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Lesson 5Lesson 5

Quiz - Windfirming Treatments Assessment Module

Learning outcome:
  • Know where and how some specific management practices are being used in BC to reduce the likelihood of windthrow.
Assessment Questions:
























  1. What level of treatment effectiveness can be expected from crown and edge treatments based on the studies conducted recently?


A) pruning, topping or feathering provides an average of 75% less damag
B) feathering and crown modification together provide a 65% reduction in damage after one season
C) pruning alone provides the highest level of treatment effectiveness
D) none of the above.

  1. Which crown modification tools are best suited to old growth stands?


A) no tools works well on old growth
B) the heli-shear works best on old growth
C) the heli-saw works best on old growth
D) either of these tools works equally well on old growth.

  1. Identify the major crown treatments and their average costs:


A) heli-saw, average 18 trees/hour, approx. $45/tree
B) heli-shear, average 18 trees/hour, approx. $45/tree
C) manual top pruning, average 1.5 trees/hour, approx. $51/tree
D) all of the above.

  1. What have been the results of Chuck Rowen's studies?

A) we cannot prevent windthrow completely with stand and tree treatments
B) it is critical to complete treatments before October winds begin to blow
C) we can reduce breakage but may still get leaning or uprooting
D) amabilis stands are more susceptible than cedar stands
E) untreated trees are more susceptible than adjacent treated trees
F) all of the above.

  1. Where have most of the studies been conducted recently in BC that investigate stand or tree treatment to reduce the damage from windthrow?

A) throughout the province
B) Vancouver Island and the Queen Charlotte Islands
C) none have been conducted in BC
D) Mid-Coast Forest District.


Forest Service BC
Forest Renewal BC