Nitrogen and Carbon cycle

• Function of the nitrogen cycle?

  Converts nitrogen into forms that living things can use.

  • Formation of protein, DNA and RNA
• Bacteria involved in the nitrogen cycle

  1. Nitrogen fixing bacteria
  2. Bacteria of decay
  3. Nitrifying bacteria
  4. Denitrifying bacteria
• Nitrogen fixing bacteria


  Converts nitrogen gas into nitrates
• Bacteria of decay


  Break down dead organisms and release nitrogen gas in the form of ammonia into the soil.
• Nitrifying bacteria


  Ammonia is converted into nitrites and nitrates
• Denitrifying bacteria


  Nitrates are converted back into nitrogen gas