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