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c. Trunk in elevation
Begin by cutting a first part from below and then from above.
Then, on the second part, repeat this operation.
f. Pruning of a felled tree
Observe first the direction of flexion of the branch. Make
a first notch on the side in flexion and finish the cut on the
opposite side.
g. Pruning a tree
Begin pruning by nicking the tree from below and then finish
at the top.
