| environ. | soil structure The combination or aggregation of primary soil particles into aggregates or clusters, which are separated from adjoining peds by surfaces of weakness. Soil structure is classified on the basis of size, shape, and distinctness into classes, types, and grades | 土壤结构 (原始土壤颗粒的聚集总数，由于表面薄弱，它们被从邻近的土壤自然结构体中分离。土壤结构基于大小，形状以及不同而被分成类别，类型和等级。) |