Productivity of Vimek 404 T5 harvester and Vimek 610 forwarder in early thinning.
The scope of the study was to evaluate productivity of small size forest machines in early thinning, as well as to identify opportunities to use this technology to Latvia. The study was implemented in Sweden using Vimek 404 T5 harvester and Vimek 610 forwarder. The machines 2 5 S0 0 2 1 2 0 operators' experience. Time studies were done by team of researchers from Latvian State forest Research Institute 'Silava' The study demonstrated that Vimek 404 T5 harvester has considerable advantages in compare to conventional forest machinery to produce limited number of assortments like biofuel or mixture of pulpwood and biofuel in early thinning. Annual capacity of a single harvester working in one shift is 800 ha or 25,000 m 2 00 machine is limited it might not work efficiently in commercial thinning in Latvia due to large number of assortments required by customers, and it has limited possibilities of utilization during seasonal restrictions of forest operations. Productivity of Vimek 610 forwarder is comparable 2$ 1$ $4 2 2 1 ss beneficial with increase of forwarding distance. Prime cost of biomass, including harvesting, forwarding and road transport to a 50 km distance is 14.3 EUR m. Hourly cost of Vimek 404 T5 and 610 is similar 26 28 EUR h.