Characterization and categorization of Azotobacter and related microorganisms of Bangladesh soils

Abstract

Free.living nitrogen fixing bacterial isolates were purified from eleven soil samples representing eight typical zones of Bangladesh. The isolates were categorized on the basis of their colonial, morphological and physic-biochemical characteristics. Only one isolate could not be fitted into any recognized group. The rest were the members of Azotobacter and Azomona.i genera.