Abstract
Some factors relating to soil erosion were analyzed on the purpose of conservation of sloping farmlands with USLE at Ansai district in the Loess Plateau, China. The results indicated that the rainfall and runoff factor R of USLE is lower than 100 tf-m2/ha-h. The soil erodibility factor K of the Loess was relatively large value. The topographic factors Ls of sloping farmlands were very large value. These factors indicate that a serious erosion is caused by not only rainfall but also by characteristics of soil and landuse on hill-slopes in the Loess Plateau. The conditions of the surface and subsurface of the hill-slopes were also investigated. The result indicated different conditions by the direction of the slope. For example, soil moisture of north faced slope was higher than that of south faced slope, but soil hardness of north faced slope was lower than that of south faced slope. These differences are caused by meteorological factors and influence soil conservation on hill-slopes.
