. Veneer recovery from second-growth Douglas-fir. Veneers and veneering; Douglas fir. 10 15 20 25 DIAMETER (INCHES) Figure 9.—Cubic volume of log compo- nents as a percent of log cubic volume over scaling diameter. PERCENT 100 r 30 80 70 BO 50 40 30 20 10. I 10 15 20 25 DIAMETER (INCHES) 30 Figure 10.—Cumulative cubic volume of log components as a percent of log cubic volume. RECOVERY BY STAND Stand conditions and veneer recovery.— Originally, the sample was set up to test whether there was any difference in yield between thinned and unthinned stands, or between the fast- growing, lightly-stoc
. Veneer recovery from second-growth Douglas-fir. Veneers and veneering; Douglas fir. 10 15 20 25 DIAMETER (INCHES) Figure 9.—Cubic volume of log compo- nents as a percent of log cubic volume over scaling diameter. PERCENT 100 r 30 80 70 BO 50 40 30 20 10. I 10 15 20 25 DIAMETER (INCHES) 30 Figure 10.—Cumulative cubic volume of log components as a percent of log cubic volume. RECOVERY BY STAND Stand conditions and veneer recovery.— Originally, the sample was set up to test whether there was any difference in yield between thinned and unthinned stands, or between the fast- growing, lightly-stocked stands and those with moderate to slow growth rates. The fact that the two peeling thick- nesses were different in both recovery ratio and grade complicates this compari- son. Almost all of the timber from the thinned stands was peeled into 1/10-inch veneer. A large majority of the timber from stands with either slow or moderate early-growth rates was peeled into 1/6- inch veneer. Veneer from thinned and unthinned stands.— Linear regression analyses were run on the grade No. 2 Sawmill blocks peeled 1/10-inch from thinned and unthinned stands. Dependent variables were: 1. Recovery ratio: square feet veneer (3/8-inch basis) per board feet (Scribner scale). 2. Cubic volume of veneer as a percent of block cubic volume. 3. Cubic volume of reject as a percent of block cubic volume. 4. Cubic volume of veneer and reject as a percent of block cubic volume with diameter as the independent variable. Analysis of covariance determined that there was no statistically significant difference between the blocks from thinned and unthinned stands in any of these tests. Fast-growing and slow-growing timber. —The same analyses were run on the lightly stocked and moderately or densely stocked stands, with all of the blocks peeled into 1/6-inch veneer. Again, 13. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability -
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Keywords: ., bookcentury1900, bookcollectionbiodiversi, booksubjectdouglasfir
