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This function computes the volume of a tree bole given its basal diameter and length, assuming that the bole is a frustum of a geometric solid.
vol.m3(dbh.cm, height.m, multiplier = 0.5)
The volume is returned, in units of cubic metres.
basal diameter in cm.
height in m.
shape, expressed as a multiplier.
Commonly-used shapes are:
conoid
second-degree parabaloid
cylinder
vol.m3(30, 30) vol.m3(30, 30, 1)
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