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ISA ARBORIST CHAPTER 8 PRUNING
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ISA ARBORIST CHAPTER 8 PRUNING
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ISA ARBORIST CHAPTER 8: PRUNING2023-2024
Because pruning removes leaves and reduces the overall photosynthetic capacity of a
tree, it also reduces _______. - growth
Name five common reasons for removing limbs from trees. - dead
diseased
hazardous
crossing
thinning for light or air penetration
weight reduction
size reduction
obstructing signs, views, clearance, etc.
To maximize flowering, plants that bloom on current season's wood should be pruned
prior to ______ ______, or in the summer after bloom has occurred. Plants that bloom
on last season's wood should be pruned just after ______. - leaf emergence
bloom
True/False - Trees that tend to "bleed" should never be pruned in the early spring
because doing so is likely to cause a major decline in vigor. - False
______ ______ is bark that gets pushed inside the branch union as two branches grow
and develop. - included bark
The swollen area at the base of a branch where it arises from the trunk is called the
______ ______. - branch collar
Two limbs that arise from apical buds on the same stem are known as ______ ______,
and are both direct extensions of the stem below. - codominant stems/branches
True/False - In the absence of included bark, the relative size of a branch in relation to
the trunk is more important for strength of branch attachment than is the angle of
attachment. - True
True/False - Codominant stems can represent a structurally unstable branch
configuration, especially if there is included bark in the junction. - True
When training young trees, a single central leader should be selected and competing
leaders should be removed or ______. - subordinated
True/False - As a general rule, mature trees are less tolerant of severe pruning than
juvenile trees. - True
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