Arborist Prep Course

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Q:1-The primary factor in controlling the depth, spread and distribution of tree roots in the soil is the
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available phosphorus and potassium
pH of the soil
available oxygen and water
genetics of the plant

Q:2-Which evergreen trees have needles in bundles?
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Q:3-Fastigiate trees have a growth form that is
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Q:4-Which of the following should be considered energized with a potentially fatal voltage?
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all wires
electric and cable TV wires
electric and telephone wires
electric wires

Q:5-If the grade must be raised on a construction site, a step that may preserve the trees is
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construction of tree wells
vertical mulching
all of these answers are correct
installation of aeration tiles

Q:6-Staking or guying when planting a tree
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is not always required or necessary
is not necessary for trees greater than 6 inches diameter
is only done for bare root trees
promotes a larger and stronger root system and better trunk taper

Q:7-When irrigating trees
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the foliage should be kept wet at night to reduce transpiration
keeping the soil moist at the root flare reduces girdling root formation
infrequent, but deep soakings are preferable to frequent, shallow waterings
the most beneficial and efficient time to water is mid-afternoon at peak sunlight

Q:8-If a planting hole in a clay soil site is backfilled with sandy soil
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drainage will be improved, helping the tree to establish
the improved texture of the backfill will reduce the chances of girdling roots forming later
nutrients will be more available to the newly established roots within the planting hole
water will drain very slowly out of the planting hole

Q:9-A condition characterized by a cluster of dwarfed shoots on affected twigs is
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verticillium wilt
witches broom

Q:10-A soil is at field capacity when
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the permanent wilting point has been reached
gravitational water has drained away
it is completely saturated
there is no water available to the roots

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