. Growth and mortality of ponderosa pine poles thinned to various densities in the Blue Mountains of Oregon. Ponderosa pine, Thinning, Blue Mountains (Or. and Wash. ); Ponderosa pine, Blue Mountains (Or. and Wash. ), Growth; Mountain pine beetle, Blue Mountains (Or. and Wash. ); Forest health, Blue Mountains (Or. and Wash. ). Stand age (yr) Figure 16—Cubic volume MAIs (adjusted means) for each GSL as a function of total stand age. Growth of the 30 Largest Trees Per Acre Regressions for Gross PAIs 100 80 60 "D XI _ 40 - < "5 O 20. 55 60 65 70 85 Stand age (yr) Figure 17—Board foot
. Growth and mortality of ponderosa pine poles thinned to various densities in the Blue Mountains of Oregon. Ponderosa pine, Thinning, Blue Mountains (Or. and Wash. ); Ponderosa pine, Blue Mountains (Or. and Wash. ), Growth; Mountain pine beetle, Blue Mountains (Or. and Wash. ); Forest health, Blue Mountains (Or. and Wash. ). Stand age (yr) Figure 16—Cubic volume MAIs (adjusted means) for each GSL as a function of total stand age. Growth of the 30 Largest Trees Per Acre Regressions for Gross PAIs 100 80 60 "D XI _ 40 - < "5 O 20. 55 60 65 70 85 Stand age (yr) Figure 17—Board foot MAIs (adjusted means) for each GSL as a function of total stand age. For the 24-year study, mean annual basal area growth of the 30 surviving trees with the largest diameters in spring 1968 decreased curvilinearly (p < ) with increasing GSL (table 8, fig. 18). Mean annual cubic volume growth of these 30 largest trees decreased linearly (p < ) with increasing GSL (table 8, fig. 19). The relation between gross PAIs for both basal area (fig. 20) and cubic volume (fig. 21) and SDI obtained by fitting equation (9) is clearly curvilinear within the range of SDIs examined. The regressions were performed to illustrate the functional relation between PAIs and the independent variables SDI, site index, and age. The regression analyses results (table 9) do not reflect the correct R2s and probability levels because of the dependencies due to blocking and periods. 20. 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 Cochran, P. H; Barrett, James W. (James Willis), 1922-; Pacific Northwest Research Station (Portland, Or. ). Portland, Or. (333 S. W. First Ave. , P. O. Box 3890, Portland 97208-3890) : U. S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station
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