Akhmedov Sherzod Anvarhon ugli and Latipov Mamurjon 2021. Investigation Of The Effect Of Travel Speed And Tire Pressure On The Depth Of The Wheel Rut Of A Tractor With Adjustable Ground Clearance, On The Hardness And On The Density Of The Soil. The American Journal of Applied Sciences. 3, 11 (Nov. 2021), 54–58. DOI:https://doi.org/10.37547/tajas/Volume03Issue11-10.