Abstract: An apparatus for use in combination with a combine for sensing the volume of tailings exhausted from a cleaning section of the combine and for providing a visual indication to the operator of the effectiveness of combine operation. The combine includes a mobile frame or chassis having an operator compartment arranged toward a forward end thereof. A threshing section of the combine separates grain from crop material delivered thereto. A cleaning section of the combine functions to remove chaff and tailings from the materials received from the threshing section. A tailings section of the combine is arranged to receive incompletely threshed and separated tailings from the cleaning section. The tailings section comprises a tailings conveyor for forcibly moving tailings toward an elevator that moves the tailings to one of the other sections on the combine for recycling.