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12 Cards in this Set
- Front
- Back
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how to calculate basal area
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BA= (3.14 pie) r 2
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initial floristics
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=species are already established
(weeds, shrubs, trees all present) |
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how to calculate volume
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V= 1/2 X (Ab + Au) X L
divided by 10 000 |
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relay floristics
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=distinct different species coming in at a time
(weeds-then shrubs-then trees) |
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dbh
Ht DSH Ab Au V |
dbh= diameter breast height
Ht= height DSH= diameter stump height Ab= basal area at stump Au= basal area at tree top V= log volume |
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aerial photographs
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-serve as a basis for making decisions in the forest
-used in forest management |
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perimeter of a circle
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=is less than a square
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fixed (area)
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-mark out section of a hectare, don't use entire hectare
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3 ways to calculate height?
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a. clinometer instrument
b. abney instrument c. builtmoor stick |
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3 ways to take diameter measurement
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a. with calipur
b. diameter tape c. builtmoor, meter stick |
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2 ways to calculate volume of wood in an area
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1. fixed plot system
2. variable plot system |
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variable plot method
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sum of all "in" trees + 1/2 of borderline trees X BAF = basal area/hectare m2
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