Growth of a Tree
Timber growth is the process of planting and nurturing seedlings, until they grow into trees, with roots, trunks, branches, leaves, and barks.
Every single tree plant must grow as a standing timber in two ways:
1. Vertical Growth: A tree grows vertically downward, through the roots and shoots, and upward through the stem, branches, and leaves. The root draws water and mineral salts from the earth, which are then transported to the leaves through the stem by photosynthesis.
2. Horizontal Growth: This is the process where the cambium layer produces new layers of cells annually, as the tree hardens outwardly to form the bark. This growth increases the diameter of the tree to become the trunk. Timber or wood is obtained from the trunk.