1. CIRAD, G-Eau Research Unit, Montpellier University, Montpellier, France and Asian Institute of Technology, Khlong Nueng, Thailand
2. Sustainable Agriculture Foundation, Nonthaburi Province, Sai Ma, Thailand
3. Montpellier SupAgro, Montpellier, France
4. Social Research Institute, Chulalongkorn University, Bangkok, Thailand