Figure 8.

Relationship between Ψ_pd and Ψ_md for almond (‘Nonpareil’). A, Data were obtained for trees grafted onto rootstock Nemaguard. The dashed line is a smoothed line (smoothing factor = 60) that best followed the pattern of data points. The solid line is a linear regression fitted across data points (R² = 0.94, m = 0.79, P < 0.0001). B, Relationship of Ψ_pd and slope values derived for the smoothed line in A. Parameters a and c are the maximum slope values, parameter b is the minimum slope value, and γ₁ and γ₂ are the calculated transition points.