Table 1 Tree and porosity variables used in the analysis, measured at fixed stem heights (h), from the base (h = 0.30 m) and at each 1-m interval upwards
From: Variation of cork porosity along the stem in harvested cork oak (Quercus suber L.) trees
Variables | Abbreviation (units) | Description |
|---|---|---|
Tree data | ||
Diameter at breast height | Dbh (cm) | Mean stem diameter over cork, at 1.30-m height |
Harvesting height | H (m) | Maximum stem harvested height above ground |
Fixed stem heights | h (m) | Fixed heights above ground along the harvested stem |
Diameter over cork | Dh (cm) | Mean stem diameter over cork at fixed height, h |
Relative distance height | hH | Ratio between fixed stem height h and the breast height (1.30 m) |
Cork sample cross-section data at height | ||
Maximum area | Amax (mm2) | Maximum value of the area of the lenticular channels |
Maximum width | Wmax (mm) | Maximum value of the width of the lenticular channels |
Maximum length | Lmax (mm) | Maximum value of the length of the lenticular channels |
Porosity coefficient | CP (%) | Lenticular channels area relative to the total cross-section area |
Number of pores | NP (n/100 cm2) | Number of lenticular channels per 100 cm2 |