ISA Arborist Study Guide Sample test
questions and answers 2024\2025 A+
Grade
Bark, phloem, cambium, xylem
- correct answer 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 answer If the terminal bud is removed in pruning:
The growth rings of a tree:
- correct answer 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 answer layer of cells is responsible for outward growth and increased girth of tree.
Mycorrhizae are:
- correct answer A symbiotic relationship between fungi and roots.
Douglas-fir (Pseudotsuga menziesii) differs from balsam fir (Abies balsamea) in that:
- correct answer They are not in the same genus.
Opposite leaf arrangement is:
- correct answer When two leaves and/or buds are located at the same node on a twig.
Quercus rubra
- correct answer Scientific name of Red Oak.
, Quercus (Oak)
- correct answer This genus of tree usually does not have an opposite leaf arrangement.
Pines
- correct answer These conifers have needles in bundles.
Available oxygen and water
- correct answer 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 answer Are in the upper 6 inches of soil.
Water will drain very slowly out of the planting hole.
- correct answer If a planting hole in a clay soil site is backfilled with sandy soil.
When soil is compacted:
- correct answer Total pore space and the percentage of macropores are reduced.
A characteristic of sandy soils in arid regions is:
- correct answer They tend to become alkaline, and salts build up due to the lack of heavy rainfall.
When irrigating trees:
- correct answer Infrequent, deep soakings are preferable to frequent, shallow waterings.
Sandy soils:
- correct answer Have a higher infiltration rate than clay soils.
A soil is at field capacity when:
- correct answer Gravitational water has drained away.
With sprinkler irrigation:
- correct answer Less frequent waterings of longer duration will reduce the likelihood of salt buildup,
questions and answers 2024\2025 A+
Grade
Bark, phloem, cambium, xylem
- correct answer 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 answer If the terminal bud is removed in pruning:
The growth rings of a tree:
- correct answer 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 answer layer of cells is responsible for outward growth and increased girth of tree.
Mycorrhizae are:
- correct answer A symbiotic relationship between fungi and roots.
Douglas-fir (Pseudotsuga menziesii) differs from balsam fir (Abies balsamea) in that:
- correct answer They are not in the same genus.
Opposite leaf arrangement is:
- correct answer When two leaves and/or buds are located at the same node on a twig.
Quercus rubra
- correct answer Scientific name of Red Oak.
, Quercus (Oak)
- correct answer This genus of tree usually does not have an opposite leaf arrangement.
Pines
- correct answer These conifers have needles in bundles.
Available oxygen and water
- correct answer 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 answer Are in the upper 6 inches of soil.
Water will drain very slowly out of the planting hole.
- correct answer If a planting hole in a clay soil site is backfilled with sandy soil.
When soil is compacted:
- correct answer Total pore space and the percentage of macropores are reduced.
A characteristic of sandy soils in arid regions is:
- correct answer They tend to become alkaline, and salts build up due to the lack of heavy rainfall.
When irrigating trees:
- correct answer Infrequent, deep soakings are preferable to frequent, shallow waterings.
Sandy soils:
- correct answer Have a higher infiltration rate than clay soils.
A soil is at field capacity when:
- correct answer Gravitational water has drained away.
With sprinkler irrigation:
- correct answer Less frequent waterings of longer duration will reduce the likelihood of salt buildup,
