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Categories All categories Arboriculture Terms
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- monoculturethe cultivation or planting of a single species on agricultural land. in a forest setting. or within an urban landscape.
- monoeciousspecies with male and female flowers born on the same plant (contrast with dioecious).
- morphologystudy or the form and structure of plants and other living organisms (contrast with anatomy. physiology. and taxonomy).
- mortality spiralcombination of events or conditions that accelerate decline and. if left untreated. may cause the eventual death of a tree.
- mosaicSymptom of certain viral diseases of plants characterized by intermingled patches of normal and light-green or yellowish color
- mottleIrregular pattern of indistinct light and dark areas
- MoUMemorandum of Understanding
- moving blockin a mechanical advantage pulley system. the pulley that moves.
- moving rope systema fall protection system in which the rope adjustment device advances along a moving line. Doubled rope technique (DdRT) or running rope systems are examples of moving rope systems (contrast with stationary rope system).
- MSDSMaterial Safety Data Sheet
- MTOAMidland Tree Officer's Association
- Muenter (Munter) hitchhitch commonly used to belay a climber.
- mulchmaterial that is spread on the soil surface to reduce weed growth. retain soil moisture. moderate temperature extremes. reduce compaction from pedestrian or vehicle traffic. and/or to improve aesthetic appearance of the landscape. Mulch can be composed of chipped. ground. or shredded organic(...)
- municipal arboriculturea specialized field of arboriculture and urban forestry that deals with management of planted and naturally occurring greenspaces on public land in communities.
- municipal arboristan individual specializing in the fields of arboriculture and urban forestry and having responsibility for the management of all or part of planted and naturally occurring greenspaces on public land in communities (see city forester. urban forester. and tree officer).
- mushroomfleshy. spore-bearing. often stemmed. fruiting body of fungi in the Basidiomycota subdivision.
- MVCDminimum vegetation clearance distance
- myceliumvegetative body of a fungus. Network of branched. fungal filaments (hyphae).
- Mycoplasma-Like Organism (MLO)A genus of bacteria without cell walls (prokaryotes) that are sometimes associated with ash yellows.
- mycorrhizaesymbiotic association between certain fungi and plant roots.
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- NAAnaphthalene acetic acid. National Arborist Association (now TCIA)
- NADFNational Arbor Day Foundation
- NASFNational Association of State Foresters
- NATCCNorth American Tree Climbing Environmental Design Championship
- native speciesplants indigenous to a region. Naturally occurring and not introduced by humans (contrast with exotic species. i11trorlucerl species. and naturalized species).
- natural-crotch riggingrigging methods that utilize natural unions for the rigging points.
- natural enemypredator. parasite. or pathogen that targets an organism.
- natural pruningprocess of branch removal in which the pruning cuts are made at nodes and in relation to the positions of the branch collar and branch bark ridge.
- natural resource inventoryin urban forestry. an evaluation and cataloging of canopy cover. species composition. size distribution of trees in forest preserves. remnants. fragments. and other open spaces. Information on hydrologic. geologic. biologic. historic. or ecological features may be included.
- natural (target) pruningprocess of branch removal in which the pruning cuts are made at nodes and in relation to the positions of the branch collar and branch bark ridge.
- naturalized speciesnon-native species that has become established in a region and propagates without human assistance (compare to exotic species. introduced species. and native species).
- necrosislocalized death of tissue in a living organism.
- nematodemicroscopic roundworm. Many are beneficial organisms. but some feed on plant tissues and may cause disease or damage.
- NESCNational Electrical Safety Code
- nitrogen oxidegaseous compound that results from the high temperatures in internal combustion engines. which in rum causes atmospheric nitrogen to combine with oxygen. Nitrogen oxide (N ) is one of the major components of acid rain.
- NJUGNational Joint Utilities Group
- nodeslightly enlarged growth point on a stem or branch where leaves and buds arise (contrast with i11tenwdc).
- noise attenuationreduction of sound levels.
- nomenclaturescientific naming system for living organisms. Scientific names are Latin (or Latinized fonns of other languages) and written in italics. the genus first (always starting with capital letter). followed by the specific epithet (species. always starting with lowercase letter. e.g.. Quercus alba).
- nonconductive (nonconducting)a material property not capable of conducting heat or electricity (see dielectric).
- noninfectiousdisorders that are not caused by a pathogen and cannot be passed from one host to another.
- nonselective herbicideHerbicide that is phytotoxic to all or most of the plants it comes in contact with
- nontarget organisman organism that is not intended to be damaged or killed by a pesticide but that may still be susceptible to its effects.
- notchwedge cut into a log or tree for felling.
- notch gatein carabiners. a type of gate latch mechanism. Also called pin lock or tooth lock. Has the disadvantage that it may catch on a rope (contrast with kelj lock).
- noxioushandful. injurious. detrimental. or undesirable.
- NPTCNational Proficiency Test Council
- NTTNational Tree Trust
- NUFUNational Urban Forestry Unit
- nursery stockplant obtained from or grown in a nursery and intended to be planted out in the landscape.