Grade of soil pedal structure (grade)

Grade of pedality (soil pedal structure) is estimated as single grain (1), massive (2), weak (3), moderate (4), or strong (5). Pedality influences water flow and transport within soils and may influence susceptibility to erosion (Onweremadu et al. 2007; Williams 1992). Derived from McKenzie et al. (2000). This classification does not necessarily reflect an ordered property of the soil. See HPEDALITY for a hydrological scoring of pedality.土壤团聚性（pedality，又称土壤团聚结构(soil pedal structure)）的分级可分为单粒状（1级）、块状（2级）、弱团聚（3级）、中等团聚（4级）与强团聚（5级）。土壤团聚性会影响土壤内部的水分运移与流动过程，同时可能对土壤侵蚀敏感性产生影响（Onweremadu等，2007；Williams，1992）。该分类体系源自McKenzie等（2000）的研究。需注意，此分类未必能够反映土壤的有序属性。若需查询土壤团聚性的水文评分方法，请参考HPEDALITY数据集。