TY JOUR TI RESULTS OF MULTIVARIATE EXPERIMENT TO DETERMINE DEPENDENCE OF THE MAXIMUM PRESSURE OF TRACTOR WHEELS ON THE SOIL FROM TRACTOR’S PARAMETERS AND PHYSICAL AND MECHANICAL PROPERTIES OF SOIL. ANALYSIS OF THE EQUATIONS KW wheel pressure on the ground KW tractor’s parameters KW soil hardness KW soil density KW the diameter of the wheel KW the width of a tire KW a load on wheel KW pressure in tire KW the regression equation. JO Vestnik of Kazan State Agrarian University AU Khafizov, K.. AU Khafizov, R.. PY 2017 IS 11 PB Kazan state agrarian University