Fig. 2
From: Variation of cork porosity along the stem in harvested cork oak (Quercus suber L.) trees
a Correlation matrix: height in the stem (h) and size variables of cork porosity (maximum area, Amax; maximum width, Wmax; maximum length, Lmax). b Correlation matrix: height in the stem (h), porosity coefficient (CP), number of lenticular channels (NP) and stem diameter over cork (Dh)