Fig. 2

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L’impact mécanique d’une pierre ou d’un bloc contre un arbre (a) va endommager son cambium et créer une blessure (b). En cicatrisant, l’arbre va peu à peu refermer cette blessure qui reste tout de même visible dans les cernes de croissances de l’arbre (c).
The mechanical impact of the block on stem (a) damages its cambium and causes an injury (b). The tree will gradually close this wound, which is still visible in the growth rings (c).
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