Silviculture - University of Montana - Exam 1
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| What are three different reproduction harvest methods in even-aged management systems. | Clearcut, Seed tree, shelterwood.
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| Site index | Height of a tree at a specified index or base age. Used as an indicator of site quality.
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| 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.
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| Forest stands that contain more than one overstory tree species are referred to as | mixed age
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| and stands that contain at least three different age classes are referred to as | multi-aged stands
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| Single species even-aged stands typically have a diameter distribution that can be described as | bell shaped
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| Herbage, browse, cover, and soft mast are in greatest abundance for most wildlife species during during what stage of stand development? | initiation
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| 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
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| What stage of stand development would most thinning be expected to occur in? | stem exclusion
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| 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
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| 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
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| 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
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| 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
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| Reverse-J diameter distributions of mixed species stands clearly indicate a balanced uneven-aged stand. | False
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| 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
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| 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.
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