Capitolo 36
and if we do so it depends, theoretically at least, on if it
it is best that sowing artificial or planting. In short, selection
picked penetrating the most mature trees of a perpetual forest, while
clean cut destroys the forest to start a completely
growing new and more express one.
Clean cut is therefore necessary as natural in to give
with intolerant trees. But it doesn't follow but the selection
system, even if kind tolerant disposition, is only the one adaptable
to them. While the light of one class applications, the other doesn't do
shade of application. It is only able to bear him/it. Indeed, except
for the greatest susceptibility of some heat kind extreme
and the aridity when very young, as a shade of rule trees that it brings grow
very best if theirs have light and ample provisioning. Accordingly clean
to cut can be also the better system for these economic certain bottom
conditions.
Besides his/her influence on the event of kind in the forest,
practically turns on it governs the physical form of the individual tree.
If adult in an opening and not it artificially pruned, a tree will have
a conic trunk and living branches almost down to the earth. The
denser and accordingly more dark color the forest, the most cylindrical the
trunk, the smallest the branches crown and the greatest the clear one
length. The individual tree doesn't have object in to suppose a desirable
commercial form and ago so only when deprived of light of side from
numerous neighbors. Then it sacrifices the growth of height diameter
the growth in to reach the light of top necessary for his/her life. To
the same time the lowest branches are killed by shade and they allow to fall away,
the being of scars recovered and eventually buried. The pin knots near
the center of a great clear trunk is the branches rests that
when way of living was to the top of the young tree.
This is because, if it is to produce the good lumber, some forest has to be
dense enough to cover the earth in the whole first part of his
life at least. When we see a clear and excellent stand of Douglas I mature