Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Pierre Ackerman"'
Publikováno v:
Croatian Journal of Forest Engineering, Vol 41, Iss 2, Pp 1-12 (2020)
Accurate predictions in forest operations can be used towards effective planning, costing, and maximizing the productivity of machines in mechanised cut-to-length (CTL) harvesting. There is a general and substantial gap in forwarder productivity data
Externí odkaz:
https://doaj.org/article/82b7c007e21845d68bccd27adcf4f15a
Autor:
Pierre Ackerman, Chloe Williams
Publikováno v:
Croatian Journal of Forest Engineering, Vol 40, Iss 1, Pp 55-63 (2019)
A study was conducted in Pinus elliottii and Pinus patula clear-felling stands in the Southern Cape and Mpumulanga forestry regions of South Africa. A hybrid harvester was observed over four compartments in a cut-to-length system in order to assess i
Externí odkaz:
https://doaj.org/article/2770012d67c447c89fd89cfdb5df42f2
Publikováno v:
Annals of Forest Research, Vol 61, Iss 1, Pp 109-124 (2018)
Productivity of a mechanized P. patula cut-to-length harvesting operation was estimated and modelled using two methods of data collection: manual time study and follow-up study using StanForD stem files. The objective of the study was to compare the
Externí odkaz:
https://doaj.org/article/87ff66700d1c4d15ad81990354aebd16
Publikováno v:
Croatian Journal of Forest Engineering, Vol 39, Iss 1, Pp 1-13 (2018)
There has been a concerted shift from traditional motor-manual and semi-mechanised timber harvesting systems to mechanised cut-to length (CTL) operations in South Africa. This is particularly true in Eucalyptus pulpwood felling and processing, South
Externí odkaz:
https://doaj.org/article/d77155a5b26a48799990da9bff26a324
Publikováno v:
Croatian Journal of Forest Engineering, Vol 38, Iss 1, Pp 65-72 (2017)
Recent and increasing use of mechanized cut-to-length (CTL) operations in South Africa has been associated with greater diesel and lubricant requirements than was previously the case with motor-manual or semi-mechanized activities, placing a strain o
Externí odkaz:
https://doaj.org/article/799389519c1f484a9420c4f922175a27
Publikováno v:
Croatian Journal of Forest Engineering, Vol 37, Iss 2, Pp 297-307 (2016)
Chip moisture content and especially its uniformity impact kraft pulping. However, the effect of pulp log moisture content on chip quality during chip production is not well known. Chip size distribution is important in kraft pulping as it impacts ch
Externí odkaz:
https://doaj.org/article/0a757e83f5d04c4bb79f8dae52a51f81
Publikováno v:
Croatian Journal of Forest Engineering, Vol 37, Iss 1, Pp 201-217 (2016)
Different forest management regimes have different carbon footprints due to alternative operational strategies and options. Data concerning CO2 emissions (kg m–3) in felling, extraction, comminution and transport operations, performed under two dif
Externí odkaz:
https://doaj.org/article/4858b528c4354f09a110778b41339fd4
Publikováno v:
Croatian Journal of Forest Engineering, Vol 37, Iss 2, Pp 261-268 (2016)
This study quantifies the operational efficiency and cost of pre-choking main and tagline systems for tree-length extraction using a cable skidder. The study was done by comparing productivity and costs of the two systems in a semi-mechanised tree-le
Externí odkaz:
https://doaj.org/article/a7c347ff574a4e419c93f1e94bd7106a
Publikováno v:
International Journal of Forest Engineering. 33:56-65
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::573e9afbf46b62d95281db6ba4953106
https://doi.org/10.1080/14942119.2021.1978798
https://doi.org/10.1080/14942119.2021.1978798
Publikováno v:
International Journal of Forest Engineering. 32:191-201
Tree pruning is integral to sawtimber production in South Africa, the main purpose being the production of knot-free wood and access for fire protection. Although handheld pruning tools have been u...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::88168951d3e1b8bd75811a236dc71bd6
https://doi.org/10.1080/14942119.2021.1906568
https://doi.org/10.1080/14942119.2021.1906568