An experiment under simulated rainfall in situ was carried out to find the relationship between the properties of soil and P loss in surface runoff at 6 sites by SPSS stepwise regression analysis method.The results showed that the average initial surface flow,flows lasts,amounts of runoff and rate of flow were not obviously differences.The fluctuation of runoff intensity in dry season is larger than rainy season.The initial and average runoff intensity of C-2,which is sandy clay loam(Yuanbao village,Dayu to...