Fig. 8. Transpiration rates (E) and critical transpiration rates (Ecrit), which corresponds to the maximum rate at which transpiration begins to level off or even decline to
prevent irreversible hydraulic failure versus the integrated soil water potentials of the whole rooting zone of a natural hardwood forest or a pine plantation growing either in
the coastal or the Piedmont region of North Carolina, USA. Simulations started with soil moisture being at full saturation. Filled and dashed arrows represent 20% and 5% REW,