# nitrification

> biological oxidation of ammonia or ammonium to nitrite followed by the oxidation of the nitrite to nitrate

**Wikidata**: [Q668677](https://www.wikidata.org/wiki/Q668677)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Nitrification)  
**Source**: https://4ort.xyz/entity/nitrification


## References

1. Nuovo soggettario
2. Freebase Data Dumps. 2013
3. YSO-Wikidata mapping project
4. BabelNet
5. National Library of Israel Names and Subjects Authority File
6. GF WordNet
7. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)