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Soil Response to Trampling Under Intensive Rotation Grazing¹

ABSTRACT

The impact of short-term, high intensity livestock trampling on selected properties of a silty clay soil was determined at the Texas Agriculture Experiment Station located near Sonora, TX. Intensive livestock trampling typical of multi-pasture rotational grazing systems had a negative impact on soil physical properties. The deleterious effects tended to increase as stocking rate increased. Trampling on dry soil caused disruption of naturally occurring aggregates and compaction of the surface soil layer. Trampling on moist soil deformed existing aggregates and led to the creation of a flat, comparatively impermeable surface layer composed of dense, unstable clods.

¹ Published with approval of the Director, Texas Agricultural Experiment Station as TA-21002. Supported in part by USDA, Soil Conservation Service RCA Special Study no. 58-7442-4-2800 and USDA, Science/Education Grant no. 83-CRSR-2-2268.

² Authors are presently environmental research scientist, USA-CERL, Environmental Division, P. O. Box 4005, Champaign, IL 61820, technician and professor of watershed management, Dep. of Range Science, Texas A&M Univ., College Station, TX 77843, and research associate, Texas Agricultural Experiment Station, Sonora, TX 76950. At the time of research, the senior author was Graduate Research Assistant, Dep. of Range Science, Texas A&M Univ.

Received for publication October 7, 1985.

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