MAteRIAL ANd MetHOdOLOgy Preliminary Information The off-season longan cultivation process is carried on during (1) May to July for the output during November to February and (2) October to November for the output during May to June. The details regarding off-season longan cultivation can be found in Manochai et al. (2005). Unfortunately, the production of off-season longan is not an easy task due to many factors, both controllable and uncontrollable, such as weather, soil, and the agriculturist’s skill (Ramingwong et al., 2011). Sopadang et al. (2008) addressed forty factors that have an effect on the quantity of supply of off-season longan, as presented in Table 1.