Nitrification
Nitrification is the conversion of ammonium ions (NH4+) into nitrate ions (NO3−) by nitrifying bacteria. It happens in two steps, each carried out by a different group of bacteria:
NH4+ → NO2− → NO3−
1. Ammonium ions are oxidised to nitrite ions (NO2−), for example by Nitrosomonas.
2. Nitrite ions are oxidised to nitrate ions, for example by Nitrobacter.
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More in Nutrient Cycles
- Role of Saprobionts
- The Nitrogen Cycle
- Nitrogen Fixation
- Ammonification
- Denitrification
- The Phosphorus Cycle
- Mycorrhizae
- Natural and Artificial Fertilisers
All 13 lessons in Nutrient Cycles · All AQA A-level Biology topics