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Pacific Southwest Research Station
800 Buchanan Street
Albany, CA 94710-0011
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Title: Specific gravity variation in robusta eucalyptus grown in Hawaii
Author: Skolmen, Roger G.
Source: Res. Paper PSW-RP-78. Berkeley, CA: Pacific Southwest Forest & Range Experiment Station, Forest Service, U.S. Department of Agriculture; 7 p
Station ID: RP-PSW-078
Description: The specific gravity (air-dry volume, ovendry weight) of Eucalyptus robusta wood was tested within and between trees from 10 stands. Mean specific gravity was 0.603, but the range in individual samples for 50 trees was 0.331 to 0.869, and was 0.357 to 0.755 within one cross section. A consistent increase was recorded in all trees from pith to cambium and from butt to top. Mean for brittleheart (brash wood near the pith) was 0.503, considerably lower than that for normal wood at 0.651. Manufacturing problems caused by density variation could be reduced by sorting before sawing and during grading.
Key Words: Eucalyptus robusta, wood density, specific gravity, brittle-heart, variation, Hawaii
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Skolmen, Roger G. 1972. Specific gravity variation in robusta eucalyptus grown in Hawaii Res. Paper PSW-RP-78. Berkeley, CA: Pacific Southwest Forest & Range Experiment Station, Forest Service, U.S. Department of Agriculture; 7 p.
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