Lysimeter experiments were carried out at Sakha Agric. Res. Station in winter season of 1999/2000 for sugar beet and Canola to study the effect of irrigation by different water qualities in four types of soils on yield of both crops, water relations, soil salinity and the elemental contents of soil and plant. The experiment was conducted in a spilt plot design in four replications. Soil types; clayey, loamy, sandy and calcareous were the main plots. The sub plot treatments included different water qualities; fresh water, sewage water, agricultural drainage water and blended sewage with drainage water at ratios of 1: 1 and 2: 1. The obtained data revealed that the EC_w and SAR of low quality water were 3 times of that of fresh water. Also, irrigation with blended sewage water with drainage water at ratio of 2: 1 produced the highest sugar beet root yield. Moreover, the irrigation with drainage water produced the highest root weight per plant and sucrose percentage.                 The highest seed yield of Canola was obtained with irrigation with sewage water under both of clay and loamy soil. While the lowest seed yield was recorded with drainage water under both of sandy and calcareous soils.                 Concerning water consumptive use, data indicated that the irrigation with fresh water under clayey soil recorded the highest value of water consumptive use for both crops, while the lowest value was obtained by using of blended sewage water with drainage water at ratio of 2: 1.                 Irrigating of sugar beet with blended sewage water and drainage water under clayey soil achieved the highest value of crop water use efficiency. Whereas, irrigation with sewage water recorded the highest value of crop water use efficiency for Canola.                 Regarding the changes occurred in soil constituents, data clearly showed a relative decrease in ECe, Ca²⁺ and Mg²⁺, while the reverse trend is true for Na⁺. These changes are more pronounced in soil irrigated with sewage and drainage water.              Special optimization for increasing the available contents of micro-nutrients (Fe, Mn, Zn and Cu) and non-nutritive heavy metals (Cd, Ni, Pb and Co) in soils irrigated with low quality waters.                 Data obtained from the elemental composition of plants revealed that the relative high content of heavy metals in the sewage effluent supports the active uptake of non nutritive metals in the plant tissues grown in the soils irrigated with the studied low quality waters.