What is the role of bacteria in the nitrogen cycle?

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Solution

The role of bacteria:
Biological nitrogen fixation (eg. Azotobacter, Rhizobium).
Decomposition, ammonification and nitrification (eg. Bacillus ramosus, Nitrosomonas, Nitrobacter).
Denitrification, eg. Pseudomonas.
Explanation: Nitrogen-fixing bacteria convert atmospheric nitrogen to ammonia, which can be absorbed by plants. This process is called biological nitrogen fixation. Rhizobium, Azotobacter, and cyanobacteria are a few examples of nitrogen-fixing bacteria that can be either free-living or symbiotic.

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