الفهرس 
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Abstract
In many parts of the North Delta of Egypt farmers used drainage water for irrigation as a result of shortage of fresh water in this area. The usage of drainage water in irrigation must be controlled because it may badly contain some pollutants which in turn may caused hazards to soil or grown plants. The present study was carried out during two growing season 1997 and 199711998 to look upon and evaluate the different available sources of irrigation water for irrigation purposes in the studied area, effect of using these sources of irrigation water on some soil physical and chemical properties, heavy metals and micronutrients content in soil and plant as well as yield and yield components of tested crops (cotton, rice, wheat and clover). To achieve the aim of the current study, a field investigation was carried out by chosen eight locations of soil which irrigate with agriculture drainage water or agriculture drainage water mixed with waste water along drain No. 4 (42 km) and its branches (at the beginning of drain No. 4, Derein drain, El- Badrawy drain, before pumping station No. 4, Beialla drain, after pumping station No. 4, drain No. 3 and at the end of drain No. 4) in comparison with two locations of soil which irrigated with fresh water (Bahr Beialla and Bahr El- B anawan) . Every location included two fields which were planted with one of the mentioned crops (cotton Giza 75 or rice Sakha 172) in summer season 1997, followed by (wheat Sakha 8 or clover Mesqawi) crops in winter season 199711998. Before planting and after harvesting the above mentioned crops, disturbed and undisturbed soil samples were taken from the surface layer of soil (0-30 cm) and prepared to chemical and physical analysis. Irrigation water samples were collected periodically from different sources of irrigation water before each irrigation of tested crops. The collected water samples were chemically analysed to investigate and evaluate their qualities for irrigation purposes.