Question

xplain any 3 processes of Nitrogen cycle in which bacteria plays an important role.

Answer 1

Answer:

In a nutshell, bacteria aids in the nitrogen process through nitrogen fixation, assimilation, nitrification, and finally denitrification.

In the nitrogen fixation process, nitrogen fixing bacteria converts the

N

2

in the atmosphere into

N

H

3

(ammonia). This bacteria binds hydrogen molecules with the gaseous nitrogen to form ammonia in the soil.

During assimilation, or when plants take up nitrates from the soil, bacteria aid in the process with the plants in making ammonia. Animal wastes is also a major place where bacteria thrives and produces ammonia. The process in which assimilation occurs in plants, and then bacteria converts the nitrates to ammonia is called ammonification.

From the conversion of ammonia to nitrites, bacteria also aids in this process called nitrification. The nitrifying bacteria mostly present in soils, oxidize ammonia into nitrites, and from nitrites to nitrates.

Finally, the process of denitrification also has bacteria present to aid in converting nitrates back into a gaseous form of nitrogen in the atmosphere.

Answer 2

Bacteria are used in assimilation, nitrification and denitrification processes of the Nitrogen cycle.

Explanation:

• Bacteria assist plants in assimilation, or the process of taking up nitrates from the soil, by producing ammonia. Bacteria grow and create ammonia in large quantities in animal faeces.

• Nitrification, which is carried out by nitrifying bacteria, converts soil ammonia to nitrates (NO3), which plants can take up and use in their tissues.

• Denitrifying bacteria, which are particularly active in water-logged anaerobic soils, also metabolise nitrates; this procedure is referred to as denitrification.