eng Ansari Education and Research Society Journal of Ultra Chemistry 0973-3450 2319-8036 April 2010 6 1 113 117 juc 642 article K.C. Patel 1 K. B. Vyas 2 M.V. Hathi 3 R.R. Mehta College of Science & C.I. Parikh College of Commerce, Palanpur (INDIA) Sheth L.h. Science College, Mansa (INDIA) <p style="text-align: justify;">In arid and semi arid area, irrigation is very essential for successful agriculture. Quality of irrigation water is an important factor of crop production. Whatever may be the source of irrigation water, some soluble salts are always dissolved there in these are mostly sodium, calcium, magnesium and some time potassium as cations and chloride, fluoride, carbonate, and bi- carbonate or nitrate as anions. Salinity hazard which is associated with high soluble salts in water and measured in terms of electrical conductivity (EC), water having an EC value of more than 2.25 m.mohs /cm² is always unsafe for irrigation use. The alkali hazard is related to the development of alkalinity in the soil and is expressed as SAR Residual Sodium Carbonate is an indirect expression of CO₃^-2 and HCO₃^-1 of Na⁺ in ground water. Based on the RSC value the irrigation water are classified in conclusion.</p> <p>&nbsp;</p> https://journalofchemistry.org/paper/642/ Water Quality Salinity, SAR RSC