and ensuring the nation's food security. The government has undertaken considerable investments in irrigation and water … maintains the hydraulic infrastructure, but farmers have to contribute to funding and managing the irrigation systems. In this …

fee decided by water supplier side. However, diverse functions are being desired to irrigation facilities in recent years … environment as typical examples. Thus agricultural water supply should be regarded as irrigation services and it is needed to … irrigation services, on it, grasp the agricultural conditions quantitatively from an economic viewpoint by such as estimation of …