Experiments to Determine Rate of Evaporation from Saturated Soils and River-Bed Sands

Abstract
Much study has already been given by various investigators to the loss of moisture from soils by evaporation, as well as the effect of mulches .in retarding or preventing this loss.‡ The moisture content of the soil, which is held in capillary form, is least at the surface where the evaporation occurs, and leaves there a deposit of such salts as were dissolve d in the soil moisture. Heavy Western soils, which usually carry alkaline s alts, have the greatest capillary attraction; that is, such soils will bring moisture to the surface from greater depths but at a slower rate than the sandy or the lighter soils.

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