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SILVTEST1

Silviculture - University of Montana - Exam 1

QuestionAnswer
What are three different reproduction harvest methods in even-aged management systems. Clearcut, Seed tree, shelterwood.
Site index Height of a tree at a specified index or base age. Used as an indicator of site quality.
The Kraft crown classification scheme is best suited for what kind of stands in terms of age structure and species composition? even aged stands advanced stem exclusion.
Forest stands that contain more than one overstory tree species are referred to as mixed age
and stands that contain at least three different age classes are referred to as multi-aged stands
Single species even-aged stands typically have a diameter distribution that can be described as bell shaped
Herbage, browse, cover, and soft mast are in greatest abundance for most wildlife species during during what stage of stand development? initiation
Cavities dead trees, hard mast, and a different set of insect species (especially wood decomposers) occur most abundantly in what stage of stand development? old growth
What stage of stand development would most thinning be expected to occur in? stem exclusion
One easily obtainable measure of tree vigor, which is calculated as the length of the living crown by total height of the tree is refered to as the live crown ratio
In interpreting diameter distributions, it is usually helpful to combine all species together, in order to get the clearest picture of age structure and past disturbance. False
Following a major disturbance or harvest treatment, advanced regeneration that might have a range of "chronological ages" can all be considered to have the same "effective age" (upon release from overstory), and will be referred to as a single cohort. True
In lower elevations around Missoula, southern aspects will tend to have greater composition of western larch then northerly aspects because they receive greater amounts of solar radiation. True
Reverse-J diameter distributions of mixed species stands clearly indicate a balanced uneven-aged stand. False
In response to commercial thinning, lower branches of residual trees will tend to die (self-prune) at a faster rate in response to the increased growing space, thereby reducing live-crown ratios of the trees. False
List and explain four characteristics of a forest stand that a silviculturist may try to control or enhance... Canopy closure, understory growth through retention, species composition, the successional phase.
Created by: JGILL40167
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