Enhanced Nodulation and Nitrogen Fixation in Common Bean (Phaseolus vulgaris L.) Via Conjugation and Azide Resistant Mutants in Rhizobial Strains

K. A. Zaied, Z. A. Kosba, M. A. Nassef and A. A. Zehry

Pakistan Journal of Biological Sciences 8 ( 12 ): 1720 - 1738 , 2005