TECHNIQUE FOR DETERMINING THE DEMAND FOR GRAIN MACHINES
Ways and methods for solving the identified problems are considered on the case of combine harvesters. The consumer properties of these machines depend on their design parameters, yield of the crop being harvested and the structure of its grain pile, operating speed, as well as permissible restrictions on the quality of harvesting. The ASAE (USA) standard sets an upper limit for the speed range of a combine harvester at 6.5 kmh. To normalize the Russian operating conditions of the harvesters, under which their consumer properties are determined, let us take a single value of the maximum operating speed of 2.0 ms (7.2 kmh). The adoption of such a norm allows us to introduce a new estimated indicator for combine harvesters. It takes into account the “marginal yield”, which uniquely indicates the boundary dividing the fields into low-yielding (Y <Ym) and high-yielding (Y≥Ym) for each harvester. At the same time, the absolute value of the yield itself does not play a role.