it is a john deere harvester with a 12 row corn head probably close to half million $ has multiple other heads to harvest grains. wheat. oats soy beans
You have a better eye than I.
I guessed it was a grain header on it.
We never saw corn crops when/where I grew up though they grow corn back there now.
And the machines are so vastly different.
When I lived out in Idaho during the past decade I had a neighbor whose father had cleared and plowed forest land for farming behind a team of horses.
His son now runs a fleet of big machines just like the one we were looking at.