Crop production - Soil quality and fertility - Nutrient management
English
fertilizers , soil fertility , nutrient management , phosphorus , Nitrogen , potassium
Switzerland
FiBL - Research Institute of organic agriculture
https://www.fibl.org
info.suisse@fibl.org
University of Hohenheim
https://www.uni-hohenheim.de/
KU - University of Copenhagen
https://www.ku.dk