Fig. 1. Total soil carbon contents in plots amended at the high rates in 1998 and 1999. Paper mill residuals (PMR) was applied at 44.8 Mg ha^-1 and paper mill residuals composted with bark (PMRB), paper mill residuals composted without a bulking agent (PMRC), and peat were applied at 78.4 Mg ha^-1. Error bars, representing ± one standard deviation are included.