Ecology
Dictionary Definition -
the study of the relationships between living organisms and their environment

Nitrogen Cycles through Ecosystems

Nitrogen cycles through ecosystems

• Nitrogen is required for all life.
• Almost 78% of the air is nitrogen, but organisms cannot use nitrogen in gaseous form.
• In the nitrogen cycle, bacteria in soil and roots fix nitrogen by changing it from a gas to nitrate compounds that can be taken up by plants.
  

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