Isa Glossary (I&j&k&l)

Front 1

i-tree

Back 1

suite of software products and management tools that allows the user to inventory the Urban forest and analyze its cost, benefits and management needs

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Identification key

Back 2

Diagnostic Aid to help identify plants and other organisms

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Implant

Back 3

device, capsule, or pellet inserted into the trees xylem system to treat or prevent diseases, disorders, or pest problems. Requires a relatively large diameter and deep hole in the trunk. Contrast with microinjection

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Included bark

Back 4

Bark that becomes embedded in a crotch (Union) between branch and trunk or between codominant stems. Causes a weak structure

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Increment borer

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Device used to take core samples from trees to determine age or detect problems, such as decay

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Indicator plant

Back 6

Plant species that exhibit early, reversible symptoms of drought stress and are specifically used in hydro zones to signal a need for watering

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Indirect contact

Back 7

Exposure to electrical current by touching an electrical conductor that is in contact with an energized conductor

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Infectious

Back 8

Capable of being spread to plants from other plants or organisms

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Infiltration

Back 9

(1) downward entry of water into the soil. Contrast with percolation (2)entry of fine particles into drainage or aeration systems; can lead to system clogging and failure (3)downward entry of materials from one soil or fill layer to another, as when a gravel road surface mixes with underlying soil

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Infiltration rate

Back 10

Speed at which water penetrates the soil

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Inflorescence

Back 11

Cluster of flowers

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Injection

Back 12

Method of putting a liquid fertilizer or pesticide directly into the soil or a plant's tissue

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Inorganic

Back 13

Not containing carbon. Not containing organic material. Contrast with organic

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Insect growth regulator

Back 14

Substance, man-made or naturally occurring in insects, that affects growth and development of insects

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Insecticidal soap

Back 15

Soap-based pesticide approved for application to plants to kill insects and certain mites by disrupting the cell membranes

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Insecticide

Back 16

Substance toxic to insects

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Integrated pest Management (IPM)

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Method of controlling plants pests by combining biological, cultural, mechanical, physical, and/or chemical management strategies

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Internodal

Back 18

Between the nodes on a stem

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Internode

Back 19

Region of the stem between two successive nodes. Contrast with node

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Introduced species

Back 20

Organisms not native to a region. Contrast with native species and naturalized species

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Ion

Back 21

Atom or a group of atoms with a positive or negative charge

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Job briefing

Back 22

brief meeting of a tree crew at the start of every job to communicate the work plan, responsibilities and requirements, and any potential hazards

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Kerf

Back 23

Slit or cut made by a saw in a log. Space created by a saw cut

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Kickback

Back 24

Sudden, sometimes violent and uncontrolled, backward or upward movement of a chainsaw

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Kickback quadrant

Back 25

Upper quadrant of the tip of a chainsaw bar

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Kingdom

Back 26

Primary taxonomic group, separating plants from animals

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Lag eye

Back 27

Lag threaded cable anchor with a closed eye

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Lag hook/ J-hook

Back 28

Lag threaded cable anchor with an open eye (J-shaped)

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Lag threaded rod

Back 29

bracing rod with a coarse thread pattern that is typically screwed into a pre-drilled hole that is smaller in diameter than the anchor or rod. Contrast with machine threaded rod

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Landing zone

Back 30

Predetermined area where cut branches or wood sections will be dropped or lowered from a tree. See drops zone

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Lanyard

Back 31

Short rope equipped with carabiners, snaps, and or eye splices. work positioning lanyards are used for temporarily securing a climber in one place

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Lateral

Back 32

Secondary or subordinate Branch or root

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Lateral bud

Back 33

Vegetative Bud on the side of a stem. Contrast with terminal bud

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Lateral root

Back 34

Root that arises by cell division in the pericycle of the parent root and then penetrates the cortex and epidermis

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Leach(leaching)

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(1) tendency for elements or compounds to wash down through the soil (2)tendency for elements or compounds to wash into the soil. For example, alkaline compounds may leach from concrete, Or heavy metals May Leach from aggregates, and both may damage plants

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Leader

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Primary terminal shoot or trunk of a tree. Large, usually upright stem. A stem that dominates a portion of the crown by suppressing lateral branches

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Leadership in energy and environmental design (LEED)

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Green building rating system developed by the u.s.green building council(USGBC) to provide standards for environmentally sustainable construction and building management practices

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Leaf Apex

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Tip of the leaf blade

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Leaf axil

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Point of attachment of a leaf petiole to a stem

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Leaf base

Back 40

Bottom part of the leaf blade

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Leaf blotch

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Irregularly shaped areas of disease on plants foliage

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Leaf margin

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Outer edge of the leaf blade

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Leaf spot

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Patches of disease or other damage on plant foliage

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Leg protection

Back 44

Type of PPE. Any clothing or device to protect the legs from various injuries. Chaps or other chain saw-resistant clothing worn over the legs when operating a chainsaw

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Lenticel

Back 45

Small opening in the bark that permits the exchange of gases

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Liability

Back 46

Something for which one is responsible. Legal responsibility

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Lignin

Back 47

organic substance that impregnates certain cell walls to thicken and strengthen the cell to reduce susceptibility to decay and pest damage

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Lion tailing (lions tailing)

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Poor pruning practice in which an excessive number of branches are thinned from the inside and lower part of specific limbs or a tree crown, leaving mostly terminal foliage. Results in poor Branch taper, poor wind load distribution, and a higher risk of branch failure

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Liquid injection fertilization

Back 49

Applying liquid formulations of fertilizer by injection into the root zone of a tree

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Load

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(1) general term used to indicate the magnitude of a force, bending moment, torque, pressure, etc., Applied to a substance or material. (2) cargo; weight to be borne or conveyed

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Load line

Back 51

Rope used to lower a tree branch or segment that has been cut. Lowering line

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Loam

Back 52

Soil texture classification based on a certain ratio of sand, silt, and clay. Considered ideal for plant growth

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Lobe

Back 53

Leaf segments that project outward, creating voids (sinuses) between the segments

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Lowering device

Back 54

brand name of a piece of equipment that is attached to the tree base or other anchor in rigging. Used to take wraps with the load lines to provide friction for controlled lowering of sections of a tree