Abstract
It is necessary to develop a model to describe causal relation regarding the progressive rate of cultivation abandonment which raises the collapse of agrarian community and additionally unstable watershed economic growth and environmental sustainability. This study proposes a cultivation abandonment model for paddy field with the GIS, which is one of the nested logit models. Utilizing proposed model, we investigate the subsidy plan for sustainable farming to resolve an issue of current subsidy system clarified from the long term analysis. Finally, the applicability of the proposed cultivation abandonment model to environmental system modelling is described, taking a previous study regarding the sustainable farming and watershed environmental economic problems as an example.
