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Leaching and Reclamation of a Soil Irrigated with Moderate SAR Waters

Dep. of Environmental Sciences, Graduate Program in Soil and Water Sciences, Univ. of California, Riverside, CA

View larger version (27K): [in a new window]   Fig. 1. Hydraulic conductivity as a function of SAR and electrolyte concentration. Statistically significant differences (P < 0.05) indicated by different letters

View larger version (25K): [in a new window]   Fig. 2. Dispersed clay in the leachates from the columns as a function of SAR and electrolyte concentration. Statistically significant differences (P < 0.05) indicated by different letters

View larger version (31K): [in a new window]   Fig. 3. Swelling as a function of SAR and electrolyte concentration. Statistically significant differences (P < 0.05) indicated by different letters

View larger version (27K): [in a new window]   Fig. 4. Hydraulic conductivity of the soil following a surface application of gypsum (5 Mg ha-1 equivalent) and leached with deionized water

View larger version (39K): [in a new window]   Fig. 5. Internal swelling of the soil following surface application of gypsum or H2SO4 and leached with deionized water. Internal swelling was measured by the amount of water held by the soil at -22 kPa relative to the amount of 100 mmolc L-1 solution held at the same tension

View larger version (27K): [in a new window]   Fig. 6. Hydraulic conductivity of the soil following surface application of H2SO4 (3 Mg ha-1 equivalent) and leached with deionized water. The decrease in hydraulic conductivity immediately following acid application is attributed to a surface skin and trapped gas in the top of the soil