72 Basal area mean tree

Basal area is defined as the area per hectare (usually expressed in m²) which is built by all trees standing on one hectare measured at a height of 1.3 m.

The basal area mean tree is defined by its DBH and its HEIGHT as follows:

• DBH (quadratic mean diameter):

  Is calculated from the arithmetric mean of the basal area of all trees (or species specific) or directly from the square root of mean quadratic diameter.

• HEIGHT (height of quadratic mean diameter):

  Is derived as the height from a diameter-height function coresponding to the basal area mean tree diameter.