Fig. 4. Variation of soil organic C among reclaimed and control plots. The SE was 1.3 among three reclamation treatments and 5.1 among all plots in the 0- to 10-cm depth, whereas it was 1.6 among three reclamation treatments and 5.1 among all plots in the 10- to 20-cm depth. The bar indicates mean separation using Bonferroni multiple comparison. BTS, borrowed topsoil; FGD, flue gas desulfurization by-products; FGDC, flue gas desulfurization by-products + yard waste compost; SP, unreclaimed spoil; UMS, unmined soil.