D. G. Euler(The Uplands Program, University of Hohenheim, Germany and Chiang Mai University, Thailand, Hohenheim Office, Faculty of Agriculture, Chiang Mai University)
K. Martin(The Uplands Program, University of Hohenheim, Germany and Chiang Mai University, Thailand, Hohenheim Office, Faculty of Agriculture, Chiang Mai University)
J. Sauerborn(The Uplands Program, University of Hohenheim, Germany and Chiang Mai University, Thailand, Hohenheim Office, Faculty of Agriculture, Chiang Mai University)
V. Hengsawad(The Uplands Program, University of Hohenheim, Germany and Chiang Mai University, Thailand, Hohenheim Office, Faculty of Agriculture, Chiang Mai University)
