ABSTRACT:
Three soil series were evaluated for their dispersibility, an indicator of erodibility. They included the weakly developed Atwell, the moderately developed Hugo, and the strongly developed Sites. Changes in dispersion were measured after treatment with ash leachate, which simulated the ash produced by burning slash, and heating to 350°C (662°F). Ash leachate promoted dispersion in the strongly developed soil. Heating reduced dispersion in all three soil series and had the greatest effect on the strongly developed soil. The difference was attributed to the strongly developed soils having more hydroxides and pH-dependent charge than weakly developed soils.
Footnotes
Philip Durgin is a research geologist with the Pacific Southwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture, Berkeley, California, located at Arcata, California 95521.
- Copyright 1985 by the Soil and Water Conservation Society
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