Productivity and energy consumption in logging operation in a Cameroonian tropical forest

摘要: Abstract The logging activities influences the forests conservation and their management in Congo Basin, for these raisons must be supported by an energetic assessment, compatible with a sustainable forest management. This study aims to provide experimental data on working time, productivities, energy input of tropical forests. forestry company is aligned FSC certification scheme. sites showed good level internal organization, but require more planning framework that allows higher interaction between plans harvesting. mechanization was high valid most contexts skidder use preferable order maximize productivity reduce environmental impacts. staff had already training. Ergonomics reached even if stressed out conditions. Energy inputs mainly direct (felling first processing operations, 57.37 MJ m −3 ; 62.10 MJ m Logs loading 72.26 MJ m ). Bunching extraction performed best yard terms (90.7 MJ m ), (10.187 m 3  h −1 worker ) significant protection.