Authors
Kazuhito Kita
North Research Station, Forestry Research Institute, HRO, Nakagawa,, Hokkaido, Japan
Hirokazu Kon
Forestry Research Institute, HRO, Bibai,, Hokkaido, Japan
Wataru Ishizuka
Forestry Research Institute, HRO, Bibai,, Hokkaido, Japan
Evgenios Agathokleous
Hokkaido Research Center, Forestry and Forest Products Research Institute, 7 Hitsujigaoka, Sapporo,, Hokkaido, Japan
Research Faculty of Agriculture, Hokkaido University, Kita 9 Nishi, Sapporo,, Hokkaido, Japan
Makoto Kuromaru
Forestry Research Institute, HRO, Bibai,, Hokkaido, Japan