Pruning often takes place in stages or lifts.

Timber trees must have a harvestable butt log with a clear stem a minimum of 8 ½ feet in length. Side limbs should be pruned to a height of 9 or 10 feet to allow for stump height and trimming. To produce two logs, a tree must have a clear stem 17 feet in length requiring pruning to a height of 18 to 20 feet. How to Prune.

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Apr 12, For pruning to be effective, knots or detects resulting from them must cause significant product downgrade. Sawing trials of unpruned trees by CSIRO (E.

globulus) and Queensland DPI (E. cloeziana) confirm that knots are the worst grade-limiting defect affecting both appearance and structural grade sawn timber from eucalypt plantations. Waugh and Yangof CSIRO actually concluded that, because of knots.

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Pruning for Timber Quality As a black walnut tree grows in a plantation, removal of branches from the main stem is essential for the development of knot-free veneer quality wood. A rule-of-thumb is to never allow a branch to exceed 1 1/2 to 2 inches in diameter before removal.

Oct 03, When training a young tree, prune back branches below the lowest permanent branch 8 to 12 inches from the trunk as these are temporary branches. Remove any lower branches that are larger than a quarter-inch in diameter. Mar 10, The goal of each is to create a tree with good light and air circulation, attractive qualities and strength. The four most popular tree pruning methods for general pruning are crown thinning, crown raising, crown reduction and crown cleaning.

You may notice that each pruning method involves the crown of the bushdig.barted Reading Time: 9 mins.