Locational and Ecological Analysis Regarding the Ill-Drained Paddy Farming System That Had Been Practiced until the Prewar Period in the Northern Part of Boso

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  • 戦前まで房総半島北部でおこなわれた湿田農法に関する立地生態的分析
  • 栽培 戦前まで房総半島北部でおこなわれた湿田農法に関する立地生態的分析
  • サイバイ センゼン マデ ボウソウ ハントウ ホクブ デ オコナワレタ シツデン ノウホウ ニ カンスル リッチ セイタイテキ ブンセキ

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I discussed the ill-drained paddy farming system that was used from the modern age until the prewar Showa era in the northern part of Boso Peninsula. In ill-drained paddy field in Shimousa district during the Edo era, the Indica-type rice called Tomomi was broadly cultivated by "Tsumita" (direct sowing in a flooded paddy). Tomomi was cultivated in a heavy ill-drained paddy field of muck soil/peat soil called "Taito-tsuchi". When Japonica-type rice was cultivated by transplanting in "Taito-tsuchi" paddy, its growth was significantly restrained to result in heavy "natsuochi/akiochi". Direct sowing in a flooded paddy is a cultivation method utilizing the oxidative surface soil layer. The cultivation method was related to the plant type of Tomomi. In paddy field where "natsuochi/akiochi" was moderate, dense planting of small seedlings was performed until the pre-war Showa era. Dense planting of small seedlings was a cultivation method to secure the number of ears in ill-drained paddy fields where drainage and growth control were difficult. The ill-drained paddy farming system remained until the prewar period in the Shimousa district where land improvement had been delayed.

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