Abstract
ABSTRACT AMULCH surface cover on sandy soils will reduce wind erosion, in-crease soil moisture storage, improve dry aggregate stability, and increase crop yields. The percent soil surface covered with varying amounts of cotton gin trash, wheat, and sorghum stubble was determined. The percent soil cover was used to develop a mulch coefficient (100 percent soil cover equals a mulch coefficient cf 1.0). The mulch coeffi-cient was related to soil moisture stor-age, crop yield, evaporation, wind ero-sion loss, and runoff using the results of this study and previous research by other scientists. A mulch coefficient of 0.6 to 0.8 was sufficient to control wind erosion and runoff. Good soil moisture storage, evaporation reduction, and crop yields have been obtained with a mulch coefficient of 1.0.
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