The Nitrogen Cycle

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  • Organic Nitrogen in soil
    • Ammonium in soil: NH??
      • Oxidation by bacteria: e.g. Nitrosomonas
        • Nitrate in soil: NO??
          • Oxidation by bacteria: e.g.Nitrobacter
      • Urea: CO(NH?)?
        • Excretion
          • Organic nitrogen in animals
      • Organic nitrogen in soil
        • Death
          • Organic nitrogen in animals
          • Organic nitrogen in plants
            • Feeding
            • Organic nitrogen in leguminous plants
              • Feeding
          • Uptake by plant roots
            • Organic nitrogen in leguminous plants
              • Nitrate in soil: NO??
                • Leaching
                  • Nitrate in ground water and waterways
                • Oxidation by bacteria: e.g.Nitrobacter
                • Nitrogen Oxide
                • Application of fertilisers
                  • Ammonium NH?? and nitrate NO?? in fertilisers
            • Application of fertilisers
              • Ammonium NH?? and nitrate NO?? in fertilisers
          • Free-living bacteria
            • Nitrogen gas in air: N?
              • Rhizobium
                • Denitrification by bacteria
                  • Nitrate in soil: NO??
                    • Leaching
                      • Nitrate in ground water and waterways
                    • Nitrogen Oxide
                • Lightning
                  • Haber Process

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