Acta Scientiarum Polonorum
Silvarum Colendarum Ratio et Industria Lignaria

Abstract The reduction of fuel fossil resources and the tendency to limit emission of harmful substances into the atmosphere have influenced an increase of utilization of wood, especially wood chips. The object of performed investigations was to determine the operative labour consumption of technologies applied in wood chips harvesting that nowadays are used in the PGL State Forests. The technologies analysed, differed in the extent to which machines were used. The assesment comprised work output. The technology based on mechanical skidding and chipping with a chipper with a mechanical feeding system was the least labour-consuming. The technology in which horse skidding was used and the wood was chipped with a chipper with a manual feeding was the most labour-consuming. Manual skidding was the most labour-consuming and chip trucking the least, with the exception of technology with horse skidding, which was the most labour-consuming.