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Trees—Top Pruning. Street trees should be pruned so that branches will not interfere with pedestrians or vehicles. The roots ofstreet trees are more confined than those of other trees and they re-quire top pruning to balance with the root system. Pruning shouldaim to preserve the natural habit of the trees; but they should alsobe kept symmetrical in form. If the tops become too thick and ex-clude too much light they should be thinned out. Main laterals,however, must not be disturbed, but rather the shoots that springfrom these main laterals should be removed. Specimen trees on lawns require little pruning except to preventbad crotches (which if left might cause splitting), to shorten brancheswhich may affect the symmetry of the tree, to remove dead wood, andsometimes to remove (as in the case of maples and pin oaks) some of thefiner interior branches in order to give more "character" to the tree. |
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