The Resistance Force of Hung-up Trees Being Passed through the Crowns of Remaining Trees during Thinning of a Chamaecyparis obtusa Stand.

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  • ヒノキ間伐林分において発生したかかり木が残存立木間を通過する際の接触抵抗力
  • ヒノキ カンバツリン ブン ニ オイテ ハッセイ シタ カカリギ ガ ザンソン リュウボク カン オ ツウカ スル サイ ノ セッショク テイコウリョク

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The resistance force was measured as hung-up trees were passed through the crowns of remaining trees in a Chamaecyparis obtusa stand. The average resistance force was 1.0 kN. A large force was needed to remove manually a tree hung up between two standing trees in an overcrowded thinning stand. The size of a hung-up tree did not have an effect on the resistance force, while leaning angle at which the tree was hung-up influenced the resistance force strongly. The distance between the remaining trees affected the resistance force, which increased exponentially as the distance between the remaining trees decreased.

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