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Fig. 1. Graph of relative transpiration rate (RT) calculated for various fractions of transpirable soil water (FTSW) based on assumed leaf water potentials of –1.0, –1.5, or –2.0 MPa. Solid symbols are for cases where the range of transpirable soil was held constant at 0.13. Open symbols are included to show the recalculation of RT when the range of transpirable soil was assumed equal to 0.12 for hydrostatic pressure in leaves during period of active transpiration (
leaf) equal to –1.0 MPa and 0.14 for leaf equal to –2.0 MPa.
