Institution: | Japan International Research Center for Agricultural Sciences, 1-1 Owashi, Tsukuba, Ibaraki 305-8686, Japan,;Hokkaido Research Center, Forestry and Forest Products Research Institute, Sapporo 062-8516, Japan, and;Department of Geography, Ritsumeikan University, 56-1, Tojiin-kita-machi, Kita-ku, Kyoto 603-8577, Japan |