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- W2141336055 abstract "In Thailand, about 5.3% of the total area is covered with rubber (Hevea brasiliensis) plantations. Every year rubber trees are felled when latex yield tends to decrease, about every 2530 years interval, to an uneconomical level at approximately 30,000 ha (RUBBER RESEARCH INSTITUTE OF THAILAND 2010). The most common harvesting method is clear cutting. Felled rubber trees are delimbed, scaled and bucked into mill specified length with chainsaw at the stump area. The process of this typical rubber wood harvesting is comprised of four tasks: felling, processing, loading and transporting. This paper define this system as short wood system, and investigated on its productivity, cost, and time prediction for chainsaw felling, manual processing with chainsaw, and transportation using a pickup truck. There have been many studies on short wood system’s productivity, operation cost, and time study for chainsaw felling. BEHJOU et al. (2009) studied productivity and cost of manual felling using chainsaw in uneven-aged beech (Fagus orientalis Lipsky) stand in Caspian forests. They found that the net productivity and cost of manual felling were 26.1 m3 per hour and 0.81 USD/ m3, respectively. MOUSAVI et al. (2011) showed that the productivity of felling tree and average cost were 35 m3 per effective hour and 0.22 USD/m3 with chainsaw processing. GHAFFARIYAN and SOBHANI (2007) showed that the felling cost by chainsaw was approximately 5.81 USD per hour for the team work of three persons. But studies on the short wood system method in rubber plantation have been few. The study of MOUSAVI (2009) showed that the productivity increased with increased tree size and the best independent variables were tree height and volume in the time consumption model for chainsaw bucking process. The log volume and log length were important variables in the time prediction model for manual processing (GHAFFARIYAN and SOBHANI 2007). All required length logs of rubber wood are transported from plantation to sawmill directly by compact truck “pickup truck”. Pickup trucks modify rear cargo part to increase the capacity of payload, and can easily access plantation areas but with small payload. Transportation distance and load volume were the major effective variables according to the time consumption model of" @default.
- W2141336055 created "2016-06-24" @default.
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- W2141336055 date "2014-02-25" @default.
- W2141336055 modified "2023-09-24" @default.
- W2141336055 title "Short wood harvesting and pickup truck transportation during regeneration of rubber plantations" @default.
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