六 作物种植和管理因子(C)前已指出,土壤流失公式的基本数值是连续耕作休闲地上的年平均土壤流失量.这个基本数值是在特定田间条件下用R、K、L和 S项的乘积定量地表示出来.但是当田地种植了作物,土壤流失量就会减少,因为它提供了地面免受侵蚀的保护.而休闲地则是很少保护或没有保护的. It has been pointed out earlier in the Six Crops Cultivated and Management Factor (C) that the basic value of the soil loss equation is the annual mean soil loss for continuous tillage and recreation. This basic value is calculated using the R, K, L and S terms under certain field conditions The product is quantified, but when the crop is planted in the field, the amount of soil loss is reduced because it provides ground-level protection from erosion, while leisure is less or no protection.