福井地震の水稻収量に及ぼした影響に就いて

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The summary of the influences on the yield of paddy rice caused by the earthquake is as follwos. 1. Considerating the damage to the cultivated fields, and the irrigation and drainage arrangement, the paddy-fields are classified into Kyoshitzuden, Taisiden, Kanbatzuden. In the zone of Shitzden, the falling of the ground brought on the badly-drained fields. and the more powerful its degree was, the worse was the rice yield. In the zone of dry-rice-fields and the end parts of irrigated, there were found a lot of cracks and waved fields. Except a few areas damaged too much, they were almost restored to the normal condition. 2. In the early-rice zone based on one-crop farming in Shitzuden, the degrees of the crop reduction were less than of the middle and late rice zone based on two-crop farming in the dry-rice-fields. This was closely connected with the relation between the time of the rice transplantation and of the outbreak of the Fukui earthquake. In the zones met with the earthquake in 3 or 5 days after the rice transplantation, the crop reduction was extraordinary. Compared with the former, in the zones where the rice transplantatinon was done after the earthquake, the damages to the crop were much greater. 3. With the regards to the damages arising from the difference of the time of repeness, the early rice ws badly damaged, for the overflood occurred before or after heading. And in the zones suffered from drought, the middle and late rices were badly damaged. 4. As the complementary and introduced seedings were used and the adjusting and managing the rice crop was imperfect, many paddy-fields turned into seeds-mixed fields. This was found much in the late rice zones. 5. The rice's sterility was brought about by the gush of cold water, the submergence, the water-stagnation and drought, of rice fields. 6. The increase of disease, blights and weeds was recognized in every zone.
1952-12-20

福井地震の水稻収量に及ぼした影響に就いて

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