Question

5. Explain nitrogen cycle with the help of diagram?​

Answer 1

Answer:

• The series of by which nitrogen and it compounded are inter covered in the environment and the living organisms including nitrogen fixation and decomposition.

Answer 2

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Explanation:

Nitrogen Fixation: Atmospheric nitrogen is converted by lightning or certain bacteria

like Rhizobium, Azotobacter and blue-green algae (present in soil) into compounds usable by plants.

Nitrification: Ammonia conversion into nitrites by Nitrosomonas and further conversion of nitrites into nitrates

by Nitrobacter. Plants take up nitrogen in form of ammonia or nitrates.

Assimilation: Roots of plants absorb these nitrogenous compounds from soils and plants use them to synthesize

proteins and other compounds.

Animals feeding on plants get these proteins and nitrogen compounds.

Ammonification: When plants and animals die, bacteria and fungi present in the soil convert the nitrogenous wastes

into compounds that can be used by plants again.

Denitrification:Nitrates can be converted into nitrogen gas which is released back in the atmosphere by certain

bacteria. Eg. Pseudomonas

Hence, atmospheric nitrogen remains constant.