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WWRC 92-22
Allowable Soil Loss Tolerances for Rangelands Based on Sustained Plant Production and Stream Quality


The relationship between ground cover and water erosion on upland rangelands was investigated. Sites were selected with different surface cover from 0 to 100% and these sites received a simulated rainfall event. A rainfall simulator was used to apply a high intensity (97.1 mm/h), short duration (5 minute) rain storm to two similar plots. Sediment leaving the plots was collected and used to determine sediment eroded as a function of percentage of ground cover. A graph of ground cover versus sediment yield showed that if ground cover was maintained above 30%, then the soil loss tolerance for poor soils (2.2 mt.ha-1) was maintained.

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