Nitrification - nutrient cycles, Biology

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Nitrification - Nutrient Cycles

Ammonia or ammonium salts, are converted into nitrate in a process termed nitrification to be useful to most autotrophic and heterotrophic organisms. This process occurs in warm moist soil with near neutral pH and takes place in two steps:

  • Ammonia salt or ammonia is oxidised and converted into nitrite by Nitrosomonas

2NH3 + 3O2 →  2NO-2 + 2H+ + 2H2O  65 kcal/mole

  • Nitrite is further oxidised and converted into nitrate by Nitrobacter

2NO-2 → 2NO-3   17Kcal/mole

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