. CLIMACS : a computer model of forest stand development for western Oregon and Washington. Forests and forestry Oregon Data processing; Forests and forestry Washington (State) Data processing. mass of large trees are calculated indirectly. The sapwood-diameter equation for Pseudotsuga menziesii has been obtained by regression Foliage bio- mass can then be calculated from the foliage biomass-sapwood area ratio (Grier and Waring 1974) (fig. 5). To estimate the foliage biomass for large trees of other species, a multiplier is calculated from the ratio of the foliage biomass at 50 cm d
. CLIMACS : a computer model of forest stand development for western Oregon and Washington. Forests and forestry Oregon Data processing; Forests and forestry Washington (State) Data processing. mass of large trees are calculated indirectly. The sapwood-diameter equation for Pseudotsuga menziesii has been obtained by regression Foliage bio- mass can then be calculated from the foliage biomass-sapwood area ratio (Grier and Waring 1974) (fig. 5). To estimate the foliage biomass for large trees of other species, a multiplier is calculated from the ratio of the foliage biomass at 50 cm diameter of the species being considered to that of P. menziesii at 50 cm diam- eter. The multiplier is used to adjust the foliage biomass equations from Gholz and others (1979) for trees larger than 50 cm. ^Personal communication, R. H. Waring, School of Forestry, Oregon State University, Corvallis, Oregon. (/> (0 E o <D .55 o LL 125 U) J* 100 Foliage Biomass 1 1 1 ' 1 1 1 " Pseudotsuga menziesii 'OExp [ - 2 84 + In DBH (I)] r5 = 0 86 [256 * In DBH (i) - 639] * : fi = i. 100 200 250 Diameter (cm) Figure 5.—Foliage biomass as related to diameter for Pseudo- tsuga Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Dale, Virginia H; Hemstrom, Miles A; Pacific Northwest Forest and Range Experiment Station (Portland, Or. ). Portland, Or. : U. S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station
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