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Effects of Agricultural Activities on Runoff, Sediment and Erodibility of Purple Soil From Sloping Cropland Effects of different nutrition management on vegetable growth and runoff characteristics of soil nitrogen in perennial vegetable field Variation characteristics of runoff coefficient of Taizi River basin in 1967-2006. Runoff and sediment processes and anti-erosion effects of grass-covered earth road in loess hilly region. Effects of Soil-and-Water Conservation by Planting Herbals on the Sloping Red Soil Land of an Orchard Runoff Changes in Chinese Fir Plantations at Different Age Classes,Huitong,Hunan Province