The triangular techniques were methods to validate the information derived from Mr. Somsong
Sangtawan such as using documentary studies on managing sustainable pomelo orchards, field visits,
observation, focus group discussion and in-depth interview. The coordination to participate in this study from Mr.
Somsong is the key factor since he holds the implicit information which is important to understand the
sustainability of pomelo orchard management. His commercial family pomelo orchards are located in Samut
Songkhram province where he was born and resides. Two key questions of this research were as follows:
1) What are the empirical evidences of managing sustainable pomelo orchards?2) What are the underlying
factors of its success?