The diagram below shows nitrogen cycle

The chart illustrates

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nitrogen

Correct article usage

the nitrogen

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cycle

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on the Earth.

It is clear that

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there is a wide range of stages.

In addition

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, it can be seen that

nitrogen

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circulates through the

air

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in a

cycle

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,

plants

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and animals, and the

soil

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, and back into the

air

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. The natural

cycle

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of

nitrogen

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begins through the

air

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.

Next,

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the action of lightning and free-living

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nitrogen fixing

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nitrogen-fixing

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bacteria

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carries

nitrogen

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into the

soil

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. At the same time,

nitrogen

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-fixing

bacteria

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nodules of leguminous

plants

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take the

nitrogen

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directly from the

air

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.

Following

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this

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, the

nitrogen

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in the

soil

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is taken up by non-leguminous green

plants

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. Meanwhile, leguminous

plants

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derive

nitrogen

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straight from the

bacteria

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in nodules. Looking at the following stage of the

cycle

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, it is noticeable that all types of

plants

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are consumed by animals. The animals digest the

plants

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and produce waste

such

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as dead

plants

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and animal excreta, the waste goes back into the

nitrogen

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soil

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. After

that

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that,

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the waste in the

soil

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is transformed into denitrifying

bacteria

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.

Finally

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, the

nitrogen

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is returned to the

air

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, and the

cycle

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continues anew.