This paper tries to discuss the irrigation and the growth of farming in and around the northern area of Rokuhara Fan in northeastern Japan. It is to be summarized as follows.
1. The alluvion along the Waga River irrigated by the water coming out of the Fan enabled rice planting from very early times, which, however, was restricted greatly by the volume of its water. The improvement of irrigation utilizing the main stream of the Waga River as its source was so often a subject for discussion, which hitherto showed a variety of measures coping with the situation.
2. paddy development of the fields and wasteland that had have remained in the alluvion was reviewed from early times. This scheme was then extended to the whole alluvion area after the World War II. This was due to the big advances of postwar agricultural enterprises and the rises of farmland productivity that offered favorable conditions conductive to the promotion of these enterprises.
3. Development of the east central Fan was achieved independently of others by the hand of the prefectural Iwasaki Farmland Development project, aiming at the constructin of a model farm based on a large farming scale. The cultivation of the Fan center developed a new aided by the postwar farmland development policies.
4. Farmland Development of the Fan and its outskirts came to its highest after the World War II. The farming in the affair advanced along with the betterment of irrigation and drainage canals that followed the construction of the Yuda Dam. The farmland improvement projects seen in all the areas of the farmers, still doubtful of these projects, were not openly opposed to them, simply because they were at least sure about the rise of production and betterment of the living standard these projects were going to promise.
5. It seems that the whole projects certainly helped create rice-centered farming. However the government policy of the reduced ricefields did not actually take such a course, but only caused every sort regional divergence of farming due to the difference of agricultural conditions in and around the Fan.
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