ISA Tree Pruning Practices Questions and Answers

Question 1

An arborist is tasked with reducing the length of a major limb on a mature maple tree to provide clearance for a nearby structure.
To maintain structural integrity and promote proper wound closure, which type of pruning cut is most appropriate for this task?

Accepted Answer

A reduction cut (drop-crotching)

Answer

A heading cut

Answer

A flush cut

Answer

A removal cut (collar cut)

Question 2

A client hires an arborist to prune a dense, overgrown crabapple tree. The client's main objective is to allow more light and air to penetrate the canopy. According to ANSI A300 standards, which pruning type should the arborist specify in the work order?

Accepted Answer

Crown thinning

Answer

Crown raising

Answer

Crown cleaning

Answer

Crown restoration

Question 3

While training a young oak tree, an arborist identifies two codominant stems of roughly equal size that are forming a weak, V-shaped union with included bark. To develop a strong central leader and reduce the risk of future failure, the most appropriate long-term strategy is:

Accepted Answer

Subordinate one of the stems by reducing its length.

Answer

Install a cable between the two stems for support.

Answer

Remove both stems to allow a new leader to develop.

Answer

Head back both stems equally to encourage lower branching.

Question 4

Which of the following is a common, negative consequence of "lion's tailing," a pruning practice where an excessive number of interior and lateral branches are removed from limbs?

Accepted Answer

Increased risk of sunscald on branches and branch failure

Answer

Increased light interception by the inner canopy

Answer

Reduced wind resistance and sail effect

Answer

Improved taper and structural stability of the limbs

Question 5

When removing a large, heavy limb from a tree, the three-cut method is recommended primarily to:

Accepted Answer

Prevent the weight of the branch from tearing the bark down the trunk.

Answer

Ensure the final cut is perfectly flush with the trunk.

Answer

Speed up the overall pruning process.

Answer

Sterilize the wound as the final cut is made.

Question 6

According to ANSI A300 pruning standards, what is the general recommendation for the maximum amount of live foliage that should be removed from a mature tree in a single year?

Accepted Answer

25 percent

Answer

10 percent

Answer

50 percent

Answer

As much as needed to achieve the objective

An arborist is tasked with reducing the length of a major limb on a mature maple tree to provide clearance for a nearby structure.To maintain structural integrity and promote proper wound closure, which type of pruning cut is most appropriate for this task?

An arborist is tasked with reducing the length of a major limb on a mature maple tree to provide clearance for a nearby structure.
To maintain structural integrity and promote proper wound closure, which type of pruning cut is most appropriate for this task?