Reclamation response of two different textured saline-sodic soils to ECIW to SARIW ratios
2001
Ghafoor, A. | Nadeem, S.M. | Anwar-ul-Hassan | Sadiq, M. (University of Agriculture, Faisalabad (Pakistan). Dept. of Soil Science)
A lysimeters experiment was conducted to evaluate the effect of different ratios of electrical conductivity (ECiw) to sodium adsorption ratio (SARiw) of irrigation water to reclaim different textured saline-sodic soils. The ECiw:SARiw ratios were 4:1, 2:1, 1:1, 1:2 and 1:4 at ECiw of 6 or 12 dS m- 1. The total water applied was equal to 3 pore volume in three equal splits. The results indicated that at both the ECiw leachates volume increased with an increase in ECiw:SARiw. The EC and SAR of leachates remained statistically higher where ECiw:SARiw ratios of the leaching solutions were lower than 1:1. The ECc, pHs, and SAR decreased with all the treatments, decrease being statistically more with ECiw:SARiw ratio up to 1:1 or higher and was lower for loamy clay than that for the clay loam soil. The saturated hydraulic conductivity (Ksat) decreased with a decrease in ECiw:SARiw and vice versa and was statistically higher for clay loam than that for the loamy clay soil. It is concluded that better ECiw:SARiw ratios were up to 1:1 for reclaiming clay loam and loamy clay soils at both the ECiw levels of 6 and 12 dS m-1.
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