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Abd Elhamid Safwat Elsayed Abd Elkader (Plant Production Department, Ecology and Dry land Cultivation Division. Desert Research Center, Cairo, Egypt, Bugaev Peter Dmitrievich (Plant Production Department, Ecology and Dry land Cultivation Division. Desert Research Center, Cairo, Egypt, Plant Production and Meadow Ecosystems Department, Russian State Agrarian University - MAAA named after K.A. Timiryazev, Moscow, Russian Federation.)
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