…For example, in Kobuchizawa, Yamanashi Prefecture, pine trees were planted as windbreak forests in 1697 (Genroku 10), and the village decree states that the entire village would jointly manage them. In Hirosaki Domain, in 1864 (Genji 1), each household in the village was assigned the collection of five go of pine seeds, indicating that the creation of coastal windbreak forests was a major policy of the domain. The windbreak effect of a forest is said to extend up to a distance six times the tree height on the windward side and 35 times the tree height on the leeward side. … *Some of the terminology that refers to "coastal windbreaks" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…例えば,山梨県小淵沢では1697年(元禄10)にマツを風除林として植えつけ,村中共同して管理することが村定(むらさだめ)に示されている。弘前藩では1864年(元治1)に,村々1軒ごとにマツの種子5合ずつの採取を割り付けており,海岸防風林造成を藩の主要な政策としていたことを示している。森林による防風の効果は,森林の風上側は樹高の6倍,風下側は樹高の35倍の距離にまで及ぶとされている。… ※「海岸防風林」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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