# Helmut J. Janssen

> author of 1995 masters thesis at University of Otago titled The Trees? Influence on Soil Development. Nutrient Cycling Strategies of Trees. Fundamental Knowledge for synecological Forest Ecosystem Management.

**Wikidata**: [Q117360921](https://www.wikidata.org/wiki/Q117360921)  
**Source**: https://4ort.xyz/entity/helmut-j-janssen


## References

1. [Source](http://hdl.handle.net/10523/9901)
2. [Source](https://www.linkedin.com/in/helmut-janssen-572b8b24/?originalSubdomain=nz)