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Research ArticleResearch

Cover crop impacts on watershed hydrology

Seth M. Dabney
Journal of Soil and Water Conservation July 1998, 53 (3) 207-213;
Seth M. Dabney
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ABSTRACT:

Cover crops alter many aspects of the hydrologic cycle. They increase evapotranspiration while growing and can enhance water infiltration into soil, slow runoff rates, and reduce soil erosion in both conventional-till and no-till systems throughout the year. However, the difference between the results of plot and watershed studies demonstrate that caution should be taken in extrapolating plot data to watershed scales. As scale increases, so does the influence of hydraulically-controlling subsurface soil horizons. Unfortunately, most of the available cover crop research comes from relatively small plats and very few watershed studies have been initiated in recent years. Perennial cover crops offer the potential for altering the porosity of subsurface soil horizons so as to increase future soil productivity and reduce future runoff amounts and rates.

Footnotes

  • Seth M. Dabney is a research agronomist, USDA-Agricultural Research Service, National Sedimentation Laboratory, Oxford, MS.

  • Copyright 1998 by the Soil and Water Conservation Society

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Journal of Soil and Water Conservation: 53 (3)
Journal of Soil and Water Conservation
Vol. 53, Issue 3
Third Quarter 1998
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Cover crop impacts on watershed hydrology
Seth M. Dabney
Journal of Soil and Water Conservation Jul 1998, 53 (3) 207-213;

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Cover crop impacts on watershed hydrology
Seth M. Dabney
Journal of Soil and Water Conservation Jul 1998, 53 (3) 207-213;
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