Swidden agriculture in Okawachi, Shiiba Village.

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  • 宮崎県椎葉村大河内地区における焼畑農業
  • ミヤザキケン シイバソン オオコウチ チク ニ オケル ヤキバタ ノウギョウ

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Abstract

Swidden agriculture was the major cultivation style in Shiiba Village, and it had been carried out until 1970s in Okawachi settlement. In Okawachi, the forest was burned on spring or summer for cultivation. In the spring burn field, which was settled in old forest and dominant type in Okawachi, Japanese millet (Echinochloa esculenta) was produced in the first year, and foxtail millet (Setaria italica) and azuki bean (Vigna angularis var. angularis) were produced in the second and third years. In the summer burn field, which was settled in young forest, buckwheat (Fagopyrum esculentum) was the first year product, and Japanese millet and foxtail millet ware the second year products, and azuki bean and soybean(Glycine max subsp. max) were the third year products. The slush and burn cycle was 15 to 20 years in the spring burn field whereas the summer burn field had seven to eight years cycle during Meiji (1868-1912), Taisho (1912-1926) and early Showa (1926-1989) period. The burnt field have been replaced to tree plantation of Sugi (Cryptomeria japonica) since 1940s.

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