Figure 6: Data on sorghum form Experiment 3 on (A) above-ground dry weight biomass per plant, (B) chlorophyll concentrations of leaves and (C) percent light interception (45 days after sowing) grown in vertisol or ferrosol, according to treatments applied to the sorghum crop (x axis) and to treatments applied to the previous rotation (tomato crop). Cont:Non-fertilised; ACE: Aerated compost extract; NCE: Non-aerated compost extract; Chem: Chemical fertiliser. Means with different letters across soil type and previous treatments indicate significant difference (P < 0.05) and vertical bars represent the standard error of the mean (n = 6).