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A concise overview of essential terms and definitions relevant to the isa certified arborist exam. It covers topics such as tree physiology, soil science, fertilization techniques, and tree health management. This study guide is designed to help students and professionals quickly review and understand key concepts in arboriculture, aiding in exam preparation and practical application in the field. It includes definitions of terms like chlorophyll, transpiration, bark, excurrent growth, ph, deciduous, respiration, stomata, xylem, phloem, osmosis, organic matter, cation exchange capacity, girdling roots, taxonomy, angiosperm, gymnosperm, cultivar, monocot, and various arboricultural practices.
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Chlorophyll || - || ✔✔Makes || the || color || or || the || leaves || green || so || photosynthesis || can || take || place Transpiration || - || ✔✔loss || of || water || vapor || from || leaves Bark || - || ✔✔protects || branches || & || trunk || of || tree || from || injury Excurrent || Growth || - || ✔✔Orientation || of || growth || in || external || cell M.A.D.HORSE || - || ✔✔Opposite || leaf || arrangement || MAPLE ASH DOGWOOD HORSECHESTNUT pH || - || ✔✔Measure || of || acidity || or || alkaline || from || 0 || to || 14 <7 || acidic || 7> || Alkaline || 7 || Neutral Decurrent || Growth || - || ✔✔rounded || or || broader || tree || growth Deciduous || - || ✔✔loss || of || leaves || in || the || fall
Respiration || - || ✔✔process || of || converting || food || into || energy Stomata || - || ✔✔pours || in || leaves || that || open || and || close || to || allow || for || water || transportation Xylem || - || ✔✔transportation || for || the || water || and || minerals || throughout || the || tree Phloem || - || ✔✔Conducts || Carbohydrates Osmosis || - || ✔✔Process || how || water || enters || roots Organic || Matter || - || ✔✔organic || components || that || are || decaying || matter || to || help || increase || water || holding || & || nutrients || to || improve || soil || structure Cation || Exchange || Capacity || (CEC) || - || ✔✔measure || of || soils || capacity || to || attract, || retain || & || exchange || a || positive || charge Girdling || Roots || - || ✔✔roots || that || grow || across || or || around || the || trunk, || potentially || choking || off || vascular || tissues || in || a || tree. || May || cause || decline || or || death Taxonomy || - || ✔✔Classification || of || plants Levels || of || Classification || - || ✔✔Kingdom || > || Phylum || > || Class || > || Order || > || Family || > || Genus || > || Species || > || Specific || epithet Angiosperm || - || ✔✔flowering || plant Gymnosperm || - || ✔✔Cone || bearing || plants || and || gingco
Organic || Fertilization || - || ✔✔organic || materials || that || are || carbon || based || that || decompose || slowly Susceptible/Pest || Resistant || - || ✔✔cultivar || selected || to || be || adept || from || a || disease || or || problem Chlorosis || - || ✔✔yellowing || veins || within || the || leaf || from || mineral || loss Fertilizer || Analysis || - || ✔✔the || % || listed || on || the || container || for || the || fert. Complete || Fertilizer || - || ✔✔Nitro || phosphorus || & || potassium || listed || (NPK) Planting || Specifications || - || ✔✔detailed || plans || & || statements || for || landscape Evergreen || - || ✔✔maintain || leaves || throughout || the || seasons Mycorrhizae || - || ✔✔fungus || roots Macropores || - || ✔✔air || filled || soil Rhizosphere || - || ✔✔soil || zone || immediately || surrounding || roots Field || Capacity || - || ✔✔soil || after || gravitational || water || has || drained Buffering || Capacity || - || ✔✔ability || to || maintain || pH
Gravitational || Water || - || ✔✔water || that || drains || from || the || macropores Meristems || - || ✔✔part || of || the || root || that || gets || it || get || bigger Micropores || - || ✔✔tend || to || be || water || filled || soil || particles Clay || - || ✔✔fine || textured || soil || particles; || greater || water || holding || capability Control || of || growth || - || ✔✔genetic || potentials || & || environmental || surroundings Root || Pruning || - || ✔✔pre-digging || to || create || a || more || densely || rooted || ball Sand || - || ✔✔course || textured || particles Nitrogen || - || ✔✔component || of || chlorophyll || & || makes || plant || material || grow || faster/greener Infiltration || Rate || - || ✔✔rate || at || which || water || soaks || into || soil Water || Holding || Capacity || - || ✔✔amount || of || water || held || in || soil || after || drainage || occures Soil || Testing || - || ✔✔provides || info || about || the || pH || of || a || soil || & || can || tell || you || how || much || or || how || little || fert. || is || needed Acclimation || - || ✔✔gradual || process || by || which || a || tree || changes || in || its || environment Slow || Release || Ferts || - || ✔✔release || nutrients || & || nitrogen || slowly || over || a || period || of || time || into || the || soil