Linked from
The 22 pages that link to Nitrification, each with the reason it gives.
Nitrogen fixationRelated: It transforms fixed nitrogen into other forms that plants can acquire.
Constructed wetlandRelated: Oxygen-rich zones in some beds enable this step in nitrogen removal.
NitrateRelated: It generates nitrate in oxygen-rich soils and waters.
Nitrogen fertilizerRelated: Soil microbes convert ammonium fertilizer into mobile nitrate.
AmmoniumRelated: It converts ammonium in soils and waters into oxidized nitrogen forms.
Activated sludgeRelated: A sufficiently long sludge age can support these slower-growing organisms.
BioaugmentationRelated: Nitrifying cultures can be added when ammonia conversion is inadequate.
NitrososphaeriaNarrower topic: Nitrososphaeria perform the first step in this two-stage process.