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