Amelioration and management of soils irrigated with sodic water in the arid region of India
1994
Joshi, D.C. | Dhir, R.P.
Field studies at five locations on farmers fields irrigated with residual sodium carbonate water (RSC) indicated that gypsum applications at the rate of 100% of the gypsum requirement of soil plus the quantity of gypsum required to neutralize RSC in excess of 4 mEq/l decreased SAR values, and improved infiltration rate, crop emergence and wheat grain yields. The soil pH decreased by 0.3-0.4 units. Once soils have been ameliorated by this treatment, further small applications of gypsum are needed to decrease the RSC in irrigation water and avoid further soil deterioration.
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