The objective of this study was to tracking the annual and seasonal variations in the chemical properties of El-Salam canal water at the area of Sahl El-Tina (north Sinai), during the winter and the summer of the two growing seasons of 2011/2012 and 2012/2013. Chemical and elemental properties analyses were carried out to water samples, which collected along the main source of irrigating crops from El-Salam Canal at Sahl El-Tina area, and their average values were calculated and then The obtained data showed that: pH values varied from 7.39 to 7.81 indicating that the irrigation water samples of El-Canal were slightly alkaline. pH mean value was more in the season of 2012/2013 (pH≈ 7.79) than the season of 2011/2012 (pH≈ 7.42). Also pH values were more at summer season than winter season during the season of 2011/2012 and the contrary trend was observed during the season of 2012/2013. Electrical conductivity (EC) values of El-Salam Canal water, at Sahl El-Tina area, ranged between 1.63 and 3.77 (dS/m). Their values were 2.70 and 2.12 (dS/m) for the seasons of 2011/2012 and 2012/2013, respectively. During 2011/2012 EC (dS/m) values were more in winter than in summer and the contrary trend was noticed during 2012/2013 growing season. The type of irrigation water may be considering medium saline irrigation water and can be used in light textured soils, which have a good drainage systems. Soluble ions of Na + and Cl increased progressively with increasing EC levels in the irrigation water at the growing seasons 2011/2012 and also at the growing seasons 2012/2013. As for the annual variations of soluble ions, concentrations of all soluble ions (meq/l) except Mg ++ and HCO3 increased at the season of 2011/2012 than at the seasons of 2012/2013. Seasonal variations during the growing season of 2011/2012 showed that, all concentration (meq/l) of soluble ions increased at winter season than at summer season, except K + behaved contrary trend. During 2012/2013, all soluble ions increased at summer season comparing with winter season, except Mg + + and HCO3 behaved contrary trend. These variations can be due to increasing agricultural activities and rainfall, increasing in the leaching processes in some locations and high evaporation, as a result to high temperature. Sodium adsorption ratio (SAR), is usually used to evaluate the relatively hazards of Na + ion which associated with the irrigation water supply on soil properties. Throughout the season of 2011/2012, SAR was decreased at summer than at winter. While opposite trend was noticed through the growing season of 2012/2013. As for the annual variations in SAR values, data indicated that SAR decreased at 2011/2012 than at 2012/2013.But in general SAR ranged from 6.15 to 12.52 throughout the two seasons of growth of the current investigation study. These types of water can be used for irrigate
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