Affiliation: | (1) Laboratory of Silviculture, Faculty of Agriculture, Kyushu University, 812-8581 Fukuoka, Japan;(2) Forest Science Division, Faculty of Agriculture, Miyazaki University, 889-2192 Miyazaki, Japan;(3) Present address: Department of Civil Engineering, Faculty of Engineering, Kyushu Institute of Technology, 804-8550 Kitakyushu, Japan |