Water is fundamental for life and essential for nearly every human endeavor. As far as we know, Earth is the only part of the Universe where liquid water exist in substantial quantities. Oceans, lakes, rivers, glaciers and other bodies of liquid and solid water cover more than 70% of Earths surface, with total amount of more than 1.404 million km3 (370 billion gal). The present book is an attempt to attract the attention to the Earths major components: the water and land with respect to their types, distribution, utilizations, management and conservation. Apart from the introduction and list of references, the book comprises five main parts: Part I entitled Water of the Earth with its five chapters namely: water resources, major water compartments of the Earth, water supply and utilizations, increasing water supplies, and water management and conservation. Part 2 entitled Land of the Earth with its five chapters, namely: distribution, croplands, forests, rangelands and deserts. Part 3 entitled Relationships between plant life and water and land resources. Part 4 entitled: Natural Resources of Egypts Deserts with its two chapters: ecological synopsis and desert ecosystem.

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Prof./ M.A. Zahran, M.SC.(1962) and Ph.D.(1965) in the field of Plant Ecology. He worked as research assistant and researcher in the National Research center (1959-1963) and Desert Research Institute(1963-1972) in Cairo. In 1972 he was appointed Assistant Professor and promoted to the professorship in 1976 in Faculty of Science, Mansoura University