The objective of this research was to determine the effect of forest harvesting caused by reduced impact logging (RIL) to wood residues. This research was carried out in a natural tropical forest of Ketapang, West Kalimantan. The result of the research showed that the volume of wood residues by conventional logging (CL) were 13.70 m3/ha (39.58 %) or the average of wood residues were 2.28 m3 from a tree felled. However, the volume of wood residues by reduced impact logging (RIL) were 11.059 m3/ha (24.70 %) or the average of wood residues were 2.08 m3 from a tree felled. The research indicated that the effect of forest harvesting to wood residues caused by RIL was lower than that of conventional logging (CL).
                        
                        
                        
                        
                            
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