Bio-fertilizers are the formulation of living microorganisms
which are able to fix atmospheric nitrogen in the available form to
plants either by living freely in the soil or being associated symbiotically
with plants. They are capable of mobilizing nutritive elements
from non-usable form to usable form through biological
process.1 The primary object of this study is on Azotobacter, a
member of the family Azotobacteriaceae and it has been isolated
from both soil and rhizosphere environment. Azotobacter spp. are
mesophilic bacteria whose growth and nitrogen fixing ability are
highly dependent on the temperature. The application of free-living