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The Effect of Lime and Organic Matter on the Erodibility of Cecil Clay¹

ABSTRACT

The addition of lime to Cecil clay under field conditions reduced the permeability and had a dispersing effect on the soil aggregates. It would be expected to increase the susceptibility of the soil to erosion. Applications of organic matter up to four tons per acre had little effect on porosity after six months and no significant effect on aggregation or permeability after eighteen months. Single applications of organic matter in amounts consistent with practical fertility requirements did not materially alter the structural properties of Cecil clay. Lime applications to Cecil soils should be made in amounts needed to satisfy nutritional requirements, but excessively heavy applications should be avoided. It is probable that the increased plant coverage resulting from small applications of lime will far overbalance the tendency of lime to increase susceptibility of soils to erosion.

¹ Contribution of the Soil Conservation Service, Section of Soil and Water Conservation Experiment Stations, U. S. Dept. of Agriculture, Washington, D. C., in cooperation with the South Carolina Agricultural Experiment Station.

² Soil Technologist, Junior Soil Technologist, and Agricultural Aide.