Avalia??o técnica e econ?mica da extra??o de madeira de eucalipto com'clambunk skidder'

摘要

The objective of this study was to evaluate technical and economic log extraction activities using a clambunk skidder with tracks over the tires. The technical evaluation consisted in determining the log extraction productivity indexes and the economic evaluation was based on operational cost determination. The experimental design was complete randomized, with a 3x2x5 factorial arrangement (three slope levels, two wood productivity classes and five ranks of extraction distance, with three repetitions). In a general way, the results showed that the equipment productivity decreases with the increase of the slope terrain and the extraction distance. Its productivity varied from 18.34 m3.h-1 to 72.08 m3.h-1. The operational cost was US$ 90.93 per effective worked hour.