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LOUISIANA ARBORIST FINAL EXAM 2025/2026 BANK
QUESTIONS 2 VERSION QUESTIONS NEWEST ACTUAL
EXAM WITH COMPLETE QUESTIONS AND VERIFIED
ANSWERS |ALREADY GRADED A+|
Microorganisms tend to congregate in the rhizosphere, in part,
because:
a) sugar exudates from root tips are a source of food.
b) mycorrhizae fix nitrogen and make it available.
c) root hairs tend to collect cations essential to microorganism
growth.
d) bacteria preferentially feed on the meristem tissue at the root
tips. - ANSWER-A
If a planting hole in a clay soil site is backfilled with sandy soil:
a) drainage will be improved, helping the tree to establish.
b) nutrients will be more available to the newly established roots
within the planting hole.
c) water will drain very slowly out of the planting hole.
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d) the improved texture of the backfill will reduce the chances of
girding roots forming later. - ANSWER-C
When soil is compacted:
a) micropores combine to form macropores.
b) soil particles are broken up, giving soil a finer texture.
c) a high water content will reduce the damaging effects.
d) total pore space and the percentage of macropores are
reduced. - ANSWER-D
A characteristic of sandy soils in arid regions is that they:
a) tend to become alkaline, and salts build up due to lack of heavy
rainfall.
b) tend to become acid because basic ions leach out.
c) are fine in texture due to high sand content.
d) have a high water-holding capacity because rainfall is scare. -
ANSWER-A
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When are the most beneficial times to irrigate plants? - ANSWER-
Late night or early morning.
What is the rate in which water soaks into the soil? - ANSWER-
Infiltration
In most instances, it is preferable to minimize water irrigation
directly to the foliage of plants. - ANSWER-True
What is a measure of the rate of water used by plants and
evaporation from the soil known as? - ANSWER-
Evapotranspiration
What is a landscape specifically designed to collect and hold
stormwater runoff called? - ANSWER-Rain Garden
What are materials sprayed on plants to reduce water loss
through transpiration? - ANSWER-Antitranspirants
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Name 3 items used to monitor soil wetness or dryness. -
ANSWER-Soil probes, tensiometers, and electronic moisture
sensors
Drought problems can be especially severe following periods of
moderate to high soil moisture conditions. - ANSWER-True
Name 3 tree health problems associated with flooding: -
ANSWER-Root suffocation/death
Soil organisms killed
Predisposition to other stress factors
Root collar rot
Tree prone to toppling
Mineral toxicities
In sites where poor drainage can be a problem, which of the
following will NOT help ensure plant survival?
a) careful plant selection and shallow planting.
b) improvement of surface drainage by changing the grade, or
trenching.
LOUISIANA ARBORIST FINAL EXAM 2025/2026 BANK
QUESTIONS 2 VERSION QUESTIONS NEWEST ACTUAL
EXAM WITH COMPLETE QUESTIONS AND VERIFIED
ANSWERS |ALREADY GRADED A+|
Microorganisms tend to congregate in the rhizosphere, in part,
because:
a) sugar exudates from root tips are a source of food.
b) mycorrhizae fix nitrogen and make it available.
c) root hairs tend to collect cations essential to microorganism
growth.
d) bacteria preferentially feed on the meristem tissue at the root
tips. - ANSWER-A
If a planting hole in a clay soil site is backfilled with sandy soil:
a) drainage will be improved, helping the tree to establish.
b) nutrients will be more available to the newly established roots
within the planting hole.
c) water will drain very slowly out of the planting hole.
, Page |2
d) the improved texture of the backfill will reduce the chances of
girding roots forming later. - ANSWER-C
When soil is compacted:
a) micropores combine to form macropores.
b) soil particles are broken up, giving soil a finer texture.
c) a high water content will reduce the damaging effects.
d) total pore space and the percentage of macropores are
reduced. - ANSWER-D
A characteristic of sandy soils in arid regions is that they:
a) tend to become alkaline, and salts build up due to lack of heavy
rainfall.
b) tend to become acid because basic ions leach out.
c) are fine in texture due to high sand content.
d) have a high water-holding capacity because rainfall is scare. -
ANSWER-A
, Page |3
When are the most beneficial times to irrigate plants? - ANSWER-
Late night or early morning.
What is the rate in which water soaks into the soil? - ANSWER-
Infiltration
In most instances, it is preferable to minimize water irrigation
directly to the foliage of plants. - ANSWER-True
What is a measure of the rate of water used by plants and
evaporation from the soil known as? - ANSWER-
Evapotranspiration
What is a landscape specifically designed to collect and hold
stormwater runoff called? - ANSWER-Rain Garden
What are materials sprayed on plants to reduce water loss
through transpiration? - ANSWER-Antitranspirants
, Page |4
Name 3 items used to monitor soil wetness or dryness. -
ANSWER-Soil probes, tensiometers, and electronic moisture
sensors
Drought problems can be especially severe following periods of
moderate to high soil moisture conditions. - ANSWER-True
Name 3 tree health problems associated with flooding: -
ANSWER-Root suffocation/death
Soil organisms killed
Predisposition to other stress factors
Root collar rot
Tree prone to toppling
Mineral toxicities
In sites where poor drainage can be a problem, which of the
following will NOT help ensure plant survival?
a) careful plant selection and shallow planting.
b) improvement of surface drainage by changing the grade, or
trenching.
