A system for distributing crop material on a cleaning sieve of an agricultural combine, comprising: a threshing system; a sieve positioned and configured for receiving crop material containing grain from the threshing system and allowing the grain and smaller elements of the crop material to pass through the sieve while guiding and propelling a flow of larger elements of the crop material past an edge of the sieve; a crop material distributor disposed between the threshing system and the sieve, configured and operable for distributing the crop material from the threshing system onto the sieve; a sensor configured and operable in response to sensing information representative of at least one of a quantity of grain associated with the crop material distributor and an inclination angle associated with at least one of the crop material distributor and the combine and outputting signals representative thereof; and a controller in connection with the sensor operable for receiving signals outputted thereby, the controller outputting signals to the crop material distributor and the sieve for operable control of operating parameters associated with the crop material distributor and the sieve in response to receiving signals representative of at least one of a quantity of grain associated with the crop material distributor and an inclination angle associated with at least one of the crop material distributor and the combine, characterized in that: the crop material distributor is an auger bed comprising a rearwardly extending auger; and operable control of operating parameters associated with the crop material distributor consists of controlling rotational speed of the auger. a threshing system; a sieve positioned and configured for receiving crop material containing grain from the threshing system and allowing the grain and smaller elements of the crop material to pass through the sieve while guiding and propelling a flow of larger elements of the crop material past an edge of the sieve; a crop material distributor disposed between the threshing system and the sieve, configured and operable for distributing the crop material from the threshing system onto the sieve; a sensor configured and operable in response to sensing information representative of at least one of a quantity of grain associated with the crop material distributor and an inclination angle associated with at least one of the crop material distributor and the combine and outputting signals representative thereof; and a controller in connection with the sensor operable for receiving signals outputted thereby, the controller outputting signals to the crop material distributor and the sieve for operable control of operating parameters associated with the crop material distributor and the sieve in response to receiving signals representative of at least one of a quantity of grain associated with the crop material distributor and an inclination angle associated with at least one of the crop material distributor and the combine, the crop material distributor is an auger bed comprising a rearwardly extending auger; and operable control of operating parameters associated with the crop material distributor consists of controlling rotational speed of the auger.