. Development over 25 years of Douglas-fir, western hemlock, and western redcedar planted at various spacings on a very good site in British Columbia. Douglas fir British Columbia; Western hemlock British Columbia; Western redcedar British Columbia; Tree planting British Columbia. Douglas-fir ' Western hemlock "" Western redcedar Sitka spruce 16 14 » 12 k. 0) 5 10 6 8 6 0 / . \ / v A \ N. Spacing (meters) Figure 22—Average and height of Douglas-fir, western red- cedar, western hemlock, and Sitka spruce at age 20, by spacing, in Nelder-plot 2. Attained size
. Development over 25 years of Douglas-fir, western hemlock, and western redcedar planted at various spacings on a very good site in British Columbia. Douglas fir British Columbia; Western hemlock British Columbia; Western redcedar British Columbia; Tree planting British Columbia. Douglas-fir ' Western hemlock "" Western redcedar Sitka spruce 16 14 » 12 k. 0) 5 10 6 8 6 0 / . \ / v A \ N. Spacing (meters) Figure 22—Average and height of Douglas-fir, western red- cedar, western hemlock, and Sitka spruce at age 20, by spacing, in Nelder-plot 2. Attained size of the other three species, unlike Douglas-fir, at age 20 did not bear such a strong relation to planted spacing (fig. 22). The of hemlock tended to increase only slightly with increased spacing, and the variation around the trend was much greater than for Douglas-fir. Spruce and cedar both exhibited an irregular pattern relative to spac- ing, perhaps because of weevil damage and deer browsing. Growth of both species was apparently depressed by close spacing (arcs 1 -6), but it was little affected by spacing beyond arc 6 ( spacing). 39. 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 Reukema, Donald L; Smith, J. Harry G; Pacific Northwest Research Station (Portland, Or. ). [Portland, Or. ] : U. S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station
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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
