Table 9. Inorganic compounds content of wood chips from logging residues by harvesting and processing methods.
(unit : mg/kg dry)

Items	Harvesting and processing methods
	CTL								WT
	Unscreened				Screened				Unscreened				Screened
	Avg.	Min.	Max.	S.D.a	Avg.	Min.	Max.	S.D.a	Avg.	Min.	Max.	S.D.a	Avg.	Min.	Max.	S.D.a
As	n.d.a				n.d.a				n.d.a				n.d.a
Cd	0.141	0.139	0.146	0.004	0.135	0.130	0.138	0.005	0.178	0.165	0.185	0.011	0.175	0.164	0.187	0.012
Cr	5.405*	5.007	5.719	0.363	2.069*	1.989	2.188	0.105	2.052	1.575	2.970	0.796	1.470	1.194	1.896	0.374
Pb	1.540	1.349	1.659	0.167	1.058	0.908	1.183	0.139	0.978	0.857	1.066	0.109	0.677	0.567	0.757	0.098
Hg	n.d.a				n.d.a				n.d.a				n.d.a

t-test P<0.05,
Standard deviation,
n.d. : not detectable