The apparatus further includes a metering roll positioned to contact grain advancing out of said discharge opening of said grain column, wherein said metering roll has a vane diameter equal to {TAIL ~ VD}, and {HEAD ~ VD≧6.0 inches} 
The apparatus further includes a metering roll positioned to contact grain advancing out of said discharge opening of said grain column , wherein said metering roll has a vane diameter equal to { TAIL ~ VD } , and { HEAD ~ VD≧6.0 inches }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD