ISA Arborist Study Guide Sample test
questions and answers with verified
study solutions | updated!!
Bark, phloem, cambium, xylem CORRECT ANSWERS When cutting through a tree with
a chain saw or drilling into a tree, you would pass through (in order)
Growth may be stimulated in lateral buds CORRECT ANSWERS If the terminal bud is
removed in pruning:
The growth rings of a tree: CORRECT ANSWERS Visible because of the rapid growth
rate of earlywood relative to latewood, can be counted on to approximate trees age, can
give information about growth conditions in previous years.
Cambium CORRECT ANSWERS layer of cells is responsible for outward growth and
increased girth of tree.
Mycorrhizae are: CORRECT ANSWERS A symbiotic relationship between fungi and
roots.
Douglas-fir (Pseudotsuga menziesii) differs from balsam fir (Abies balsamea) in that:
CORRECT ANSWERS They are not in the same genus.
Opposite leaf arrangement is: CORRECT ANSWERS When two leaves and/or buds are
located at the same node on a twig.
Quercus rubra CORRECT ANSWERS Scientific name of Red Oak.
Quercus (Oak) CORRECT ANSWERS This genus of tree usually does not have an
opposite leaf arrangement.
Pines CORRECT ANSWERS These conifers have needles in bundles.
Available oxygen and water CORRECT ANSWERS The primary factor in controlling the
depth, spread, and distribution of tree roots in the soil is/are:
The most fibrous and absorptive portion of a tree's root system is found in? CORRECT
ANSWERS Are in the upper 6 inches of soil.
Water will drain very slowly out of the planting hole. CORRECT ANSWERS If a planting
hole in a clay soil site is backfilled with sandy soil.
, When soil is compacted: CORRECT ANSWERS Total pore space and the percentage
of macropores are reduced.
A characteristic of sandy soils in arid regions is: CORRECT ANSWERS They tend to
become alkaline, and salts build up due to the lack of heavy rainfall.
When irrigating trees: CORRECT ANSWERS Infrequent, deep soakings are preferable
to frequent, shallow waterings.
Sandy soils: CORRECT ANSWERS Have a higher infiltration rate than clay soils.
A soil is at field capacity when: CORRECT ANSWERS Gravitational water has drained
away.
With sprinkler irrigation: CORRECT ANSWERS Less frequent waterings of longer
duration will reduce the likelihood of salt buildup, water hitting the soil surface can lead
to crusting, application rates that exceed absorption can lead to runoff.
In sites where poor drainage can be a problem, which of the following WILL NOT help
ensure plant survival? CORRECT ANSWERS Placing gravel in the bottom of the
planting hole and backfilling with a sandy soil.
8 pounds of nitrogen CORRECT ANSWERS 80 pound bag of 10-6-4 fertilizer contains
how many pounds of actual nitrogen?
Nitrogen, phosphorus, potassium CORRECT ANSWERS A complete fertilizer contains?
A tree may not respond immediately to a fertilizer application if: CORRECT ANSWERS
A slow release fertilizer was applied, inadequate soil moisture, and a tree is suffering
from collar rot
A soil test may not identify a nutrient deficiency problem in a plant because: CORRECT
ANSWERS The soil may have adequate nutrients but something may be inhibiting
uptake.
Sulfur-coated urea/ or ureaformaldehyde is sometimes included in nitrogen fertilizers
because: CORRECT ANSWERS Slow-release forms of nitrogen are sometimes
desired.
The climate factor that determines hardiness zones is: CORRECT ANSWERS Low
temperature extremes
Trees planted under utility lines should be: CORRECT ANSWERS Low growing to
remain below the lines.
questions and answers with verified
study solutions | updated!!
Bark, phloem, cambium, xylem CORRECT ANSWERS When cutting through a tree with
a chain saw or drilling into a tree, you would pass through (in order)
Growth may be stimulated in lateral buds CORRECT ANSWERS If the terminal bud is
removed in pruning:
The growth rings of a tree: CORRECT ANSWERS Visible because of the rapid growth
rate of earlywood relative to latewood, can be counted on to approximate trees age, can
give information about growth conditions in previous years.
Cambium CORRECT ANSWERS layer of cells is responsible for outward growth and
increased girth of tree.
Mycorrhizae are: CORRECT ANSWERS A symbiotic relationship between fungi and
roots.
Douglas-fir (Pseudotsuga menziesii) differs from balsam fir (Abies balsamea) in that:
CORRECT ANSWERS They are not in the same genus.
Opposite leaf arrangement is: CORRECT ANSWERS When two leaves and/or buds are
located at the same node on a twig.
Quercus rubra CORRECT ANSWERS Scientific name of Red Oak.
Quercus (Oak) CORRECT ANSWERS This genus of tree usually does not have an
opposite leaf arrangement.
Pines CORRECT ANSWERS These conifers have needles in bundles.
Available oxygen and water CORRECT ANSWERS The primary factor in controlling the
depth, spread, and distribution of tree roots in the soil is/are:
The most fibrous and absorptive portion of a tree's root system is found in? CORRECT
ANSWERS Are in the upper 6 inches of soil.
Water will drain very slowly out of the planting hole. CORRECT ANSWERS If a planting
hole in a clay soil site is backfilled with sandy soil.
, When soil is compacted: CORRECT ANSWERS Total pore space and the percentage
of macropores are reduced.
A characteristic of sandy soils in arid regions is: CORRECT ANSWERS They tend to
become alkaline, and salts build up due to the lack of heavy rainfall.
When irrigating trees: CORRECT ANSWERS Infrequent, deep soakings are preferable
to frequent, shallow waterings.
Sandy soils: CORRECT ANSWERS Have a higher infiltration rate than clay soils.
A soil is at field capacity when: CORRECT ANSWERS Gravitational water has drained
away.
With sprinkler irrigation: CORRECT ANSWERS Less frequent waterings of longer
duration will reduce the likelihood of salt buildup, water hitting the soil surface can lead
to crusting, application rates that exceed absorption can lead to runoff.
In sites where poor drainage can be a problem, which of the following WILL NOT help
ensure plant survival? CORRECT ANSWERS Placing gravel in the bottom of the
planting hole and backfilling with a sandy soil.
8 pounds of nitrogen CORRECT ANSWERS 80 pound bag of 10-6-4 fertilizer contains
how many pounds of actual nitrogen?
Nitrogen, phosphorus, potassium CORRECT ANSWERS A complete fertilizer contains?
A tree may not respond immediately to a fertilizer application if: CORRECT ANSWERS
A slow release fertilizer was applied, inadequate soil moisture, and a tree is suffering
from collar rot
A soil test may not identify a nutrient deficiency problem in a plant because: CORRECT
ANSWERS The soil may have adequate nutrients but something may be inhibiting
uptake.
Sulfur-coated urea/ or ureaformaldehyde is sometimes included in nitrogen fertilizers
because: CORRECT ANSWERS Slow-release forms of nitrogen are sometimes
desired.
The climate factor that determines hardiness zones is: CORRECT ANSWERS Low
temperature extremes
Trees planted under utility lines should be: CORRECT ANSWERS Low growing to
remain below the lines.
