About HARA HIDEHO
About 北海道総合研究機構 林試
About TERAZAWA KAZUHIKO
About TOKUDA SAWAKO
About 北海道総合研究機構 林試
About ONODERA KENSUKE
About 北海道総合研究機構 林試
About TAKIYA MIKA
About 北海道総合研究機構 林試
About 北海道林業試験場研究報告
About Quercus mongolica var.Crispula
About artificial forest
About forest damage
About scale insect
About leaf
About plant death
About felling
About plant growth
About ratio
About imago
About time course
About tree(plant)
About tree crown
About breast-height diameter
About branch
About population occurrence
About forest investigation
About Hokkaido
About trunk(tree)
About increase(phenomenon)
About Asterodiaspis japonica
About ナラフサカイガラムシ
About 激害木
About population
About dead wood by withering
About 枯死木率
About 枝枯
About 雌成虫殻
About 深川市
About 増加量
About 伐倒処理
About 伐倒本数率
About 不定枝
About Forest tending
About Plant damage caused by insects,mites
About ミズナラ
About 被害