Current issue: 58(1)

Under compilation: 58(2)

Scopus CiteScore 2021: 2.8
Scopus ranking of open access forestry journals: 8th
PlanS compliant
Silva Fennica 1926-1997
1990-1997
1980-1989
1970-1979
1960-1969
Acta Forestalia Fennica
1953-1968
1933-1952
1913-1932

Articles containing the keyword 'maintenance'

Category : Article

article id 5380, category Article
Arto Rummukainen. (1989). Moreenimurskeella pinnoitettujen metsäteiden kunnossapito maataloustraktorikalustolla. Silva Fennica vol. 23 no. 2 article id 5380. https://doi.org/10.14214/sf.a15537
English title: Maintenance of crushed moraine paved forest roads with agricultural tractor implements.
Original keywords: metsätiet; kunnossapito; maataloustraktori; moreenimursketiet; hydraulinen tärytin; lana
English keywords: maintenance; forest roads; tractors; implements; grain-size distribution; vibrating blade; pulled drag
Abstract | View details | Full text in PDF | Author Info

The condition of forest road pavements was studied in spring, one week after maintenance and in autumn. The effect of vibrating blade was slightly better than that of pulled drag. Large loose stones couldn’t be pressed into pavement with either of the implements. The use of the vibrating blade was three times as expensive as the use of the pulled drag, however, the blade is suitable for other purposes as well.

The PDF includes an abstract in Finnish.

  • Rummukainen, E-mail: ar@mm.unknown (email)
article id 5186, category Article
Kaarlo Rieppo, Seppo Väyrynen. (1983). Kuormatraktoreiden huolto-ominaisuusvertailu haastattelemalla. Silva Fennica vol. 17 no. 2 article id 5186. https://doi.org/10.14214/sf.a15102
English title: Interview survey on the servicing properties of forest tractors.
Original keywords: metsäkoneet; metsätraktorit; ergonomia; huolto; kunnossapito; huoltotyö; kuormatraktori; työolosuhteet
English keywords: maintenance; working conditions; forest machines; forest tractors; ergonomy; serviceability
Abstract | View details | Full text in PDF | Author Info

The aim of this concise interview survey was to collect information about the servicing properties of forest tractors. Ten interviewees gave grades (in a scale from 4 to 10) concerning two servicing properties of various types of forest tractor. The rating covered the general safety during servicing (structural serviceability) and work postures during the work. Four types of forest tractor widely-used in Finland were chosen. The forwarders were of different size and structure.

According to the rating, the lightest forwarder was clearly superior to the other types. This machine was also the smallest in size and the most modern. Differences between the other three forwarders were not quite so clear. The variation between the machines as regards both so-called easy and troublesome tasks was considerable. Lubrication of the articulated shafts and supporting bearings was, however, very troublesome regardless the machine type. The heaviest tractor was considered the most difficult to service.

The PDF includes a summary in English.

  • Rieppo, E-mail: kr@mm.unknown (email)
  • Väyrynen, E-mail: sv@mm.unknown
article id 4567, category Article
O. J. Lukkala. (1939). Ojituksien kunnossapidosta sekä ojitettujen soiden metsien käsittelystä ja metsittämisestä. Silva Fennica no. 52 article id 4567. https://doi.org/10.14214/sf.a13974
English title: Forest management of forests in drained peatlands and maintenance of ditch network.
Original keywords: ojitus; metsänhoito; metsäopetus; valtion metsät; metsänhoitajien jatkokurssit; metsähallinto; jatkokoulutus; kunnostusojitus
English keywords: peatlands; maintenance; forest administration; forest education; state forests; professional development courses; drainage of peatlands
Abstract | View details | Full text in PDF | Author Info

Silva Fennica issue 52 includes presentations held in professional development courses, arranged for foresters working in public administration in 1938. The presentations focus on practical issues in forest management and administration, especially in regional level. The education was arranged by Forest Service.

This presentation discusses forest management practices of drained peatlands and the allocation of responsibilities in draining of peatlands between district forest officers and forest officers responsible of drainage work. Problems has occured in those cases, when the process of draining had lasted so long that at the time of final assessment of the project the first ditches have already needed maintenance.

  • Lukkala, E-mail: ol@mm.unknown (email)
article id 4501, category Article
Ilmari Lehtinen. (1937). Eräitä näkökohtia rakennusten suunnittelussa ja korjaustöissä. Silva Fennica no. 39 article id 4501. https://doi.org/10.14214/sf.a13911
English title: Planning and renovation of buildings.
Original keywords: metsäopetus; metsänhoitajien jatkokurssit; rakentaminen; rakennusten korjaus; rakennusten ylläpito; puurakennus; puutalo
English keywords: forest education; professional development courses; maintenance of buildings; wooden house; renovation
Abstract | View details | Full text in PDF | Author Info

The issue 39 of Silva Fennica includes presentations held in professional development courses in 1935 that were arranged for foresters working in public administration. The presentations focus on practical issues in forest management and administration, especially in regional level.

This presentation describes building and renovation of wooden buildings, that were owned by the forest organizations.

  • Lehtinen, E-mail: il@mm.unknown (email)
article id 4497, category Article
Erkki J. Simola. (1937). Kyläteiden tieyksiköistä. Silva Fennica no. 39 article id 4497. https://doi.org/10.14214/sf.a13907
English title: Road units and right of way in village roads.
Original keywords: metsäopetus; metsänhoitajien jatkokurssit; kylätie; tiestö; tieosakas; tieyksikkö; tien kunnossapito
English keywords: forest education; professional development courses; maintenance of roads
Abstract | View details | Full text in PDF | Author Info

Silva Fennica Issue 39 includes presentations held in professional development courses in 1935 that were arranged for foresters working in public administration. The presentations focus on practical issues in forest management and administration, especially in regional level.

This presentation describes the use and maintenance of village roads.

  • Simola, E-mail: es@mm.unknown (email)
article id 4490, category Article
Erkki J. Simola. (1937). Teiden rakentamisesta ja kunnossapidosta. Silva Fennica no. 39 article id 4490. https://doi.org/10.14214/sf.a13900
English title: Building and maintenance of roads.
Original keywords: metsäopetus; metsänhoitajien jatkokurssit; tienrakennus; teiden kunnosapito
English keywords: forest education; professional development courses; building of roads; maintenance of roads
Abstract | View details | Full text in PDF | Author Info

Silva Fennica Issue 39 includes presentations held in professional development courses in 1935 that were arranged for foresters working in public administration. The presentations focus on practical issues in forest management and administration, especially in regional level.

This presentation gives guidlines in building and maintaining roads in forest administration.

  • Simola, E-mail: es@mm.unknown (email)

Category : Research article

article id 10494, category Research article
Hannu Hökkä, Ari Laurén, Leena Stenberg, Samuli Launiainen, Kersti Leppä, Mika Nieminen. (2021). Defining guidelines for ditch depth in drained Scots pine dominated peatland forests. Silva Fennica vol. 55 no. 3 article id 10494. https://doi.org/10.14214/sf.10494
Keywords: Pinus sylvestris; forest management; peatland; drainage; ditch network maintenance; process model; water table
Highlights: Process-based hydrological model was applied to drained peatland forests representing a wide range of conditions in Finland; Ditch depth keeping the median July–August water table below 0.35 m was defined; Ditch depth depended on climatic conditions, stand volume, peat properties, and ditch spacing; Shallower ditches than recommended in practice proved to be sufficient in most situations.
Abstract | Full text in HTML | Full text in PDF | Author Info

We used a process-based hydrological model SUSI to improve guidelines for ditch network maintenance (DNM) operations on drained peatland forests. SUSI takes daily weather data, ditch depth, strip width, peat properties, and forest stand characteristics as input and calculates daily water table depth (WTD) at different distances from ditch. The study focuses on Scots pine (Pinus sylvestris L.) dominated stands which are the most common subjects of DNM. Based on a literature survey, and consideration of the tradeoffs between forest growth and detrimental environmental impacts, long term median July–August WTD of 0.35 m was chosen as a target WTD. The results showed that ditch depths required to reach such WTD depends strongly on climatic locations, stand volume, ditch spacing, and peat thickness and type. In typical ditch cleaning areas in Finland with parallel ditches placed about 40 m apart and tree stand volumes exceeding 45 m3 ha–1, 0.3–0.8 m deep ditches were generally sufficient to lower WTD to the targeted depth of 0.35 m. These are significantly shallower ditch depths than generally recommended in operational forestry. The main collector ditch should be naturally somewhat deeper to permit water outflow. Our study brings a firmer basis on environmentally sound forestry on drained peatlands.

  • Hökkä, Natural Resources Institute Finland (Luke), Natural resources, Latokartanonkaari 9, P.O. Box 2, FI-00791 Helsinki, Finland E-mail: hannu.hokka@luke.fi (email)
  • Laurén, University of Eastern Finland, Faculty of Science and Forestry, School of Forest Sciences, P.O. Box 111, FI-80101 Joensuu, Finland E-mail: ari.lauren@uef.fi
  • Stenberg, Natural Resources Institute Finland (Luke), Natural resources, Latokartanonkaari 9, P.O. Box 2, FI-00791 Helsinki, Finland E-mail: leena.stenberg@luke.fi
  • Launiainen, Natural Resources Institute Finland (Luke), Bioeconomy and environment, Latokartanonkaari 9, P.O. Box 2, FI-00791 Helsinki, Finland E-mail: samuli.launiainen@luke.fi
  • Leppä, Natural Resources Institute Finland (Luke), Bioeconomy and environment, Latokartanonkaari 9, P.O. Box 2, FI-00791 Helsinki, Finland E-mail: kersti.leppa@luke.fi
  • Nieminen, Natural Resources Institute Finland (Luke), Natural resources, Latokartanonkaari 9, P.O. Box 2, FI-00791 Helsinki, Finland E-mail: mika.nieminen@luke.fi
article id 904, category Research article
Raul Fernandez-Lacruz, Fulvio Di Fulvio, Dan Bergström. (2013). Productivity and profitability of harvesting power line corridors for bioenergy. Silva Fennica vol. 47 no. 1 article id 904. https://doi.org/10.14214/sf.904
Keywords: accumulating felling head; clearing; maintenance; motor-manual; power grid; wood fuel
Abstract | Full text in HTML | Full text in PDF | Author Info
Trees growing under the wires and around the pylons carrying power lines (PL) represent a significant threat to the power supply because they can cause power outages and damage. The vegetation in these PL corridors is cleared motor-manually on a regular basis, which represents about 50% of the PL maintenance costs. In Sweden, PL corridors account for 140 000 ha of productive forest land, with an estimated bioenergy potential of 3 TWh/year. The aim of this study was to measure the productivity of a harvester (with an accumulating felling head) and a forwarder, performing PL corridor clearing (with the collection of whole trees for energy use) and to calculate how the cost and economic profitability is dependent on tree height, biomass removal, harvested area, forwarding distance and wood fuel price. The study also compared the economic profitability of the mechanized harvesting system with motor-manual clearing. Experimental units were inventoried along a PL corridor in central Sweden and a time study of one harvester and one forwarder (with a single operator per machine), working in those units, was carried out. The results showed that if the tree height was greater than about 6 m, the mechanized harvesting system became a more cost-efficient alternative, when compared to motor-manual clearing, but it was also found that mechanized clearing is not always the most cost-effective option. Nevertheless, mechanization of PL clearing has a huge potential for expansion, requiring further research in the combined management of the PL corridors and side areas.
  • Fernandez-Lacruz, Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences, SE-901 83 Umeå, Sweden E-mail: raul.fernandez@slu.se (email)
  • Di Fulvio, Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences, SE-901 83 Umeå, Sweden E-mail: fulvio.di.fulvio@slu.se
  • Bergström, Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences, SE-901 83 Umeå, Sweden E-mail: dan.bergstrom@slu.se
article id 420, category Research article
Jukka Matero. (2004). Cost-effective measures for diffuse load abatement in forestry. Silva Fennica vol. 38 no. 3 article id 420. https://doi.org/10.14214/sf.420
Keywords: buffer strips; cost effectiveness; drainage maintenance; nutrient leaching
Abstract | View details | Full text in PDF | Author Info
This paper theoretically and empirically analyzes the design of cost-effective diffuse load abatement in forestry. Harvesting with related forest regeneration and drainage maintenance increases nutrient leaching, while riparian buffer strips and adjustments in drainage maintenance technology can be used to prevent this leaching. By utilizing a two-period model it is shown that cost-efficiency requires the establishment of a buffer strip system and a reduction in both current harvesting, and in drainage maintenance – if practized – relative to the private optimum to reflect their effects on water pollution. A simulation analysis was conducted to assess the magnitudes of the decision variables of the theoretical model, as well as to evaluate alternative technologies for the implementation and use of buffer strips and for the adjustment of drainage maintenance. The results for a representative forest holding in the southern half of Finland show that it is possible to considerably reduce total phosphorus leaching with minor cost.
  • Matero, University of Joensuu, Faculty of Forestry, P.O. Box 111, FI-80101 Joensuu, Finland E-mail: jukka.matero@joensuu.fi (email)

Register
Click this link to register to Silva Fennica.
Log in
If you are a registered user, log in to save your selected articles for later access.
Contents alert
Sign up to receive alerts of new content
Your selected articles