Fig. 4. Utilization of different group of substrate at BIOLOG-ECO by the soil microbial community of tropical peat swamp samples which have undergone different land
management; NF: Natural forest; OPPB: Oil palm plantation after burning with the age of oil palm plants 5–6 years; RA: Restoration area, after 7 days incubation. Bars
represent standard error (n = 3). Note: a,b,c, in the same enzyme with the different letters on top represent significantly different samples (ANOVA p < 0.05).