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Table II

Comparison of the monthly mean values for u between the SFS (uSFS0 − 30) and TDP (uTDP) on clear days. Monthly minimum values of daily mean relative extractable soil water (REW) are also shown.

Number of data Monthly mean sap flux density Ratio of sap flux densities Minimum of
(days) (cm3/cm2/h) daily mean REW


Year Month u SFS0 − 30 u TDP uTDP / uSFS0 − 30
2004 Dec. 19 0.85 0.70 0.82 0.53
2005 Jan. 18 0.56 0.33 0.59 0.54
Feb. 17 0.52 0.28 0.54 0.56
Mar. 17 1.1 0.86 0.78 0.55
Apr. 17 1.7 1.7 1.00 0.57
May 22 1.9 1.9 1.00 0.50