الفهرس 
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Abstract
The main objectives of this recent study were studying the effects of drainage water reuse, nitrogen fertilizer and biofertilizers on forage yield and plant characters of alfalfa in newly reclaimed soils (silty loam soil condition) in north Egypt. The main results might be summarized in the following: 1.Green forage yield: 1.1; Total seasonal green forage yield: 1.1.1:In the first season, total seasonal green forage yield significantly (p≥ 0.01) varied with varying water quality class. Also, nitrogen levels had significant (p≥ 0.01) affects. Meanwhile, neither nitrogen x bio-fertilizers nor any of the first or the second order interactions among the studied factors, had reached the level of significance. 1.1.2: In the second season of the study, both of water quality classes and nitrogen fertilizer levels, maintained significance (p≥ 0.01) effects. Meanwhile, bio-fertilizers showed significant (p≥ 0.05) variations. Also, the second order interaction among water quality class (W) x nitrogen level (N) x bio-fertilizer (B) ,showed significant (p≥ 0.01) variations. This might reflect variable effect of bio-fertilizers with varying nitrogen level and water quality class. 1.1.3:In the third season of the study, significant variations in total seasonal green forage yield expressed by each of; water quality class (p≥ 0.01) , the first order interactions between each of water quality class (w) x bio-fertilizer (B) (p≥ 0.01) and nitrogen level (N) x bio-fertilizer ( B) (p≥ 0.05) and the second order interaction among water class (w) x nitrogen level (N) x bio-fertilizer (B) (p≥ 0.05).1.1.4 :Over the studied nitrogen levels, a significant yield reduction of 9.65, 14.62 and 8.29 ton. Faddan.-1 was associated with drainage water irrigation, in the three successive years, respectively. These figures amount to 13.92, 26.07 and 23.0% of that obtained yield with fresh canal watering.