The environmental conditions (type of soil, local climatic conditions) are also factors to be taken into account for
the maximum tree capacity. Foresters have established a law called ‘‘self-thinning’’, described hereafter, to evaluate this
maximum capacity. Let us note s∗ the average tree basal area (at the height of 1.3 m) of the forest. Reineke [5] observed
monospecific forests with various densities and various species. Out of these observations he claimed the maximum tree
number nmax(s∗) that a stand can bear is given by the following self-thinning relation: