Fig. 2. Variation of soil bulk density among reclaimed and control plots. The SE was 0.07 among three reclamation treatments and 0.19 among all plots in the 0- to 10-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.