Soil loss is a function of six factors, i. e. rainfall, soil erodibility, slope length and steepness, crop and soil management(Wischmier and Smith,1978).

• 土壤流失是6项因子的函数，即降雨、土壤耐蚀性、坡长和坡度以及作物和土壤管理（Wischmier和Smith,1978）。