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Canola Brassica napus Seru-4 variety was grown in lyzimeter experiment at Sakha Agric. Res. Station during 2008/2009 season to study the metal accumulation and it's feasibility of it's use for metal phytoextraction. Also, chosen to study the content of roots, stems, leaves, seeds and oils of heavy metals Mn, Cu, Zn, Ni, Cd and Pb as affected by water treatments Lyzimeters (100 x 70 x 90 cm) were field with clayey soil and irrigated with three water treatments since 1987 twenty years ago. They were W1, Nile water (good water quality) and W3, drainage water (relatively poor water quality) and W2, mixed water 50% W1 + 50% W3. Complete randomized block design with four replicates was used for statistical analysis. The obtained results showed that:  Using poor water quality for irrigation increased ECe, SAR, soluble cations and anions in soil paste extract and total DTPA extractable heavy metals in soils (Mn, Zn, Cu, Ni, Cd and Pb) than that of mixed or good water quality.  No significant effect of water treatment was found on plumule length swelling coefficient, hydration coefficient, crude fat, ash, relative density percent of canola seeds.  The best main radical length and crude protein were obtained in seeds of canola plants irrigated with drainage water.  Content of the studied heavy metals were in the following order: roots > stems > leaves > seeds > oils and greater when poor water quality (W3) was used for irrigation water.  Highly significant differences were found between means of heavy metal content in canola plant due to irrigation water treatment.  Canola oils which extracted from seeds were the least content of studied heavy metals in canola plant organs.  Canola behaved as an accumulator for heavy metals such as Zn, Mn, Cd, Ni and Pb and is useful for metal phytoextraction due to higher metal accumulation capacity.

The scarcity of water makes it difficult and expensive to expand the cultivated land, or even protect soil with natural cover. In Egypt, there is a growing concern that the very limited water resources are becoming increasingly polluted because of the misuse and improper management of resources, which jeopardizes any attempt for sustainable agriculture development. The overall objective of this research was to assess the ground water resources quality for an agroecological system in Behaira governorate. To achieve this objective, water samples of 59 well at depth's 15 to 40 m were taken and chemical as well as heavy metal analyses revealed that:  pH values varied from slightly alkaline to alkaline.  Sodium cation was the dominant followed by magnesium and calcium. On the other hand, chloride and sulphate were the dominant anions.  Adj. SAR of ground water samples studied showed that 30 samples suitable for irrigation purposes, whereas 10 samples may cause permeability problem of soil, and 19 samples were unsuitable for irrigation purposes.  According to USDA diagram, the majority of the studied water samples were in class C3S1 (slightly dangerous for irrigation purposes. The rest of ground water samples were in class C4S3 and C3S2 (highly and medium sodium content and very high saline with high sodium content), so such water are not suitable for irrigation for soils under ordinary condition.  Heavy metal content in the studied ground water samples can be arranged according to their contents in the order: Cu>Pb>Fe>Mn>Cd>Ni. Also, the concentration of Fe, Mn, Pb were lower than the permissible limits for irrigation water according to FAO, 1985. Ni and Cu concentration generally were within the permissible limits FAO, 1985. But Cd concentration was much higher than the permissible limits of FAO, 1985.

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