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