Planet Money by NPR made an episode [0] on this a few years ago. I highly recommend listening to it if you're curious to know more.

>Vince Kosuga was an onion farmer back in the 1930s. A pretty successful one. But farming wasn't enough for him. He also liked to make bets on wheat and other crops. Then he had an idea: Why not try his luck with the crop he knew best?

[0] https://www.npr.org/sections/money/2015/10/14/448718171/epis...