33
Commentary on Species
Adjustment Tables
In 1992, a study was conducted at the
Forest Research Laboratory of Oregon
State University on species correction
for the Wagner Hand-Held Moisture
Meters. The species tested were Douglas
Fir, Lodgepole Pine, Western Red Cedar,
Western Hemlock, White Fir, Western
Larch, Engelmann Spruce, and White
Oak. Three to four 40-piece samples of
each species were tested. Specic gravity
was found to be the primary factor on
species adjustment. A species equation
as a function of specic gravity and
the meter reading was obtained using
multiple-regression technique
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