LOUISIANA ARBORIST EXAM 2026
QUESTIONS AND VERIFIED ANSWERS |
GRADED A+ (2026/2027 UPDATED)
Sulfur-coated urea or urea formaldehyde is sometimes included in nitrogen
fertilizers because:
a) slow-release is desired.
b) the soil pH must be adjusted to optimize nutrient uptake.
c) the soil's buffering capacity may inhibit nitrogen absorption.
d) urea is a good, natural source of phosphorus. - Correct Answer -A
What species of tree would not be appropriate for planting under utility wires? -
Correct Answer -Any species that grows higher than the wires.
What is the ability of a tree to withstand low temperatures and winter stresses in
a given site? - Correct Answer -Hardiness
Name 3 site characteristics that must be considered in tree selection. - Correct
Answer -Growing space
Light conditions
,Soil conditions
Climate
Functional requirements
What type of important tree selection are upright, pyramidal, and weeping? -
Correct Answer -Growth habits
Name 3 plant characteristics that may make a tree aesthetically desireable? -
Correct Answer -Flowers
Attractiveness to birds
Fall color
Exfoliating bark
Growth habit
What is the gradual process by which a tree adapts to changes in its environment?
- Correct Answer -Acclimation
A tree listed as adaptable to wet soil conditions will always thrive if planted in
those conditions. - Correct Answer -False
,What is the climatic factor that determines hardiness in zones? - Correct Answer -
Low temperature extremes
Some trees acclimate to shade conditions by:
a) developing larger leaves
b) developing smaller leaves
c) variegated foliage losing variegation, or colored foliage tending to be greener.
d) any or all of the above - Correct Answer -D
Fastigiate trees have a growth form that is:
a) upright
b) weeping
c) overaching
d) vase-shaped - Correct Answer -A
If a tree declines or dies within the first year following installation, a likely cause is
excess or insufficient water. - Correct Answer -True
, Leaf scorch, girdling roots, and mineral deficiencies are examples of what kind of
disorder? - Correct Answer -Abiotic
Insect damage to trees is usually the result of what? - Correct Answer -Feeding
and egg laying
Name 5 types of tree insect pests with chewing mouth parts. - Correct Answer -
Beetles
Caterpillars
Weevils
Leafminers
Borers
Webworms
Name 5 types of tree insect pests with piercing/sucking mouth parts. - Correct
Answer -Aphids, Adelgids
Scales
Leafhoppers
Mealybugs
True bugs
Psyllids
QUESTIONS AND VERIFIED ANSWERS |
GRADED A+ (2026/2027 UPDATED)
Sulfur-coated urea or urea formaldehyde is sometimes included in nitrogen
fertilizers because:
a) slow-release is desired.
b) the soil pH must be adjusted to optimize nutrient uptake.
c) the soil's buffering capacity may inhibit nitrogen absorption.
d) urea is a good, natural source of phosphorus. - Correct Answer -A
What species of tree would not be appropriate for planting under utility wires? -
Correct Answer -Any species that grows higher than the wires.
What is the ability of a tree to withstand low temperatures and winter stresses in
a given site? - Correct Answer -Hardiness
Name 3 site characteristics that must be considered in tree selection. - Correct
Answer -Growing space
Light conditions
,Soil conditions
Climate
Functional requirements
What type of important tree selection are upright, pyramidal, and weeping? -
Correct Answer -Growth habits
Name 3 plant characteristics that may make a tree aesthetically desireable? -
Correct Answer -Flowers
Attractiveness to birds
Fall color
Exfoliating bark
Growth habit
What is the gradual process by which a tree adapts to changes in its environment?
- Correct Answer -Acclimation
A tree listed as adaptable to wet soil conditions will always thrive if planted in
those conditions. - Correct Answer -False
,What is the climatic factor that determines hardiness in zones? - Correct Answer -
Low temperature extremes
Some trees acclimate to shade conditions by:
a) developing larger leaves
b) developing smaller leaves
c) variegated foliage losing variegation, or colored foliage tending to be greener.
d) any or all of the above - Correct Answer -D
Fastigiate trees have a growth form that is:
a) upright
b) weeping
c) overaching
d) vase-shaped - Correct Answer -A
If a tree declines or dies within the first year following installation, a likely cause is
excess or insufficient water. - Correct Answer -True
, Leaf scorch, girdling roots, and mineral deficiencies are examples of what kind of
disorder? - Correct Answer -Abiotic
Insect damage to trees is usually the result of what? - Correct Answer -Feeding
and egg laying
Name 5 types of tree insect pests with chewing mouth parts. - Correct Answer -
Beetles
Caterpillars
Weevils
Leafminers
Borers
Webworms
Name 5 types of tree insect pests with piercing/sucking mouth parts. - Correct
Answer -Aphids, Adelgids
Scales
Leafhoppers
Mealybugs
True bugs
Psyllids
