Abstract
Nine years of infiltration measurements were made over a 12-yr. period on a big sagebrush ( Artemisia tridentata) site in southern Idaho that was plowed and seeded in the fall of 1968. Results of the study thus far indicate that plowing caused an initial significant decline in infiltration rates. Grazing, started in 1970, did not further reduce infiltration but seasonal trends were eliminated and there was no recovery of infiltration. Exclosures indicate it would take at least six years for complete recovery of infiltration rates, assuming no grazing. Suggestions are given for the use of deterministic models in predicting infiltration rates based on grazing intensity.
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