- Norwegian University of Life Sciences (UMB)
- North Carolina State University, USA
- Georg August University of Gettingen, Germany
- World Agroforestry Centre (ICRAF)
- University of Wageningen, The Netherlands
- International Institute of Tropical Agriculture (IITA), Cameroon
- Institut de Recherche Agricole pour le Developpement (IRAD)
- Centre de cooperation internationale en recherche agronomique pour le developpement (CIRAD)
- Bogor Agricultural Institute (IPB)
- Forestry Research and Development Agency (FORDA)
- Indonesian Soils Research Institute (RSRI)
