Question

Ques. What are biological nitrogen fixer? give examples also​

Answer 1

Answer:

Nitrogen fixation is a chemical process by which molecular nitrogen in the air is converted into ammonia or related nitrogenous compounds in soil or aquatic systems. Atmospheric nitrogen is molecular dinitrogen, a relatively nonreactive molecule that is metabolically useless to all but a few microorganisms. Examples of this type of nitrogen-fixing bacteria include species of Azotobacter, Bacillus, Clostridium, and Klebsiella.

Answer 2

There are some bacteria and blue-green algae, which fix the atmospheric nitrogen into soil, thereby increasing the fertility of soil. They are known as biological nitrogen fixers. For example, bacterium Rhizobium, Blue green algae Nostoc etc.