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