Abstract
AbstractWater yield values are given for 35‐cm columns of two soil types, Ramona and Yolo loam. Three to four surface cm of water were withdrawn from the columns in periods of about a week, using 900 cm of water tension. Simultaneous tension values are given for four locations along the column during wetting and drying periods. Some effects of preparing the disturbed soil samples and of length of soil column are indicated.A method is suggested for calculating capillary conductivity by the use of data obtained during transient changes of moisture content and tension in a soil column. Values for Ramona loam are calculated for a tension range of 76 to 627 cm of water. Although the method is not precise, conductivity values are obtained with less complicated equipment and in a shorter time than is possible by the use of previously described methods. Capillary conductivity values seem to vary with tension independent of tension gradients.
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