Table 8. Age of sample tree of each of communities

Community*	Plot number	Scientific name	Diameter of breast height (cm)	Height (m)	Age (year)
I	8	Pinus densiflora	40	21	60
	12	Pinus densiflora	27	11	60
	Around of 12	Pinus densiflora	61	18	105
II	11	Quercus mongolica	25 + 37	14	47
		Pinus densiflora	20	11	47
III	5	Quercus serrata	32	17	54
		Pinus densiflora	30	14	78
	16	Quercus serrata	37	19	53
IV	18	Betula schmidtii	20	16	40
V	21	Robinia pseudoacacia	32	14	37
VI	1	Pinus koraiensis	37	22	52

Plant community names are referred from Table 6