Fig. 2.

Relationship between measured leaf area (A), shoot biomass (B), plant height (C), and height to the ligule of the youngest fully expanded leaf (D) with projected measurements calculated from image analysis. Projected leaf area provides a strong indication of overall plant growth with a significant, positive correlation observed between projected and measured leaf area (R ²=0.97; y=0.94x+68.23) and above-ground biomass (R ²=0.91; y=138.69x+91.92). Projected height measurements positively correlated with plant height (R ²=0.98; y=0.98x–0.73) and height to ligule of the youngest fully expanded leaf (R ²=0.94; y=0.79x+2.24).