Studies on some biotic and environmental factors affecting the activity of

Faba bean is one of the most important legumes in Egypt and it considered as the common diet for most Egyptian people because it contains essential protein. Moreover, faba bean plants are rely on biological nitrogen fixation for get its nitrogen requiremeBiological nitrogen fixation by legumes is the results of a symbiotic relationship between the host plants and rhizobia. Rhizobia elicit the formation of specialized organs called nodules on their host. Symbiotic nitrogen-fixation by Rhizobium sp is contrIn addition to that, fungicide-resistant strains were isolated and the effect of phages on the competition between both strains was studied. Indigenous Rhizobium in soil, which specific for faba bean may be less efficient than applied strains as inoculant