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16 Cards in this Set
- Front
- Back
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equation used for every merchantable year after the first
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(volume- previous yrs. volume)
--------------------------- years =MAI |
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rotation graph
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(from cut to cut is one rotation)
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equation for first merchantable year
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volume
----- years = MAI |
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where is residual volume located in rotation?
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-where next years volume is located
-in another stand, or trees left after area is cut |
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when are rotations used?
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-in even aged forests
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rotation of trees in AB
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douglas-fir: 60 yrs
lodgepole: 100 yrs white spruce: 100-120 yrs * it differs b/c different species are ripe at varying times |
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cutting cycle graph
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(you don't cut below this, to maintain your AAC)
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regulated forest
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=volume is identical across all age classes
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FMA
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=forest management agreement
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what is another way to manage the flow of volume, other than rotation?
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cutting cycle
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MAI
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=mean annual increment
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why do you take wood every rotation?
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-take to maintain sustained yield (evenness of flow)
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when are cutting cycles used?
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-in uneven aged stands or mixed species
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sustained yield
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=management of a forest property for the continuous production with the aim of achieving at the earliest practicable time an approximate balance between net growth (AAC) and harvest, either by annual or somewhat longer periods
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rotation
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=take the same amount of volume each year over the length of growing period (or rotation)
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reserve
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=stuff left behind after cut
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