Fig. 9

Experiment to determine the minimum log length that allowed the measurement without end effect. a Strain measurement points on the pith, the outermost part of xylem, and the midpoints between them whose strain values were followed by 10-cm crosscutting (e.g., sample No. 5). b Change of strain values at the five strain measurement points. Change point: L/D ratio of crosscut position where the strain values began to change obviously