Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Laurence Mott; Les Groom; Stephen Shaler
    Date: 2002
    Source: Wood and Fiber Science, 34(2), 2002, pp. 221-237
    Publication Series: Miscellaneous Publication
    PDF: Download Publication  (11.1 MB)


    This paper reports variations in mechanical properties of individual southern pine fibers and compares engineering properties of earlywood and latewood tracheids with respect to tree height and juvenility. Results indicate that latewood fibers exhibit greater strength and stiffness than earlywood fibers irrespective of tree height or juvenility. Average earlywood loblolly pine fibers had modulus of elasticity and ultimate tensile stress values of 14.8 GPa and 604 MPa, respectively. Corresponding latewood fibers had modulus of elasticity and ultimate tensile stress values that were, respectively, 33 and 73% higher. These differences are attributable to microfibril angles and pitting. Juvenility as detined by the mechanical properties of individual wood fibers is not a cylindrical cone surrounding the pith but appears to be biconical, tapering from the base to below the live crown and then again from the live crown to the apex.

    Publication Notes

    • You may send email to to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.


    Mott, Laurence; Groom, Les; Shaler, Stephen. 2002. Mechanical Properties of Individual Southern Pine Fibers. Part II. Comparison of Earlywood and Latewood Fibers with Respect to Tree Height and Juvenility. Wood and Fiber Science, 34(2), 2002, pp. 221-237


    Loblolly pine, stiffness, strength, microtibril angle, modulus of elasticity, ultimate tensile stress, whole tree variation, juvenile wood

    Related Search

    XML: View XML
Show More
Show Fewer
Jump to Top of Page