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Multi-product forwarder based softwood timber extraction: Time consumption and productivity analysis of two forwarder models over multiple products and extraction distance

Multi-product forwarder based softwood timber extraction: Time consumption and productivity analysis of two forwarder models over multiple products and extraction distance

by Ben Spong | Nov 12, 2019 | News, Technical Notes

This study continues to build upon the database of average time consumption and productivity models of forwarder machines in mechanised CTL operations in South African pine sawtimber plantations. The aim of this study was to calculate the time consumption,...
A comparison of two methods of data collection for modelling productivity of harvesters: manual time study and follow-up study using on-board-computer stem records

A comparison of two methods of data collection for modelling productivity of harvesters: manual time study and follow-up study using on-board-computer stem records

by Ben Spong | Nov 12, 2019 | News, Technical Notes

This study explored the relationship between the productivity produced using two methods of data collection: Time Study – manual Time Study following the Standards for Time Studies for the South African Forest Industry and Stem File – using the machine...
Skills development of mechanised softwood sawtimber cut-to-length harvester operators on the Highveld of South Africa

Skills development of mechanised softwood sawtimber cut-to-length harvester operators on the Highveld of South Africa

by Ben Spong | Nov 12, 2019 | News, Technical Notes

In this study, a South African pine saw-timber mechanised cut-to-length harvesting operation was analysed with the main objective of describing and modelling productivity development learning curves of beginner operators in both clear-felling and thinning operations....
Diesel consumption and the carbon balance in South African pine clear-felling CTL operations: a preliminary case study

Diesel consumption and the carbon balance in South African pine clear-felling CTL operations: a preliminary case study

by Marius Terblanche | Nov 12, 2019 | News, Technical Notes

This study aims to determine the carbon balance of South African plantations by assessing the emissions associated with mechanised CTL harvesting and comparing these to the carbon stored in the logs harvested. The objectives are as follows:   Estimate diesel and...
Cost-productivity analysis of South African pine sawtimber mechanised cut-to-length harvesting

Cost-productivity analysis of South African pine sawtimber mechanised cut-to-length harvesting

by Ben Spong | Nov 12, 2019 | News, Technical Notes

A time study of a mechanised cut-to-length system was conducted in Pinus elliottii sawtimber plantations in the Southern Cape forestry region of South Africa. A harvester and a forwarder were studied with the objectives of finding average productivity across the work...
Effect of slope on productivity and cost of Eucalyptus pulpwood harvesting using purpose-built and excavator-based machines

Effect of slope on productivity and cost of Eucalyptus pulpwood harvesting using purpose-built and excavator-based machines

by Marius Terblanche | Aug 27, 2019 | News, Technical Notes

This study sets out to see if the slope can affect mechanized cut-to-length harvester operations’ productivity and harvesting cost. To test this assumption, two different harvesters were applied to the study: an excavator-based machine (EBM) (Volvo EC210BF) and a...
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