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Productivity of harvesting and clearing of brushwood alongside forest roads

Laitila, Juha; Väätäinen, Kari (2020)

 
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Laitila_et_al_2020.pdf (3.850Mt)
Lataukset 


Laitila, Juha
Väätäinen, Kari

Julkaisusarja
Silva Fennica

Volyymi
54

Numero
5

Sivut
21 p.


The Finnish Society of Forest Science
2020
doi:10.14214/sf.10379
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Julkaisun pysyvä osoite on
http://urn.fi/URN:NBN:fi-fe2020101584117
Tiivistelmä
Expertise in the cost-efficient utilization and treatment of brushwood on forest roadside sites is limited. In the present study, the productivity of brushwood clearing and harvesting on forest roadside sites was defined by creating time-consumption models or parameters for the aforementioned working methods. Compiled time consumption models and parameters for the brushwood clearing and harvesting can be used as a basis for evaluating alternative management practices and to determine when brushwood biomass should be harvested and when it should be left to decay. The harvesting of brushwood was based on the harwarder system and the clearing of brushwood was done with a spiral cutter, which is a novel accessory for cutting roadside vegetation. Based on the study results, the average volume of harvested brushwood and forwarding distance are the key elements that have an effect on harvesting productivity with harwarders. Correspondingly, stump diameter has a strong impact on the clearing productivity of brushwood. The plot-wise productivity of the spiral cutter in brushwood clearings varied in the range of 0.19–0.61 ha per PMh. An increase in stump diameter slowed down the clearing productivity of the spiral cutter and there was a clear step downward in clearing productivity as the average diameter increased from 30 mm to 40 mm. The machinery under study operated well and there were no interruptions due to machine breakdowns.
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