Caption: FIGURE 1: Volume yield
of BMA from different bone marrow sites (n = 5); *** p <0.001.
The volume yield
of large sugi logs tends to be high in sawing patterns producing large dimension lumber such as flat square.
Optimal positioning can be defined in basic terms as the means of placing and handling a log during the sawing process in order to maximize the volume yield
. In a typical Swedish sawmill, this procedure involves log rotation (horns-down), centering the log face to the saw blades and, when curve sawing is applied, calculating and controlling the log through the second sawing machine according to a predicted optimal kerf line (Maness and Stuart 1994, Selin 2001).
[Y.sub.volume] = log volume yield
([m.sup.3] sawn boards/[m.sup.3] log),
Not surprisingly, the recovery values (volume yield
) obtained from computer-simulated sawing were higher (on average 5% to 6%) than those obtained from the actual sawing of the sample sawlogs.
Cull container parts were counted but not included in the volume yield
. This process was repeated for each log group.
Without such price deduction, it is likely that most logs will be cut to minimum length due to log taper and volume yield
[V.sub.ijkl] = the lth tree-stem of value or volume yield
under the ith species group, the jth bucking method, and kth butt diameter class,
The annual rate of increase in volume yield
is about 0.96 MBF as reflected by the coefficient of X in Equation .
Cubic-foot recovery percentage by species was used as a measure of wood volume yield
from logs to lumber.
The total expected value of tested and graded dimension lumber yield per acre of plantation stand of a given age was calculated by multiplying the average unit value ($/MBF) of the tested dimension lumber to the estimated total dimension lumber volume yield
(MBF) per acre.
For example, it was found that a 6 percent increase in lumber volume yield
would result in a net revenue increase of about 20.2 percent.