NRCS National Geospatial Development Center

The NGDC is a collaboration between the NRCS and WVU.

Conservation Model

Background material

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The infiltration/runoff model compares agricultural management systems by showing runoff and infiltration from undisturbed surface soil samples.

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The runoff water from conventionally tilled soils tends to have more sediment in it than that of soils from no-till/conservation planted fields due to the lower organic matter content and fewer organic glues present in the soil.

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During times of the year when macropores (large holes) in the soil are open, there is more infiltration into a less disturbed soil. Earthworms and other soil organisms continually aerate the soil by creating large and small holes for air and water to travel into and through the soil.