Productivity and profitability of grapple yarding bunched B.C. coastal second-growth timber

Productivity and profitability of grapple yarding bunched B.C. coastal second-growth timber by MacDonald, A. J. Download PDF EPUB FB2

Productivity and profitability of grapple yarding bunched B.C. coastal second-growth timber. FERIC Special Report SR Machinery studied: • Washington A yarding crane with mobile backspar. • Three different grapple Author: W. Jukes. Two Madill yarding cranes were monitored over a 3-week period in in a stand, predominantly of Douglas fir [Pseudotsuga menziesii], where chokers were used for yarding mechanically felled and bunched second-growth timber.

Productivity, costs and profitability of the choker system were determined and compared with use of grapple systems on the same yarding Cited by: 2. Productivity, costs, and profitability were determined. Shift-level analysis showed skidding costs of $ and $/m3 for the two rubber-tired skidders and $/m3 for the D4H Custom skidder.

Analysis of. However, falling productivity was reduced by only % in the 70% retention unit, compared to the clearcut, mainly because of a marked difference in timber type between this unit and the clearcut. Cable yarding Cited by: 2. Grapple yarding systems are intermediate between skyline and high lead or jammers, as they combine features of each.

Balloon yarding is substantially less severe than skyline yarding. Helicopter yarding. This banner text can have markup. web; books; video; audio; software; images; Toggle navigation. The timber stands on these reservations and on the Public Domain allotments is second growth that occurred following logging.

Although some tracts have been logged, the majority of the stands have. Coastal licensees are allowed a benchmark waste limit of 10 cubic metres per hectare for immature timber and 35 for mature timber.

Waste is further classed as avoidable or unavoidable. 2 Harvesting Systems and Equipment in British Columbia PART 2: REFERENCE PRIMARY TRANSPORT EQUIPMENT Part 2 Page The handbook does not attempt to define a single best.

Grapple yardinr systems are intermediate between skyline and high-lead or jammers, as they combine features of each. Balloon yarding is substantially less severe than skyline yarding. Helicopter yarding.

The timber was transported by a Volvo FH timber truck comprised of a three-axle tractor and a fouraxle trailer equipped with solid side panels and bottom and inside moving carriage (Fig. Organ Harvesting and Transplants. ERIC Educational Resources Information Center.

Baskette, Kimberly G.; Ritz, John M. Humans and animals need healthy organs to live. All stands contained second growth Douglas-fir and were of similar age class ( years). The characteristics of each site under study are shown in Acuna and Murphy (in press).

After felling, disks .