When rainfall is insufficient, irrigation would be necessary to cover the water needs of crops. But irrigation has disadvantages as it has advantages. Among the risks of irrigation was irrational use of fertilizers causes nitrate pollution and soil and ground water, the pollution by nitrates which convert to nitrites causes diseases that are fatal in some cases in newborns. In recent decades, the research in this field of irrigation has become increasingly important because the environment and human life has become threatened. A thanks to different laboratory analyzes polluted and unpolluted areas were delimited to derive an action plan to fight against this pollution. Most area residents drink groundwater, then treatment of that water is essential to prevent several diseases caused by pollution of the water table.
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