Question

define nitrogen fixation? name some bacteria involved in it

Answer 1

Nitrogen fixation is a process by which nitrogen in the Earth's atmosphere is converted into ammonia or other molecules available to living organisms.

Two kinds of nitrogen-fixing bacteria are recognized. The first kind, the free-living (nonsymbiotic) bacteria, includes the cyanobacteria (or blue-green algae) Anabaena and Nostoc and genera such as Azotobacter, Beijerinckia, and Clostridium.

Answer 2

the process of converting nitrogen into the compounds (nitrates and nitrites) that plants uses for their needs. Rizobium n some algae helps in nitrogen fixation