. Production rates in commercial thinning of young-growth Douglas- fir. Logging Costs; Douglas fir Thinning. Figure 18.—Direct skidding-cycle cost per thousand board feet (for distance = 400 feet), based on turn volume, by type of skidding 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 Adams, Thomas Cooper, 1918-; Pacific Northwest Forest and Range Experiment Station (Portland, Or. ). [Portland, Or. ] : Pacific N
. Production rates in commercial thinning of young-growth Douglas- fir. Logging Costs; Douglas fir Thinning. Figure 18.—Direct skidding-cycle cost per thousand board feet (for distance = 400 feet), based on turn volume, by type of skidding 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 Adams, Thomas Cooper, 1918-; Pacific Northwest Forest and Range Experiment Station (Portland, Or. ). [Portland, Or. ] : Pacific Northwest Forest and Range Experiment Station, Forest Service, U. S. Dept. of Agriculture
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