I've never actually driven a tractor, but with their huge rear tires, slow-revving motors and lack of speed I thought I saw some parallels between John Deere and "The Motor Company."
On the other hand, I do know a good farm joke:
A farmer was arrested and jailed after being observed having sex with one of his sheep. He asked a friend to hire a lawyer, but he didn't have much money; his friend said he knew of someone who wasn't the greatest litigator, but he was cheap and had a reputation for being great at jury selection. During the trial, the prosecutor said to the defendant "And isn't it true, farmer Brown, that after being forced to have sex with you, your sheep was observed to turn around and lick your ***** and ****s off?" Whereupon one juror commented to another "You know, a good sheep'll do that!"