P ERMEABILITY of soil is its capacity to transmit water and air. For a program of soil and water conservation, no soil factor is of greater importance. Realizing this importance, as well as the lack of specific information in Virginia, the Virginia Experiment Station and the Soil Conservation Service, U. S. Dept. of Agriculture, in 1945 started cooperative studies of soil permeability as part of a drainage project with certain objectives in mind: A. To determine the relative permeabilities of certain soils in Virginia upon which water relationships are important.
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