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A Madill 122 yarding crane was monitored over a two-month period in 1987 in a coastal B.C. second-growth stand. Productivity, costs, and profitability were determined. Although productivity and costs averaged 34.7 m3 per productive machine hour and $5.68/m3 respectively, marginal economics analysis showed 24-46% of J-grade logs, 77-85% of X-grade logs, and 100% of Y-grade logs were yarded at a loss. The main factor influencing yarding profit was turn volume with yarding distance having a lesser effect.
Macdonald, J.. 1987. Productivity and Profitability of Grapple Yarding B.C. Coastal Second-growth Timber. British Columbia Ministry of Forests, Lands, Natural Resource Operations and Rural Development. FRDA Research Report. FRR15
Topic: FLNRORD Research Program
Keywords: Equipment
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