Fig. 4

Mean biomass (a) and N content (b) (± standard deviation) of above-ground compartments of Acacia mangium and Eucalyptus grandis trees in the monospecific stands (100A and 100E, respectively) and the mixed-species stand (50E:50A–Acacia and 50E:50A–Eucalyptus) at 39 months of age. No statistical differences were found between blocks (p ≥ 0.16). Different letters indicate differences between treatments (p < 0.05) in the total tree biomass and N content of the above-ground compartments. Stem biomass in 100A, 100E, 50E:50A–Acacia and 50E:50A–Eucalyptus were 19.9, 49.6, 8.0, and 22.9 Mg ha⁻¹, respectively