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Adrought is commonly understood as a prolonged and abnormally extreme dry spell in a region's climate in which there is an extended absence of rains. In this vein, meteorologists define drought in terms of the extent and severity of rainfall deficiencies. Agriculturalists define drought in terms of its impact on agricultural production, while hydrologists compare ground water levels, and sociologists define it on social expectations and perceptions. The three main types of drought are: meteorological drought, which is brought about when there is a prolonged period with less than average rainfall; agricultural drought, which is defined as a condition when there is insufficient moisture for the raising of sufficient livestock or crops due either to soil conditions or the agricultural techniques under use, in spite ...

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