils in southern China were measured and the data of soil mechanical composition, water content, soil strength and depth of soft soil in some typical southern paddy fields were given. Using fuzzy clustering method, according to the soil strength parameters of paddy field, 16 typical paddy soils in southern China were clustered into 4 classes at the level of λ = 0 75; 18 typical paddy soils at λ = 0 80 The level of aggregation for seven categories.