Sure. Probably not specifically corn, but fabulously productive farmland.
If global warming was real, corn production could move north into Russia.
That’s why the latest term is ‘climate disruption’. That way, whatever happens, it’s bad and humans caused it.
There has been a scientific explanation, not related to climate change, on why weather has changed further North at glaciers. I read some thing about it, but I am not into that much. I know I saw a meteorologist on TV, who was discussing the cycles of weather from hot to cold that are every 40-50 years.... and may look like climate change but aren’t?