# nitrogen cycle

> biogeochemical cycle by which nitrogen is converted into various chemical forms

**Wikidata**: [Q82551](https://www.wikidata.org/wiki/Q82551)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Nitrogen_cycle)  
**Source**: https://4ort.xyz/entity/nitrogen-cycle


## References

1. [Nuovo soggettario](https://thes.bncf.firenze.sbn.it/termine.php?id=51997)
2. Nuovo soggettario
3. [自然氮循环 - 《中国大百科全书》第三版网络版](https://www.zgbk.com/ecph/words?SiteID=1&ID=180556)
4. Freebase Data Dumps. 2013
5. Integrated Authority File
6. BabelNet
7. Quora
8. National Library of Israel
9. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)