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Description: Soil compaction is caused in agricultural soils mainly due to machinery operation. The degree of compaction is known to depend on several factors such as soil type, soil moisture content, contact pressure and wheel slip. Soane (1970) discussed soil properties and load characteristics likely to be involved in compaction under wheels, stressing the difficulties of measuring the components of an applied load. Davies et al. (1973) reported yield studies in which a maximum soil compaction was measured under tractors, working with different wheel loads and levels of wheel slip. Wheel slip was proved in some cases to be a more important cause of compaction than additional wheel loading, and this effect was more predominant for more powerful tractors. Only a few experimental studies have measured agricultural soil compaction as affected by shear strains (e.g. Chancellor 1971). Different soil types, especially those prone to severe compaction damage, need to be studied in order to verify the importance of wheel slip strains in soil density changes. Therefore, the objectives of this study were: (a) To design a pure shear box to apply controlled normal pressures and shear strains to soil samples, and (b) To determine the effects of normal loading together with shear strains on the compaction of certain soils at different moisture contents.

Keywords: laboratory study to determine the effect of slip-generated shear on soil compaction
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Citation: Raghaven, G.S.V. and E. McKyes 1977. LABORATORY STUDY TO DETERMINE THE EFFECT OF SLIP-GENERATED SHEAR ON SOIL COMPACTION. Canadian Agricultural Engineering 19(1):40-42.
Volume: 19
Issue: 1
Pages 40 - 42
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Date: 1977
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Coverage: Canada
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