Strength and Related Properties of Bishop Pine II. Properties of Juvenile Wood from Young Stems of Various Provenances

Authors

  • Arno P. Schniewind
  • Barry Gammon

Keywords:

Bishop pine, Monterey pine, Pinus muricata, Pinus radiata, chemical composition, fibril angle, fiber length, bending strength, modulus of elasticity, compression strength, specific gravity, provenance

Abstract

Thinnings from a provenance trial of Bishop pine, including some Monterey pine, planted in 1969, were taken in 1974 (17 stems) and 1982 (8 stems). Specific gravity and strength properties of the thinnings were lower than juvenile wood of mature trees tested previously. This could be attributed to very large fibril angles (over 40 degrees) which were found in both Bishop and Monterey pine. These morphological features in turn are thought to be the consequence of site conditions, such as the close proximity to the ocean. There appeared to be no major differences between the four races of Bishop pine, namely Southern Bishop, Central Bishop, Northern Bishop, and Island pine. Southern Bishop appeared to be least strong and Northern Bishop highest in strength, but the replications in these races were few.

References

American Society for Testing and Materials. 1974. Annual book of ASTM standards. ASTM, Philadelphia.nCockrell, R. A. 1959. Mechanical properties of California-grown Monterey pine. Hilgardia 28(8):227-238.nLeney, L. 1981. A technique for measuring fibril angle using polarized light. Wood Fiber 13(1):13-16.nPanshin, A. J., and C. de Zeeuw. 1980. Textbook of wood technology. 4th ed. McGraw-Hill, New York.nPassof, P. 1974. Private communication.nPearson, R. G., and R. C. Gilmore. 1971. Characterization of the strength of juvenile wood of loblolly pine (Pinus taeda L.). For. Prod. J. 21(1):23-31.nPearson, R. G., and R. C. Gilmore. and B. E. Ross. 1984. Growth rate and bending properties of selected loblolly pines. Wood Fiber Sci. 16(1):37-47.nSchniewind, A. P., and B. Gammon. 1980. Strength and related properties of Bishop pine. I. Strength of "blue race" Bishop pine from three locations. Wood and Fiber 12(2): 131-141.nShelbourne, C. J. A. 1974. Recent investigations of wood properties and growth performance in Pinus muricata. New Zealand J. Forestry 19(1): 13-45.nTalbert, J. T., J. B. Jett, and R. L. Bryant. 1983. Inheritance of wood specific gravity in an unimproved loblolly pine plantation: 20 years of results. Silvae Genetica (as cited by Pearson and Ross 1984).nZobel, B. J., R. C. Kellison, M. F. Matthias, and A. V. Hatcher. 1972. Wood density of the southern pines. N. Carolina Agric. Exp. Sta., Raleigh, Tech. Bull. No. 208.n

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Published

2007-06-28

Issue

Number 3 / July 1986

Section

Research Contributions

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