THE MOISTURE EQUIVALENT OF SOILS

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Abstract
Increasing the size of the sample employed in the moisture-equivalent method reduces appreciably the water retention in soils of intermediate texture, in which cases the moisture gradient in the soil block is also large. These effects are smaller in very coarse or very finegrained soils. Equilibrium is established very slowly in heavy soils, final moisture distribution being nearly uniform. The water-retaining power of fine silt is emphasized. Reducing size of capillaries in the outside boundary also reduces the moisture retention in conformation to the thermodynamic theory of capillary equilibrium. Replaceable Na in the soil complex gives an abnormally high moisture equivalent.

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