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excurrent tree

decurrent

Purposes of Pruning

Trees grow in many varied forms.  Some have central leaders with a tall straight trunk (excurrent).  Others develop a wide-spreading crown after forming a short trunk (decurrent).  Between these extremes every intermediate form is to be found.  The natural characteristics of the different kinds of trees should be brought out though landscape use and maintenance practices.  Pruning can do much to mantain tree health and appearance.

There are a number of objectives in pruning, any one of several of which may be your concern.  Since, however, pruning will affect the tree from root to crown, you should be familiar with what pruning will accomplish throughout the tree before you begin to prune.

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