The Nitrogen Cycle

It starts with a bolt of lightnin’

And it’s a cycle that involves nitrogen

And then it resumes

In the roots of legumes

Bacteria fix N2 in the soil

And fungi that live on food spoiled

Then out comes new NH4

That’s ammonium if you keep score.

In come two types of bugs

So cool we should give them all hugs

First they make compounds called nitrites

Every day and all the nights

Then they make things called nitrates

In every one of the fifty states.

Then what do they do?

Why they go and make N2

That’s the last thing I must explain

Then the cycle begins again.