INFILTRATION DYNAMICS UNDER VARIOUS RANGELAND TREATMENTS ON UNIFORM SANDY-LOAM SOILS IN SOUTHEASTERN UTAH

Studies were made, over a 3- to 8-yr. period, of mean seasonal and yearly changes in infiltration rates under various rangeland management practices within the pinyon-juniper (Pinus spp.-Juniperus spp.) type. Results of the study indicate that mean upper limits in measured infiltration rates range from a surprising 1.37-3.47 times the mean minimal rates, each mean value representing from 6-20 replications for a given sampling date. Soil biology may be important in determining seasonal trends in infiltration rates, as well as overwintering freeze-thaw activity. Suggestions are given for sampling infiltration rates. © 1979.