Wath is nitrogen circle

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Wath is nitrogen circle

Posted by Samaiyra Shah 6 years ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 6 years ago

Nitrogen cycle is all about the movement of nitrogen between various elements on Earth (like air, soil, living organisms etc.) The amount of nitrogen in the atmosphere remains constant.

Atmosphere has approx. 78% nitrogen.
Atmospheric Nitrogen is fixed into the soil
- N₂ fixing microbes convert atm. N₂ into nitrogen compounds like NH₃
Plants utilize nitrogen from soil through their roots
Animals utilize nitrogen, feeding on plants
When Plants & animals die, Nitrogenous wastes are returned to soil
- Decomposers convert some part to nitrogen compounds to be used by plants
- Denitrifying bacteria convert into atm. N₂

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