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Reloading mechanized tree planting devices faster using a seedling tray carousel

Ersson, Back Tomas and Bergsten, Urban and Lindroos, Ola (2014). Reloading mechanized tree planting devices faster using a seedling tray carousel. Silva Fennica. 48 :2 , 14
[Research article]

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Official URL: http://dx.doi.org/10.14214/sf.1064


On Nordic clearcuts, today’s tree planting machines produce high-quality but costly regenerations. Much of this high cost is attributable to the planting machines’ low productivity. One promising way of raising productivity is to lessen the time spent manually reloading seedlings onto the carousels of crane-mounted planting devices. Using MagMat, a carousel test-rig designed by engineering students, we studied how much faster tray-wise seedling reloading is on the Bracke Planter compared to reloading with today’s seedling-wise-loaded carousel. The MagMat test-rig held eight Hiko cultivation trays from which seedlings were deplugged individually and dropped into the planting tube. The time study confirmed that seedling reloading was on average twice as fast with MagMat compared to today’s seedling carousel, thereby increasing assumed planting machine productivity by 8-9% depending on the planting device used. MagMat’s cost-efficiency was analysed to be particularly reliant on its added investment cost, mechanical availability and how quickly trays can be switched automatically. Nevertheless, MagMat’s field performance illustrated the overall potential of tray-wise loading compared to piecewise seedling loading for increasing the productivity of crane-mounted planting devices. Also, deplugging proved to be a reliable method of extracting seedlings from the rigid, copper-painted Hiko cultivation trays even when performed at the excavator’s boom-tip during mounding work. We conclude that, rather than piecewise seedling loading, tray-wise loading combined with deplugging seedlings from suitable cultivation trays is a reliable and much more time-efficient method to feed seedlings on probably any type of tree planting machine.

Authors/Creators:Ersson, Back Tomas and Bergsten, Urban and Lindroos, Ola
Title:Reloading mechanized tree planting devices faster using a seedling tray carousel
Series Name/Journal:Silva Fennica
Year of publishing :2014
Page range:14
Publisher:The Finnish Society of Forest Science, The Finnish Forest Research Institute
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Agris subject categories.:K Forestry > K01 Forestry - General aspects
K Forestry > K11 Forest engineering
Subjects:(A) Swedish standard research categories 2011 > 2 Engineering and Technology > 203 Mechanical Engineering > Applied Mechanics
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Keywords:tree planting machine, containerized seedling, seedling feed, time study, cost analysis, productivity, silviculture
Permanent URL:
Alternative URL:http://www.silvafennica.fi/article/1064
ID Code:11057
Faculty:S - Faculty of Forest Sciences
Department:(S) > Department of Forest Biomaterials and Technology (from 131204)
Deposited By: Back Tomas Ersson
Deposited On:18 Mar 2014 10:20
Metadata Last Modified:03 Jan 2015 03:58

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