Figure 3
From: Origin and hydrodynamics of xylem sap in tree stems, and relationship to root uptake of soil water
Relationships between soil water and sapwood sap δ18O values in sugi trees (n = 3). (a) Rainwater collected at a depth of 0 cm and (b–f) soil water collected at depths of (b) 20 cm, (c) 50 cm, (d) 100 cm, (e) 150 cm, and (f) 200 cm.
