Effect of Rainfall and Elevation on Specific Gravity of Coast Douglas-Fir
AbstractAnalysis is made of the effects of five ranges of summer precipitation and three ranges of elevation on variation in specific gravity of Coast Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco). The average specific gravity of Coast Douglas fir wood formed during single growing seasons varied from 0.52 for dry summers to 0.45 for wet summers. The negative linear trend held for three elevational levels. Wood produced under a combination of dry summers at low elevations averaged 0.55 specific gravity, whereas wood produced during wet summers at high elevations averaged only 0.44 specific gravity. Both percentage of latewood and thickness of latewood tracheid wall followed trends that were similar to those of specific gravity with summer rainfall and elevation.
Carmean, W. H. 1954. Site quality for Douglas-fir in southwestern Washington and its relationship to precipitation, elevation, and physical soil properties. Soil Sci. Soc. Amer. Proc. 18(3): 330-334.nChalk, L. 1930. The formation of spring and summerwood in ash and Douglas-fir. Oxford Forestry Memoirs No. 10.nForest Service. 1965. Western wood density survey, Rep. No. 1, U.S.D.A. Forest Serv. Res. Paper FPL 27. Forest Prod. Lab., Madison, Wis.nHarris, J. M., and H. R. Orman. 1958. The physical and mechanical properties of New Zealand grown Douglas-fir. New Zealand Forest Serv. Tech. Paper No. 24. Forest Res. Inst., Wellington.nKennedy, R. W. 1961. Variation and periodicity of summerwood in some second-growth Douglas-fir. TAPPI 44(3): 161-166.nKlauditz, W., and I. Stolley. 1957. Untersuchungen über das Holz von Douglasien verschiedener Standorte in Niedersachsen. Aus dem Walde, Hannover 1: 51-73.nKnigge, W. 1962. Untersuchungen über die Abhängigkeit der mittleren Rohdichte nordamerikanischer Douglasienstämme von unterschiedlichen Wuchsbedingungen. Holz als Roh- und Werkstoff 20(9): 352-360.nMcArdle, R. E., and W. H. Meyer. 1930. The yield of Douglas-fir in the Pacific Northwest. U.S.D.A. Tech. Bull. No. 201.nMcMinn, R. G. 1960. Water relations and forest distribution in the Douglas-fir region on Vancouver Island. Can. Dep. Agr. Publ. 1091, Ottawa, Ont.nMork, E. 1928. Die Qualität des Fichtenholzes unter besonderer Rüchsichtnahme auf Schleif-und Papierholz. Papier Fabrikant 26(48): 741-747.nSmith, D. M. 1965. Rapid measurement of tracheid cross-sectional dimensions of conifers: its application to specific gravity determinations. Forest Prod. J. 15(8): 325-334.nSnodgrass, J. D., and A. F. Noskowiak. 1968. Strength and related properties of Douglas-fir from mill samples. Forest Res. Lab., Oreg. State Univ., Bull. No. 10. Corvallis.nSpurr, S. H. 1961. Observations on Douglas-fir in New Zealand. New Zealand Forest Serv. Tech. Paper No. 38, Forest Res. Inst., Wellington.nU.S. Department of Commerce, Weather Bureau. 1956-1964. Climatological data. June-September, Washington, Vols. 60-68, Nos. 6 through 9.nU.S. Department of Commerce, Weather Bureau. 1956-1964. Climatological data. June-September, Oregon, Vols. 62-70, Nos. 6 through 9.nU.S. Forest Products Laboratory. 1955. Wood handbook. U.S. Dep. Agr., Agr. Handbook 72.nWhitmore, F. W., and R. Zahner. 1966. Development of xylem ring in stems of young red pine trees. Forest Sci. 12(2): 198-210.nWolter, K. E. 1968. A new method for marking xylem growth. Forest Sci. 14(1): 102-104.nZahner, R. 1963. Internal moisture stress and wood formation in conifers. Forest Prod. J. 13(6): 240-247.nZahner, R., and A. R. Stage. 1966. A procedure for calculating daily moisture stress and its utility in regressions of tree growth on weather. Ecology 47(1): 64-74.n
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