Mean soil carbon concentration 0-5 cm (% C) at experimental sites. Error bars indicate standard error of the mean (X error = control values, Y error = treated values). (a) Lightly thinned, heavily thinned, and unthinned control plots. (b) Clearcut and uncut control plots; year of cut is listed by each point.
Hoover Carbon Balance and Management 2011 6:17 doi:10.1186/1750-0680-6-17