Dissolved oxygen (DO) values showed very highly significant differences between the two governorates during winter and autumn, where the highest value of DO was (7.77 ± 0.57 mg/l) during winter, while the lowest was (0.75 ± 0.21 mg/l) during autumn in Giza.
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Biological Diversity Associated with Pesticides Residues in Certain Egyptian Watercourses.
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