Fleet Management System (FMS) is used for the purpose of collecting and remote sending measured data from two investigated forwarders. Measured data were: fuel consumption, rpm, hydraulic crane work detection, GPS coordinates of forwarders and time. Based on the collected data and their processing it was brought judgment of the applicability of commercial FMS what means its good sides and the disadvantages of the same.Parallel with the measurement of forwarders features, it was measured the impact of a forwarder to change physical-mechanical characteristics of the soil. For this purpose it was measured soil bearing capacity of soil in ruts and on undisturbed soil between and outside of the ruts. It was measured also the shear strength of the soil on surface and the soil depth of 15 cm. In the purpose of determination of density changes disturbed soil, soil capacity for water and air and the current soil moisture samples were taken with cylinders on the surface and in the soil depth of 30 cm. As an indicator of the environmental benefits of the works is an essential parameter of the rut depth that is also measured in the studied sites.With portable weighing platform it was measured axial load of forwarders during extracting wood to the landing site. Based on the known axle load it was calculated wheel numeric as dimensionless parameter that depends on the characteristics of the ground and the vehicle, which according to WES method determines the acceptability of the work. Using recorded coordinates of forwarders movement it was calculated the percentage of trampled soil surface for the three investigated sites during the transportation in first of technical roundwood (technical roundwood and long firewood), and the subsequent transportation of biomass or forest residue.Based on sample weight of each load of timber extraction, the paper presents the results of load usability of investigated forwarders during exporting technical roundwood and biomass from seeding and final felling areas. Based on the known length and volume of wood assortments in every tour, the length and volume utilization of cargo space was also calculated.In the paper were presented calculated values of energy return on investment - EROI for three different wood products at the level of the Forest Organization Unit Vinkovci.At the end, it were examined the features of Forwarder Valmet 840.2 (6-wheeled) and Valmet 860.4 (8-wheeled) using morphological analysis.