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Arboriculture Glossary of Terms
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| Term | Definition |
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| soil structure |
arrangement of soil particles into aggregates.
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| soil texture |
relative fineness or coarseness of a soil due to particle size (sand, silt, and clay).
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| soil-drench application |
method of applying chemicals (usually herbicides or tree growth regulators) to trees through the soil. Normally done by excavating a shallow trench in the soil around the base of the trunk and pouring the compound into the trench.
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| source |
in physiology, plant part that produces carbohydrates. Mature leaves are sources.
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| spear cut |
quickly cutting an upright branch so that it descends upright.
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| species |
taxonomic group of organisms composed of individuals of the same genus that can reproduce among themselves and have similar offspring.
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| specific epithet |
classification name that follows the genus name in scientific nomenclature.
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| specifications |
detailed plans, requirements, and statements of particular procedures and/or standards used to define and guide work.
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| speedline |
rigging line strung in such a way as to allow tree segments to slide to the ground at a distance away from the base of the tree and the drop zone for an ordinary lowering line.
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| speedlining |
using a speedline to avoid obstacles directly under a tree or to efficiently move cut tree segments to a drop zone away from the tree.
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| spider balancer |
balancer utilizing multiple slings to lower a large limb with a wide spread without allowing either the butt or any of the tips to swing or drop down when the limb is cut.
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| splice |
(1) (verb) to join two ropes or to form a static loop in the end of a rope or cable by interweaving the strands. (2) (verb) in cabling, to form a termination loop in common-grade cable by wrapping the successive strands back upon the standing part. See eye splice. (3) (noun) the connection formed by splicing.
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| spliced eye |
see eye splice.
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| spliced-eye sling |
length of rope with an eye spliced in the end. Also called dead-eye sling or eye sling.
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| split-tail |
separate, short length of rope used to tie the friction hitch in a climbing system.
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| splits |
open cracks or fissures in tree trunks or branches.
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| square knot |
knot used to tie together two ropes of equal diameter. Also called reef knot.
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| SRT |
acronym for single rope technique. A static climbing system utilizing a rope pulled over a high anchor, with the running end anchored and the climber utilizing the standing part. Contrast with DdRT and DRT.
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| staking |
supporting a tree with stakes and ties. Usually used in reference to newly planted trees.
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| standing part |
inactive part of a rope. Contrast with running end and working end.
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