添畑沢スギ間伐試験地。1905年植栽。平均樹高40m
Plantation of Cryptomeria japonica in Akita prefecture, which
was planted in 1905. Average height of trees exceeds 40m.




スギ高齢林（茨城県御前山）。1850年植栽。平均樹高40m
Plantation of Cryptomeria japonica in Ibaraki prefecture, which
was planted in 1905. Average height of trees exceeds 40m.




ヒノキ林の列状間伐（茨城県笠間）。1970年植栽
Plantation of Chamaecyparis obtusa in Ibaraki prefecture, just
after a thinning operation. This stand was planted in 1970.