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1

Multifactor analysis of time consumption in manipulation and cutting stacked wood into length

100%
Szewczyk G., Sowa J. M., Kulak D., Stanczykiewicz A.
Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria
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2012
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tom 11
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nr 2
Cutting stacked wood into length by means of a petrol chainsaw is a typical technical and technological wood harvesting solution. Due to the fact that wood harvesting is most commonly performed with the use of Tree-Length-System (TLS) or Long-Length-System (LLS), cutting into length in Poland is performed either after the first stage of skidding stems or logs to the skidding route or after the second stage of transportation, that is at the depot. Research was carried out in depots, during early and late thinnings of pine, fir, spruce and beech stands by means of manipulation and cutting into lengths using petrol chainsaws (Table 1). The aim of the study was to specify time consumption on the basis of the relativeness of EST = f (category of harvesting, roller’s length, chosen elements of the working day structure). Continuous time-motion analysis was carried out, according to the classification presented in Table 2. After completing harvesting, the produced material was received. Figure 1 presents the percentage of work activities observed in operational time. Performing cutting into length activities at a discussed working site resulted in high time percentage in case of T12 and T22 times. Table 3 presents the average values of time consumption correlated in terms of soft and hard wood species in the categories of early and late thinning stands. Some statistically significant differences in labour consumption levels have been demonstrated in case of specific stands and harvesting technologies. One multiple regression equation has been estimated – for early and late thinning. The regression model has been expressed by a formula (1). The equation parameters have been compiled in Table 4. Research results point to the relation between time consumption, the specific elements of the time structure of a working day, and the length of produced rollers expressing variable volume of produced rollers.
2

Prospects for fuel wood harvesting in Poland

100%
Jablonski K., Rozanski H.
Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria
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2003
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tom 02
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nr 1
3

Ecological aspects of wood harvesting and skidding in pine stands with use different technologies

84%
Glazar K., Maciejewska M.
Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria
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2009
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tom 08
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nr 3
The new look at the forest economy takes into considerationmaximum protection of forest ecosystems, first of all. The purpose of the research was to estimate the influence of wood harvesting and skidding technologies on forest environment, particularly on soil and remained stand. The traditional wood harvesting and skidding technology (compact sawing machine, tractor with winch) was more friendly for soil environment than the newest technology (harwarder). Decrease of the negative influence of engineering wood harvesting and skidding process on forest environment is possible through application of both technologies and technical means correctly selected for the purpose. Besides, the operator’s practice is of a significant meaning.
4

Porovnanie fyzickeho zatazenia pracovnikov v tazbe dreva

84%
Messingerova V., Tullova M., Ferencik M.
Prace Komisji Nauk Rolniczych i Komisji Nauk Leśnych. Poznańskie Towarzystwo Przyjaciół Nauk
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2007
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tom 101
5

Tree damage in harvesting and skidding wood in mature beech stands

84%
Holota R.
Zeszyty Naukowe Akademii Rolniczej w Krakowie. Sesja Naukowa
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2005
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tom 91
167-172
6

Application of technology foresight in a wood processing industry in Kosice region

84%
Sebo J., Horkay M.
Intercathedra
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2008
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tom 24
7

Potencial lesopilnojj promyshlennosti Ukrainy

84%
Pinchewska O., Marchenko N., Garbachowa A.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
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2012
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tom 79
8

Crushing logging residues with Meri Crusher MJ-2.3 ST and MJ-2.3 DT machines

84%
Rozanski H., Jablonski K.
Forestry
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2002
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tom 05
9

Porovnanie hlukovej zataze pracovnikov v tazbe dreva

67%
Messingerova V., Tullova M., Ferencik M.
Prace Komisji Nauk Rolniczych i Komisji Nauk Leśnych. Poznańskie Towarzystwo Przyjaciół Nauk
|
2007
|
tom 101
10

Effects of work methods on physical load of logger in wood harvesting operations

67%
Stempski W., Grodecki J.
Zeszyty Naukowe Akademii Rolniczej w Krakowie. Sesja Naukowa
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2005
|
tom 91
383-389
11

The energy consumption of selected technologies of fuel chips harvesting

67%
Maciejewska K., Wojtkowiak R.
Zeszyty Naukowe Akademii Rolniczej w Krakowie. Sesja Naukowa
|
2005
|
tom 91
203-207
12

Efficiency of exploitation of the vehicle that can be used alternatively as a forwarder or calm bunk skidder

59%
Zychowicz W.
Zeszyty Naukowe Akademii Rolniczej w Krakowie. Sesja Naukowa
|
2005
|
tom 91
291-298
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