J. For. Sci., 2012, 58(1):21-26 | DOI: 10.17221/4804-JFS

Productivity and cost of farm tractor skidding

N. Gilanipoor, A. Najafi, S.M. Heshmat Alvaezin
Tarbiat Modares University, Tehran, Iran

In this study, productivity rate and operation cost of farm tractor were evaluated in a mountainous natural forest. Data for the study came from a detailed time study in the Research and Educational Forest of Tarbiat Modares University (REFTMU) and was used to develop a multiple linear regression model to predict the skidding cycle time. The results showed that effective independent variables of skidding time were skidding distance and slope of skid trail (P = 0.01). Average productivity rate ranged from 2.43 to 2.60 m2.h-1. Total time and effective time, respectively. Total cost of the system was 10.24 USD.h-1 whereas 4.58% of the cost of skidding resulted from personal delay. The cost and productivity resulting from this study emphasized the importance for foresters to consider a farm tractor when designing skidding operations in young stands or prescribing a combination of two machines in mature stands.

Keywords: skidding operation; continuous time study; regression model; forest system efficiency; Iranian forest

Published: January 31, 2012  Show citation

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Gilanipoor N, Najafi A, Heshmat Alvaezin SM. Productivity and cost of farm tractor skidding. J. For. Sci. 2012;58(1):21-26. doi: 10.17221/4804-JFS.
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