# A study of the influence of animal manure and clover on the structural and chemical characteristics and the earthworm activity in a Manawatu soil

> 1949 master's thesis by Bramwell Roger Watkin at Massey University

**Wikidata**: [Q112835025](https://www.wikidata.org/wiki/Q112835025)  
**Source**: https://4ort.xyz/entity/a-study-of-the-influence-of-animal-manure-and-clover-on-the-structural-and-chemical-characteristics-and-the-earthworm-activity-in-a-manawatu-soil


## References

1. [Source](http://hdl.handle.net/10179/6925)