Fig. 2
Moisture content (MC) profiles of wood cores (blue) measured by fresh/dry wood weighing and corresponding electrical resistivity (ER) profiles (red) of two different trees (a, b). Each point of the MC profiles corresponds to the 1-cm long core sample shown above. ER values were extracted along with a 2-cm width corresponding to the position of the core. On each profile, the transition from sapwood to heartwood is represented by a solid black line and the stem center by a dotted black line. Three zones (zone S, zone DH, and zone WH) can be differentiated with the naked eye on the cores and are highlighted with different shades of gray on each profile. MC values and their corresponding ER values are displayed according to their position (0 cm corresponds to the trunk center)