It would be sweet if it was an actual tractor. Winning team's mascot would get to drive it out on the field for the next year's game. It'd get everyone riled up!
Get John Deere or whoever to donate an old-school - working 1917 tractor (The year both schools started playing each other.) Slap on some ISU and K-State logos on it, boom. Farmageddon!
1917 - Waterloo Boy
Our colors on one half KSU's on the other. That would be a cool trophy