Summary of the 9th International Phosphorus Workshop (IPW9)
 ETH Zurich, 8 – 12 July 2019:
- Site visits
 - Holistic view
 - Phosphorus excess or phosphorus insufficiency?
 - Fertiliser innovation
 - Animal feeds
 - Long-term field trials
 - Phosphorus management policies
 - Phosphorus recycling
 - Conclusions
 
