The aim of the paper is to determine the influence of particular factors on the diversity of selected countries in terms of the volume of wood forest resources. Two factors affecting the variable have been analysed in the paper: 1) the growing stock per 1 ha of forest area and 2) the forest cover. Logarithmic method was used to assess the influence of the deviations of the said factors on the deviation of the amount of wood forest resources. Thirty five countries – including Serbia – have been examined. Data for 2015 have been used for calculations.