For those who weren't suckled on the twin teats of soy and corn, the steel plow was necessary to break through the tough sod/turf/peat of the prairie in the Midwest and turn it into croppable land, as traditional wooden plows were too weak. However prairies aren't a geographical feature unique to America, so did the steel plow bring crop farming to any other place on earth?
I don't think other places have quite the same "cult of the plow" that you see in the Midwest of the United States. However, the 19th century saw parallel economic and demographic transformation took place in the grassland/steppe/prairie/pampas regions of both Eastern Europe and the Southern Cone.
Like the United States, both Eastern Europe (Ukraine-Russia, basically) and the Southern Cone (mostly in Argentina) saw the former semi-nomadic inhabitants politically and demographically marginalized, and the semi-arid grasslands were re-populated settler populations who converted those lands to their current set of uses for large-scale cattle and grain production.