On the bases of the soil particle,fractal dimension and EPIC model,the effects of planting Herba andrographitis hedgerows on soil fractal feature and soil erodibility on sloping cropland of the Three Gorges reservoir area were studied.The results showed that: The hedgerows had a significant effect on interception of soil clay particles on slope,clay particles reached an enrichment around the hedgerows,and soil clay particles contents increased;Soil fractal dimension was correlated positively with silt and c...