. Twenty-year growth of thinned and unthinned ponderosa pine in the Methow Valley of northern Washington. Figure 13.—The relation of annual volume increment to initial basal area. Each point on the figure represents the periodic volume increment relative to basal area for a plot at the beginning of the 5-year period. P HI UJ LL. O 03 o E o UJ S _l o >. + - THINNED PLOTS ONLY y = (l x)°6772 UNTHINNED AND THINNED PLOTS y = ( x)1 3178 I I 1 I 50 100 150 200 250 300 350 400 STAND-DENSITY INDEX Figure 14.—The relation of annual volume increment to initial sta
. Twenty-year growth of thinned and unthinned ponderosa pine in the Methow Valley of northern Washington. Figure 13.—The relation of annual volume increment to initial basal area. Each point on the figure represents the periodic volume increment relative to basal area for a plot at the beginning of the 5-year period. P HI UJ LL. O 03 o E o UJ S _l o >. + - THINNED PLOTS ONLY y = (l x)°6772 UNTHINNED AND THINNED PLOTS y = ( x)1 3178 I I 1 I 50 100 150 200 250 300 350 400 STAND-DENSITY INDEX Figure 14.—The relation of annual volume increment to initial stand-density index (Reineke 1933). Each point on the figure represents the periodic volume increment relative to the stand-density index of a plot at the beginning of the 5-year period. 11. 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 Barrett, James W. (James Willis), 1922- cn; Pacific Northwest Forest and Range Experiment Station (Portland, Or. ) cn. Portland, Or. : Pacific Northwest Forest and Range Experiment Station, U. S. Dept. of Agriculture, Forest Service
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