. Production rates in commercial thinning of young-growth Douglas- fir. Logging Costs; Douglas fir Thinning. Skidding Time Skidding times per turn (fig. 8) for the three types of skidding equipment were: (11) 65-hp. crawler Y = + ]D + R2 = ** (12) 50-hp. crawler, cubic feet Y = + + , - (y,)2 + R2 = ** (13) 60-hp. four-wheel skidder, cubic feet Y = - + £> - + , + R2 = ** (14) 50-hp. crawler, board feet Y = — + ]62D + + R2


. Production rates in commercial thinning of young-growth Douglas- fir. Logging Costs; Douglas fir Thinning. Skidding Time Skidding times per turn (fig. 8) for the three types of skidding equipment were: (11) 65-hp. crawler Y = + ]D + R2 = ** (12) 50-hp. crawler, cubic feet Y = + + , - (y,)2 + R2 = ** (13) 60-hp. four-wheel skidder, cubic feet Y = - + £> - + , + R2 = ** (14) 50-hp. crawler, board feet Y = — + ]62D + + R2 = ** 115) 60-hp. four-wheel skidder, board feet Y = + - £>2 + ^ + R2 = ** 7. 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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