%0 Journal Article %T SOIL STRUCTURE AND HARDNESS CHANGE RESULTING FROM THE DEPTH OF A TRACTOR TRACK UNDER DIFFERENT WHEEL DRIVE TOWING STRENGTH %A Chernikov, O.N. %A Bychenin, A.P. %A Sazonov, D.S. %K wheel track mover, slipping, soil, properties, physical %J Bulletin Samara State Agricultural Academy %D 2019 %N 4 %P 5 %I Samara State Agricultural Academy