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Prediction model of tree felling by chainsaw in selection system (Case study: Namkhaneh District, Kheiroud forest) | ||
| تحقیقات جنگل و صنوبر ایران | ||
| Article 15, Volume 19, Issue 2 - Serial Number 44, June 2011, Pages 351-340 PDF (317.68 K) | ||
| Document Type: Research article | ||
| DOI: 10.22092/ijfpr.2011.107575 | ||
| Authors | ||
| Jafar Fathi* 1; Mohammad Reza Azarnoosh2; Nasrollah Rafatnia3; Javad Mirarab4 | ||
| 1M.Sc. student of forestry, Faculty of natural resources, Islamic Azad university, Chalous branch | ||
| 2Assistant Prof., Faculty of natural resources, Islamic Azad University, Chalous branch | ||
| 3Associate Prof., Faculty of forestry and wood and paper technology, Gorgan University of agricultural science and natural resources | ||
| 4M.Sc. graduated, Faculty of natural resources, University of Tehran | ||
| Abstract | ||
| Regarding to special situation of northern forests in Iran, chainsaw is a unique cutoff. Nevertheless, study to evaluat operation efficiency is imperative. Present study was carried out with the aim of time study of cutting operation, estimating the productivity and costs of chainsaw, and developing a regression model. According to the results of this study, the hourly production of cutting by chainsaw with and without delay time were 51.6 m3/h (9.6 trees/h) and 86.2 m3/h (16 trees/h), respectively. Cutting productivity was increased related to DBH as power model and on the other hand the unit cost was decreased. Total cutting cycle time with and without delay time were averaged 6.24 and 3.74 minutes, respectively. | ||
| Keywords | ||
| time study; cutting; Regression model; Production; Cost | ||
| References | ||
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