Estimating Size of the Fibril Angle in Late Wood Tracheids of Slash Pine
Abstract:The multiple correlation analysis was made to determine which one of nine independent variables would give the best estimate of the fibril angle within a disk or increment core. For the study, twelve second-growth, 20-22 year old slash pine were selected at the Olustee Experimental Forest, Florida. Of these, the second and third, ninth and tenth, and seventeenth and eighteenth annual growth rings from the pith at breast height were sampled for the determination of the fibril angle and nine independent variables including cell wall thickness, radial tracheid width, tracheid length, percentage of late wood, ring width, age, and distance from the pith in inches. All of the best single variable regressions, involving 1 to 9 variables, proved to be significant in that they accounted for 80 to 88 percent of the total amount of variation in fibril angle.
Document Type: Journal Article
Affiliations: Technologist in the Division of Wood Quality, Forest Products Laboratory, Forest Service, U. S. Dept. Agric., Madison, Wis., maintained in cooperation with the University of Wisconsin
Publication date: April 1, 1964
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