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Article

Exploring the Use of Harvesters in Large-Diameter Hardwood-Dominated Stands

Department of Ecology and Ecosystem Management, Technical University of Munich, Hans-Carl-von-Carlowitz-Platz 2, 85354 Freising, Germany
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Forests 2018, 9(7), 424; https://doi.org/10.3390/f9070424
Received: 21 June 2018 / Revised: 6 July 2018 / Accepted: 11 July 2018 / Published: 15 July 2018
(This article belongs to the Section Forest Ecology and Management)
The use of fully-mechanized operations, normally targeted at coniferous species, has also been on the rise in mixed-species and continuous-cover forests comprised of a strong share of deciduous species. With special form characteristics (complex crowns, large-diameter branches, forks and sweeps, high wood density, etc.), deciduous trees can lead to wide-ranging harvesting productivities, often divergent from those originally derived from coniferous species. Due to the importance and growing interest in mechanizing operations in close-to-nature mixedwood and deciduous stands, obtaining insight on harvesting productivity in large-diameter deciduous trees was of interest. This study located in Bavaria, Germany, monitored four harvesters (two wheeled and two tracked machines) operated in four distinct harvest blocks (case studies), all of which had a high percentage of large-diameter European beech and oak trees. Harvesting productivity and volume recovery was assessed and quantified. Based on the field inventory of European beech and oak trees and continuous time-and-motion study, average harvesting productivity ranged from 29 to 43 m3/PMH0 (productive machine hours without delay), whereas volume recovery fluctuated between 73% and 85% for trees that were completely felled and processed by machines. Because of the rather limited sample size and the variable conditions between case studies, results should only be used as general orientation on the performance of the tested machines and additional research is suggested to further understand the influence of tree form characteristics on impediments to mechanized processing. View Full-Text
Keywords: harvesting productivity; mechanized operations; wheeled and tracked harvesters; processing; volume recovery; work technique; time-and-motion study; deciduous species harvesting productivity; mechanized operations; wheeled and tracked harvesters; processing; volume recovery; work technique; time-and-motion study; deciduous species
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MDPI and ACS Style

Labelle, E.R.; Breinig, L.; Sycheva, E. Exploring the Use of Harvesters in Large-Diameter Hardwood-Dominated Stands. Forests 2018, 9, 424. https://doi.org/10.3390/f9070424

AMA Style

Labelle ER, Breinig L, Sycheva E. Exploring the Use of Harvesters in Large-Diameter Hardwood-Dominated Stands. Forests. 2018; 9(7):424. https://doi.org/10.3390/f9070424

Chicago/Turabian Style

Labelle, Eric R., Lorenz Breinig, and Ekaterina Sycheva. 2018. "Exploring the Use of Harvesters in Large-Diameter Hardwood-Dominated Stands" Forests 9, no. 7: 424. https://doi.org/10.3390/f9070424

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