Soil erosion potential of former Conservation Reserve Program sites
1998
Gilley, J.E. | Doran, J.W.
Conservation Reserve Program (CRP) areas that are returned to crop production wi ll initially be much less erodible than fields which were farmed using conventio nal practices. In this study, a rainfall simulator was used to measure runoff an d erosion from former CRP areas in Mississippi, Nebraska and South Dakota over a pproximately a two year period. Soil loss rates measured immediately following t illage on each of the three sites were similar to values obtained on the undistu rbed CRP treatments. However, when left in a fallow condition, the erosion-reduc ing effectiveness of the sod appeared to have lasted less than one year. The rap id increase in soil erodibility following tillage was attributed to a reduction in surface cover and organic material. The WEPP and RUSLE models are currently u sed extensively in conservation planning and assessment. The experimental data c ollected in this study were used to derive selected parameter values for use in these models.
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