Table 1. Carbon emission factors of four different oak species reported in Greenhouse Gas Inventory and Research Center in Korea (Greenhouse Gas Inventory and Research Center of Korea, 2016).

Species	Basic wood density (Mg m−3)	Biomass expansion factors	Ratio of root biomass to aboveground biomass
Q. acutissima	0.72	1.45	0.31
Q. mongolica	0.66	1.60	0.39
Q. serrata	0.66	1.55	0.43
Q. variabilis	0.72	1.34	0.32