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Simulated root water potentials over the night of different root orders in the dry soil portion of a split-pot using the single-branch model of V. corymbosum. Night-time was assumed to begin at 17.00 h and soil on the wet side was assumed to be irrigated at 18.00 h. Observed values for the link between 3rd- and 4th-order roots (Ψ4) (indicated by unfilled circles) and the link between 7th- and 8th-order roots (Ψ8) (indicated by unfilled squares) are also shown.
