The grain dryer further includes a metering roll positioned to contact {TAIL ~ grain} advancing out of the discharge opening of {HEAD ~ the grain column} 
The grain dryer further includes a metering roll positioned to contact { TAIL ~ grain } advancing out of the discharge opening of { HEAD ~ the grain column }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD