الفهرس 
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Abstract
This work aims to study the combined effect of different levels of both salinity and Nitrogen fertilization on some physiological and chemical aspects in cotton as well as the yield. The experiments performed in both seasons deal with growing cotton plants at different salt concentrations and with different doses of Nitrogen supply the salt is a mixture of Sodium Sulphate and Sodium Chloride. The Nitrogen is added in the form of Ammonium Nitrate. The salt mixture and Nitrogen fertilizer are added in portions to soil with irrigation water. Phosphorus and Potassium are added to soil before sowing. It is found that both the 0.4% and 0.8 % salt concentration, especially the latter one lead generally to an inhibiting effect, compared with the control, on each of the following growth criteria: length of main stem, average number of green leaves per plant and dry weight of different organs i.e. leaves, stems, roots and reproductive organs.