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Arboriculture Glossary of Terms
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| Term | Definition |
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| drop cut |
branch-removal technique consisting of an undercut and then a top cut, usually made farther out on the branch, or with a chain saw, directly over the undercut.
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| drop zone |
predetermined area where cut branches or wood sections will be dropped or lowered from a tree. See landing zone.
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| drop-crotch pruning |
(obsolete) term for a method of reducing the height of a tree. The general rule for cuts is that leaders should be cut back to a lateral capable of assuming apical dominance, if possible, usually at least one-third the diameter of the leader. See reduction.
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| DRT |
acronym for double rope technique. Climbing system in which two separate ropes and two separate anchor points are utilized. Contrast with DdRT and SRT.
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| drum lace |
method of tying the root ball of a balled-and-burlapped tree for moving.
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| dynamic load |
forces created by a moving load. Load that changes with time and motion. Contrast with static load.
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| dynamics |
study of how objects move under the action of forces.
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| dynamometer |
instrument for measuring mechanical force or power.
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