Runoff and Erosion as Affected by Corn Residue: Prt II: Rill and Interill Components

HYDmRA 州ULl 山IC a 削nd s 州O 创讪i 诅1 lossω 阳岱s va盯aria under simulated rainfall conditions at selected downslope distances on plots with corn r巳sidue rates ranging from 0.0 ∞o tωa 6.7η3 tνfha. Application of corn residue produced substantial reductions in runoff rate , runoff velocity , sedim巳nt concentration and soil loss rate along the entire slope length. On those plots subject to rilling , runoff rate , sediment concentration and soilloss rate usually incr巳ased with downslope distance. Rill and interrill sediment concentration and soil loss rate were also measured at selected slope lengths. lnterrill sediment concentration changed little with downslope distance while greater interrill soil loss rates were observed with increasing slope length. Rill sediment concentration and soil loss rate increased rapidly near the bottom of the plots.