Figure 4. Ryegrass growth responses to leachates from water washed chars.

Simultaneous confidence intervals (95%) for ryegrass aboveground biomass (A), belowground biomass (B), and leaf area (C) response in Experiment 2 to dissolved compounds from water-washed biochar leachates (Leach) applied as a 5 mL single dose following germination. Leachate treatments are defined in the methods. Significant differences between treatment means are denoted with asterisks (P = < 0.05*, < 0.01**, 0.001***).