%0 Journal Article %T Results production tests combination drills on stumps %A Fedorov, O.. %A Rybalkin, D.. %K drill, manufacturing operations, seeding. %J Actual directions of scientific researches of the XXI century: theory and practice %D 2015 %N 3 %P 3 %I FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov