Answer:
Few people changed American agriculture more than Cyrus McCormick. His invention, the McCormick 'Virginia' reaper, revolutionized farming by combining many steps involved in harvesting crops into one machine. McCormick's reaper could cut more wheat in a day than a half-dozen farmhands.
So, the answer is i believe the South, sorry if i'm wrong, hope this helps, have a great day/night, and stay safe!