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A laboratory analysis showed that a silt loam soil contained 4 meq Na⁺/per 100g soil. Soil pH = 8.7 and CEC = 15 meq/100g soil. The exchangeable K⁺ percent is 4%. What is the ESR of this soil? Determine the amount of CaSO₄·2H₂O needed to reduce the exchangeable Na⁺ to 5% in the surface foot of soil.

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Category:- Chemistry
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