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Arboriculture Glossary of TermsThere are 1070 entries in this glossary.
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pertaining to leaf shape, lopsided, with one side larger than the other.
pertaining to leaf shape, rounded to approaching semicircular.
standard unit of resistance to the flow of electrical current.
see horticultural oils.
wedge-shaped cut (approximately 70 degrees or greater) used in felling trees or removing tree sections. Contrast with conventional notch and Humboldt notch.
pertaining to leaf or branch arrangement, leaves or branches situated two at each node, across from each other on the stem. Contrast with alternate and whorled.
taxonomic group below the class level but above the family level.
|organic fertilizer (fertiliser, in Briti||
fertilizer derived from plants or animals. Contrast with inorganic fertilizer.
layer of organic matter at the soil surface.
material derived from the growth (and death) of living organisms. The organic components of soil. See compost, green mulch, humus, mulch.
(1) in the United States, the legislative Occupational Safety and Health Act dealing with health and safety in the workplace. (2) in the United States, the Occupational Safety and Health Administration, which administers the act. (3) in Canada, the Occupational Health and Safety Administration (OHSA). See also HSE.
diffusion of water through a semi-permeable membrane from a region of higher water potential (lower salt concentration) to a region of lower water potential (higher salt concentration).
useful work delivered or put out by a machine.
projecting structures used for stabilization on aerial devices, cranes, and other vehicles that support elevated or outstretched loads.
laying of eggs by insects.
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