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Characterization of Compacted Soil Using Sorptivity Measurements¹

ABSTRACT

Research was conducted on reconstructed soil cores compacted at varying levels of water content and static pressure. The pressure levels were chosen in an effort to simulate the static conditions that might occur during field cultivation and forest logging operations. Sorptivity, S_o, and void ratio, e, were measured from the soil cores. The statistical analysis showed that both sorptivity and void ratio showed similar responses to different degrees of soil compaction and there was a correlation coefficient of 0.89 between S_o and e. The result also showed that sorptivity was more sensitive to the change in soil structure than in soil-water content.

¹ Contribution of Dep. of Forestry and Plant and Soil Sci. Dep., Southern Illinois Univ. (SIUC), Carbondale, IL 62901.

² Graduate Research Assistant and Associate Professor, Dep. of Forestry. The senior author is now a Forester with the U. S. Forest Service at the North Central Experiment Station, Bedford Office, IN. The second author is now with the Dep. of Plant and Soil Sci., SIUC.

Received for publication May 24, 1985.