Abstract

DE BEDIA, G. R. et al. Yield and performance analysis of a tractor adapted for the extraction of firewood in a silvopastoral system. Quebracho (Santiago del Estero) [online]. 2021, vol.29, n.1, pp.50-58.  Epub Sep 01, 2021. ISSN 0328-0543.

Traditionally, the forest extraction of firewood in the Semi-arid Chaco is carried out in precariously with implements of little technological development and meager ergonomics. The use of agricultural machines during forest harvesting causes high environmental impact on the remaining vegetation. Aiming at minimizing the damage to standing trees, the need to design new mechanized alternatives arises. The objective of this study is to analyze the yield and performance of a small tractor adapted for forestry operations during primary transport by incorporating a forest sled. The work was located in a forest managed by the silvopastoral system in the Semi-arid Chaco region of Argentina, Silipica Department, Province of Santiago del Estero. Ninety working-cycle operating systems, yields and distances were recorded during forest harvesting. The woody material obtained was directly cubed on the store yards. The results show that in the extraction cycle the longest activity is “Loading” (0:03': 19”), followed by “Downloading” (0:02':21”) while both “Empty Transport” and “Loaded Transport” (0:01':29 ”0) remain similar which adds an average time of 0: 08': 39” per duty cycle. The total and average distance covered was of 325.6 m and 162.8 m per net working cycle, where the mean transfer speed obtained was of 7.5 km / h. The average yield of wood extraction as firewood per net working cycle was of 1.02 stereo cubic meters / trip, which represents approximately 650 kg / trip. According to the characteristics and capabilities of the equipment used, its performance lays within a reasonable range, with ample room for improvement.

Keywords : Primary transport; Semi-arid Chaco; Operating times.

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