Abstract
Each country is dependent on mutual farmland through agriculturalproducts trade. Although it is significant quantifying the degree of dependence to know the sustainability of life, it is also important to discuss the state of the dependency, and for that, it is necessary to take the agricultural productivity into consideration. In this paper, the agricultural productivity is analyzed by using DEA, and the status of agricultural products trade on the viewpoint of productivity is evaluated. Moreover, the relationships between weather conditions, or farmland price and productivity are investigated, and the cause of inefficiency is considered.
