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Exam (elaborations)

ISA Arborist Study Guide Sample test questions and answers

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ISA Arborist Study Guide Sample test questions and answers

Institution
ISA Certified Arborist
Course
ISA Certified Arborist

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ISA Arborist Study Guide Sample
test questions and answers
Bark,Mphloem,Mcambium,MxylemM-
MAnswerMWhenMcuttingMthroughMaMtreeMwithMaMchainMsawMorMdrillingMintoMaMtree,
MyouMwouldMpassMthroughM(inMorder)



GrowthMmayMbeMstimulatedMinMlateralMbudsM-
MAnswerMIfMtheMterminalMbudMisMremovedMinMpruning:



TheMgrowthMringsMofMaMtree:M-
MAnswerMVisibleMbecauseMofMtheMrapidMgrowthMrateMofMearlywoodMrelativeMtoMlatewo
od,McanMbeMcountedMonMtoMapproximateMtreesMage,McanMgiveMinformationMaboutMgro
wthMconditionsMinMpreviousMyears.



CambiumM-
MAnswerMlayerMofMcellsMisMresponsibleMforMoutwardMgrowthMandMincreasedMgirthMofM
tree.



MycorrhizaeMare:M-MAnswerMAMsymbioticMrelationshipMbetweenMfungiMandMroots.



Douglas-
firM(PseudotsugaMmenziesii)MdiffersMfromMbalsamMfirM(AbiesMbalsamea)MinMthat:M-
MAnswerMTheyMareMnotMinMtheMsameMgenus.



OppositeMleafMarrangementMis:M-
MAnswerMWhenMtwoMleavesMand/orMbudsMareMlocatedMatMtheMsameMnodeMonMaMtwi
g.



QuercusMrubraM-MAnswerMScientificMnameMofMRedMOak.



QuercusM(Oak)M-
MAnswerMThisMgenusMofMtreeMusuallyMdoesMnotMhaveManMoppositeMleafMarrangement.



PinesM-MAnswerMTheseMconifersMhaveMneedlesMinMbundles.

, AvailableMoxygenMandMwaterM-
MAnswerMTheMprimaryMfactorMinMcontrollingMtheMdepth,Mspread,MandMdistributionMofMt
reeMrootsMinMtheMsoilMis/are:



TheMmostMfibrousMandMabsorptiveMportionMofMaMtree'sMrootMsystemMisMfoundMin?M-
MAnswerMAreMinMtheMupperM6MinchesMofMsoil.



WaterMwillMdrainMveryMslowlyMoutMofMtheMplantingMhole.M-
MAnswerMIfMaMplantingMholeMinMaMclayMsoilMsiteMisMbackfilledMwithMsandyMsoil.



WhenMsoilMisMcompacted:M-
MAnswerMTotalMporeMspaceMandMtheMpercentageMofMmacroporesMareMreduced.



AMcharacteristicMofMsandyMsoilsMinMaridMregionsMis:M-
MAnswerMTheyMtendMtoMbecomeMalkaline,MandMsaltsMbuildMupMdueMtoMtheMlackMofM
heavyMrainfall.



WhenMirrigatingMtrees:M-
MAnswerMInfrequent,MdeepMsoakingsMareMpreferableMtoMfrequent,MshallowMwaterings.



SandyMsoils:M-MAnswerMHaveMaMhigherMinfiltrationMrateMthanMclayMsoils.



AMsoilMisMatMfieldMcapacityMwhen:M-MAnswerMGravitationalMwaterMhasMdrainedMaway.



WithMsprinklerMirrigation:M-
MAnswerMLessMfrequentMwateringsMofMlongerMdurationMwillMreduceMtheMlikelihoodMofM
saltMbuildup,MwaterMhittingMtheMsoilMsurfaceMcanMleadMtoMcrusting,MapplicationMratesM
thatMexceedMabsorptionMcanMleadMtoMrunoff.



InMsitesMwhereMpoorMdrainageMcanMbeMaMproblem,MwhichMofMtheMfollowingMWILLMNO
TMhelpMensureMplantMsurvival?M-
MAnswerMPlacingMgravelMinMtheMbottomMofMtheMplantingMholeMandMbackfillingMwithMa
MsandyMsoil.



8MpoundsMofMnitrogenM-MAnswerM80MpoundMbagMofM10-6-
4MfertilizerMcontainsMhowMmanyMpoundsMofMactualMnitrogen?
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ISA Certified Arborist
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ISA Certified Arborist

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Uploaded on
April 4, 2026
Number of pages
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Written in
2025/2026
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