. Growth and soil moisture in thinned lodgepole pine. Trees Growth; Soil moisture; Lodgepole pine. (HIGHEST) 3 4. 105 65 1|0 5 0 5 1|0 5 0 5 l|0 5 0 5 1|0 5 0 5 10 CROWN WIDTH (FEET) Figure size of 100 largest trees per acre in 1959 and 1969 by density treat- ment. Crown widths for 1959 were estimated from 1969 regressions of crown width on diameter, 1959 crowns are shown as dotted lines. Crown width increased steadily as tree diameter increased across the entire range of diameters. Regressions of crown width on stem diameter breast high within each of the density levels were all high
. Growth and soil moisture in thinned lodgepole pine. Trees Growth; Soil moisture; Lodgepole pine. (HIGHEST) 3 4. 105 65 1|0 5 0 5 1|0 5 0 5 l|0 5 0 5 1|0 5 0 5 10 CROWN WIDTH (FEET) Figure size of 100 largest trees per acre in 1959 and 1969 by density treat- ment. Crown widths for 1959 were estimated from 1969 regressions of crown width on diameter, 1959 crowns are shown as dotted lines. Crown width increased steadily as tree diameter increased across the entire range of diameters. Regressions of crown width on stem diameter breast high within each of the density levels were all highly significant in a statistical sense. However, differences in slope of regressions between density levels were small and did not approach statistical significance. Crowns also tended to be wider at comparable diameters for trees growing at the lower densities. Following is a comparison of crown widths among density levels before and after adjustment for diameter diffe rence s: Growing - Average Average Adjusted stock diameter orown width crown width level (Inches) (Feet) (Feet) Spacing—'' (lowest) 1 2 3 4 5 (highest) 6Crown width adjusted to a tree diameter of inches, the average diameter of the 305 trees on which crown width was measured. 7The spacing plots were the ones selected later in the less dense portions of the original stand. They could not be included in figure 6 because no 1959 information was 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 Dahms, Walter G. cn; Pacific Northwest Forest and Range Experiment Station (Portland, Or. ). Portland, Or. : Pacific Northwest Forest and Range Experiment Station, U. S. Dept. of Agriculture
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Keywords: ., bookcentury1900, bookcollectionbiodiver, booksubjectsoilmoisture
