1. SFRI (Soils and Fertilizers Research Institute); Hanoi; Vietnam
2. UMR211-BIOEMCO; IRD (Institute of Research for Development, France), posted at SFRI; Hanoi; Vietnam
3. Land Degradation and Development group; Wageningen University; The Netherlands
4. IWMI (International Water Management Institute), IWMI-SEA; Vientiane; Lao PDR