Nitrogen Cycle

Nitrogen Cycle

1. Nitrogen Fixation

   • Ammonia (NH3)
     • Ammonium (NH4+)
     • Plants
       • Animals
         • Plants > Animals via Ingestion
         • • Animal > NH4+ by putrification
       • NH3 > Plants via absorption from roots
       • • Plants > NH4+ by De-amnifiaction
       • NO3- > Plants via absorption from root
     • NH3 > NH4+ By dissolving
     • Nitrites (NO2-)
       • Nitrates (NO3-)
         • NO2- > NO3- by Nitrification using Nitrosomonas
         • NO3- > N2 via de-nitrification
       • NH3 > NO2- by Nitrification using Nitrosomes
   • By Azotobacter and Rhizobium

2. N2 in the air