تلخیص
A field study was carried eut en a nen-saline nen-sedic silt leam seil, Marginal quality tubewell water was used fer irrigatien with and witheut gypsum treatments. Gypsum applicatien in beth the fermsincreasedthe infiltratien rate significantly whereas it decreased by the use ef pure tubewell water ef marginal quality. No. siginificant effect was ebserved en ECe ef seil. The SAR ef seil censiderably increased ever a peried ef three years where pure tubewell v.ater was used but it decreased in gypsum treated plots. Mere salts were accumulated in the upper 15cm seil layer as cempared with lewer layers. On an average 2.13 and 9.52% in wheat yield and 15.54 and 4.31% increase in paddy yield was ebserved when water was applied through gypsum ·bed and powdered gypsum applied in the field as cempared with centrel. The highest benefit cost ratio. ef 1.95 was ebtained when water was applied through gypsum bed laid dewn in the waterceurse
Muhammad Ramzan Chaudhry, , * Abdul Hamid and Muhammad Afzal Javed ** . (1983) IMPROVING SODIC WATER WITH GYMPSUM FOR CROP PRODUCTION I. , The Journal Soil & Environment , Volume 1, issue 3.
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