Co-Authors:
Agassi, M., Soil Erosion Research Station, Ruppin Institute, P.O. Emeq Hefer, 60960, Israel
Shainberg, A.I., Institute of Soils and Water, ARO, The Volcani Center, Bet Dagan, 50250, Israel
Morirfi, J., Soil Erosion Research Station, Ruppin Institute, P.O. Emeq Hefer, 60960, Israel
Abstract:
The effect of changes in rainfall energy and water salinity, during a continuous simulated rainstorm, on seal properties was tested in a silty loam soil (Calcic Haploxeralf) with medium (9-0) and low (2 • 5) exchangeable sodium percent (ESP) values. Saline water (EC = 5 - 6 dS m-1) and distilled water were rained at two energy levels: high energy with kinetic energy of 22-9 J mm-1 m-2, and low energy with kinetic energy of <0-01J mm-1 m-2. A seal may be fully or partially developed. The seal formed by a distilled water rain of high energy and sufficient duration is fully developed. A seal formed by rain with low energy, or by high-energy rain of short duration, or by saline rainwater of high energy and long duration, is a partially developed seal. A fully developed seal is stable and its permeability responds only to simultaneous changes in electrolyte concentration and rain energy. Conversely, a partially developed seal is not stable and its permeability responds to changes in electrolyte concentration only. © 1988 CSIRO. All rights reserved.
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