Abstract
For a forest Haplic Arenosol the retention curve and saturated hydraulic conductivity were experimentally determined. On the basis of experimental data there were evaluated the parameters of a retention curve in accordance with van Genuchten model and then Dexter’s physical quality index. Next, the hydraulic conductivity for the full range of soil water potential and soil water content was calculated for each soil horizon using the Mualem model. Saturated hydraulic conductivity was not statistically differentiated throughout the soil profile, and its mean value was 180 µm s–1. Hydraulic conductivity radically decreased as the water content decreased, more slowly in the mineral horizons and more rapidly in the organic one. For the discussed sandy soil a high value of Dexter’s index of soil physical quality was not related to the existence of aggregate structure. The Dexter’s index should be tested further on a large group of sandy and organic soils.
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