Abstract
One of the fundamental problems of farmland policy in Japan today is to adjust the unstable factors of long-term food supply and demand, while the structural excess of rice crop products is held short-terminable. As a solution for such problems, the authors have proposed the extensive management as a method for the agricultural land resource maintenance. In this paper, from the restoration cost of the abandoned paddy fields' point of view, we gave an estimate of the possibility of utilization of agricultural land resource economically, so we attempted to make a model of relationship between elapsed years after abandonment and restoration cost of abandoned field lot according to the case.
We surveyed in Ohshima where is one of the most snowy district in Japan. As the result, we cleared that continual maintenance by little operation year by year at an early stage of abandonment is more effective from the economical point of view, and advanced proposals on conservation measures of farm land resource.
