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28. This blight was responsible for killing off one of the msot important trees in N. America starting in 1904. What was the name of the blight?

29. Fill in the blank ____________is the art and science of controlling the establishment, growth, composition, and quality of forest vegetation for the full range of forest resource objectives.

30. What type of silviculture system?

31. The entire cutting unit is managed as it is with clearcut systems. However, for a designated time period, those trees selected for supplying seed are not harvested. Trees are generally left just to supply seed for the next crop; therefore, the best phenotypes should be selected to try to encourage desirable genetic traits.

32. What type of silviculture system? The old stand is removed in a series of cuttings to promote the establishment of an essentially even-aged new stand under the shelter of the old one. Stand tending treatments are conducted to facilitate future harvesting in this manner.

33. What type of silviculture system? An even-aged silvicultural system for which the main regeneration method is vegetative sprouting of either suckers (from the existing root systems of cut trees) or shoots (from cut stumps). This system is limited to hardwood species management. Due to the shade-intolerant nature of most of BC's commercial hardwood tree species, opening sizes for the coppice system are generally larger than one hectare.

34. What type of silviculture system? Involves removal of an entire stand of trees less than one hectare in size from an area. Each patch cut is managed as a distinct even-aged opening. If an area contains several patch cuts, each opening is still managed as a distinct opening. Regeneration is obtained either by artificial or natural regeneration, or a combination of the two.

35. What type of silviculture system? Means a silvicultural system that retains individual trees or groups of trees to: maintain structural diversity over the area of the cutblock for at least one rotation leave more than half the total area of the cutblock within one tree height from the base of a tree or group of trees, whether or not the tree or group of trees is inside the cutblock.

36. What are the three reasons to prune a tree?

37. What is the forestry term used for this dead tree which can support wildlife?