Arnon, D.I. And D.R. Hoagland (1940). Crop production in artificial cultures solutions and in soil with special reference to factors influencing yields and absorption of inorganic nutrient. Soil sci.50:463-483.
Akhtar, M.S., Khan A.H. And Ahmad, N. (1988). Effect of salinity sodicity interaction on growth and leaf composition of cotton. Pak. J. Agric. Res.9: 458-462.