Question

What is nitrogen cycle​

Answer 1

Answer:

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Explanation:

the series of processes by which nitrogen and its compounds are interconverted in the environment and in living organisms, including nitrogen fixation and decomposition

Answer 2

Hey mate!!

Hey mate!!Here's your answer!

Nitrogen Cycle

Nitrogen is needed for the formation of proteins, amino acids and nucleic acids.

The circulation of nitrogen through living things (plants and animals) and non living environment (air, soil and water) is called nitrogen cycle.

Steps of nitrogen cycle-

There are 5 steps of Nitrogen Cycle.

• Nitrogen Fixaton
• Nitrogen Assimilation
• Ammonification
• Nitrification
• Denitrification

1. Nitrogen Fixaton- Our atmosphere has 78 percent nitrogen gas. Plants and animals cannot take atmospheric nitrogen directly. It has to be first converted into useful nitrogen compounds that can easily be absorbed. The conversion of free atmospheric nitrogen into nitrogenous compounds called nitrogen fixation. Nitrogen fixation occurs by the following two ways-

(a) Lightning - When lightning, strike nitrogen and oxygen in atmosphere react and form oxides of nitrogen. They dissolve in rainwater and form nitric acid. Nitric acid reacts with limestone in the soil and converts into nitrates.

(b) Bilogical Nitrogen Fixation - Certain plants such as peas, beans, pulses (leguminous plants) contain rhizobium bacteria in their root nodules. These bacteria can take atmospheric nitrogen and convert it into nitrogen compounds. Some syanobacteria like nostoc and anabaena also fix atmospheric nitrogen into nitrate.

2. Nitrogen Assimilation- Plants absorb nitrates from the soil dissolved in water with the help of roots and convert them into plants protein. The herbivorous animals eat green plants and convert the plant protein into any other proteins. The herbivorous animals are then eaten by carnivorous animals. The process of conversion of inorganic nitrogen compounds into organic compounds that became a part of living organism is called in Nitrogen assimilation.

3. Ammonification- When plants and animals die, the proteins present in them are converted into ammonium compounds by the putrefying bacteria and fungi (decomposers) present in the soil. This process is called on Ammonification. We can define Ammonification is conversion of complex organic compounds like proteins to ammonia.