I plowed once - one furrow - behind a span of mules (my great-aunt Ruth's Snowball and Burr-Baby) under the direct supervision of her farm boss. I had my eyes glued to the tree line.
Quick question for extra credit: what do you call the fallow space at the end of the field that you use to turn your team around for the next furrow?
Would that be the headlands?
We always called it a 'turn row'.