Question

What are the different types of nitrogen fixation?

Answer 1

Nitrogen fixation:

1. Nitrogen fixation is the process by which atmospheric nitrogen is converted to a form of nitrogen such as ammonia by natural or industrial means.
2. In nature, most nitrogen is harvested by microorganisms from the atmosphere to form ammonia, nitrites, and nitrates that can be used by plants.

Types of nitrogen fixation:

Physical nitrogen fixation:

1. The process of converting nitrogen gas into a useful form for plants and other organisms in a biological process is called physical nitrogen fixation.
2. Ammonia is produced industrially by direct mixing of nitrogen with hydrogen at high temperatures and pressures.
3. Later, it is converted into various types of fertilizers like urea, etc.

Biological nitrogen fixation:

1. The conversion of atmospheric nitrogen into nitrogenous compounds by the agency of living organisms is called biological nitrogen fixation.
2. This process is carried out by two main types of microorganisms: those that live in close symbiosis with other plants and those that are "free-living" or non-living.
3. Biological nitrogen fixation (BNF) is a process in which atmospheric nitrogen is reduced to ammonia in the presence of nitrogenization.
4. Nitrogenesis is a biological catalyst that occurs naturally only in certain microorganisms such as the symbiotic Rhizobium and Frankia, or the free-living Azospirillum and Azotobacter and BGA.