Table 1.
Change of chemical composition of the wood depending on burial period (unit: %)

		Glucan	Xylan	Galactan	Arabinan	Mannan	Lignin	Ash
Korean red pine	PC	41.41^a (0.24)	4.90^a (0.23)	3.98^a (0.28)	1.08^a (0.14)	9.56^a (0.51)	31.15^a (0.35)	0.26^a (0.09)
	P3	41.94^a (0.35)	4.64^a (0.17)	4.05^a (0.31)	1.03^a (0.21)	9.85^a (0.34)	28.61^b (0.01)	2.00^b (0.25)
	P6	41.40^a (0.71)	4.67^a (0.07)	4.02^a (0.38)	1.19^a (0.00)	9.66^a (0.07)	32.20^c (0.57)	1.66^b (0.06)
	p-value	0.471	0.345	0.979	0.535	0.729	0.001	0.000
Sawtoothoak	OC	38.63^a (0.25)	14.26^a (0.08)	3.81^a (0.06)	0.64^a (0.07)	1.50^a (0.01)	27.68^a (0.37)	0.33^a (0.10)
	O3	38.06^a (0.43)	14.18^a (0.39)	3.80^a (0.39)	0.49^a (0.25)	1.35^b (0.00)	26.20^b (0.33)	1.26^b (0.33)
	O6	38.26^a (0.54)	13.99^a (0.28)	3.64^a (0.28)	0.64^a (0.07)	1.47^a (0.07)	25.76^b (0.26)	1.20^b (0.04)
	p-value	0.511	0.642	0.332	0.559	0.029	0.002	0.000

PC: Korean red pine for control, OC: sawtooth oak for control, P3: Korean red pine after 3 months, P6: Korean red pine after 6 months, O3: sawtooth oak after 3 months, O6: sawtooth oak after 3 months.
Same letters on the column are not significantly different from each other at the p< 0.05.