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スギの長伐期施業 · 2020. 7. 17. · 1 1.長伐期施業とは -全国の事例 長伐期とは、一般に通常の伐期の2倍以上の期間を示し、末口 径が30cm以上の大径材を収穫目標とする林業を、長伐期施業と言
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