Calculation of the Leaching required to Reduce the Salinity of a Particular Soil Depth beneath a Specified Value
1971
Terkeltoub, Richard W. | Babcock, K. L.
Soil columns containing either Yolo silty clay loam or Hanford sandy loam were prepared with vertically nonuniform salt (Na⁺, Ca²⁺, Mg²⁺, Cl⁻) and moisture distributions and with gypsum (CaSO₄ · 2H₂O) present in the surface soil. The columns were irrigated at both fast and slow rates of water application with a water containing Na⁺, Ca²⁺, Mg²⁺, and Cl⁻. A simple method for calculating salt movement in soils successfully approximated the resultant salt profiles. A variation in the salt movement computation method was devised for calculating the leaching required to lower the salinity of a particular soil depth to less than a specified value. The method was experimentally verified on both a Yolo and a Hanford soil column, each with vertically nonuniform initial salt and moisture distributions.
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