Mathematical model of the soil class and agro technical background influence on tractor propulsive power realization

The tractor draft properties depending on soil conditions which can change in rather wide range is considered. Algorithm model for automation the process of the draft property change calculations for two types of tractors (wheel tractor and caterpillar tractor) depending on agro technical background change (virgin lands, stubble, fallow, plough up soil) and soil class (strong, middle, weak) was offered. The conclusions is made.