Analyzing nonfiction about dustiness investigations, was found that the concentration of dusts are dangerous, because they are not little. Dusts are interfering with health and eventually it can become the reason of serious industrial disease. There were not found any literature about analyzing the dusts topic in tractors. In using this enginery, the main works are doing when it is the best time in dusts arising (in spring, in summer, in autumn). The aim of this work is to explore the concentration of dusts levels in agricultural tractors, when there are doing various lands working and other operations. There were found that it has been not less as 29 measurement off amount (in experimentations there were chosen not less than 30), that the maximum concentrations of dusts bias won’t go off 0,25 mg/m3 . Experimentally was find that the concentrations of dusts won’t go off 10 mg/m3 of long effect number by HN 23:2007. But making experimentations there were find the maximum concentration of dusts (5,6 mg/m3) and this is potencialy dangerous for operators health. The highest average concentration of dusts was evaluate in autumn in plough time, in „New Holland T7060“ tractors booth (4,6 mg/m3), when the ventiliation was up on all power and the air moving speed more than 0,3 m/s. In objevtive to make lower the dustiness and to make the better operators work environment in tractors booth, there were selected the ventiliation plan and there were made a calculation of the gear, whitch helps to deal the air flow more gradually in tractors booth.

Raktažodžiai: dusts, agriculture, tractors, work environment