Question

What is nitrogen cycle? Explain different processes of nitrogen cycle.

Answer 1

hi my frd
Nitrogen cycle :
The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among the atmosphere, terrestrial, and marine ecosystems.
The different process of nitrogen cycle are:
Important processes in the nitrogen cycle include fixation, ammonification, nitrification, and denitrification.


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Answer 2

Hello friend..

Ans- Nitrogen is an essential constitutent of all living beings as a part of proteins, chlorophyll, nucleic acids and vitamins.

The cycle of processes in which nitrogen in the atmosphere is passed into the soil and lifeforms and then released back into the atmosphere is called nitrogen cycle.

Atmospheric nitrogen is converted into nitrogeneous compounds ammonium with the help of nitrogen fixing bacteria in the root nodules of leguminous plants (such as peas and beans), blue green algae and during lightning.

Ammonium gets changed into nitrates (NO3) by the action of bacteria. This process is called nitrification. These nitrates can directly be taken by the plants and synthesised as plant protein.

These proteins are passed to animal through the food chain, i.e. from plants to herbivores and from herbivores to carnivores. This process is called assimilation.

When plants and animals die, bacteria and fungi present in the soil convert the nitrogenous wastes into nitrogenous compounds which are used by plants again. This process is called ammonification.

Certain bacteria called denitrifying bacteria convert some part of them to nitrogen gas which goes back into atmosphere. This is called denitrification.

As a result, the percentage of nitrogen in the atmosphere remains more or less constant.

This is a Nitrogen cycle.


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