Table 1. General characteristics of the sampled Acer palmatum

Tree age (yr)	DBH (cm)	Height (m)	Crown width (m)	Clear bole length (m)
17±0.9/13~26*	11.7±0.8/6.1~18.6	4.9±0.2/2.7~7.4	3.3±0.3/1.8~6.5	1.2±0.1/0.6~1.8

mean±standard error/minimum~maximum