British Columbia, Canada.
The main crops are canola, wheat, barley and oats. Most are for export or livestock feed, and 80% is grown in one single area of our province (Peace River). Our wet climate is a major limiting factor (article).
Sidenote, I also know from locals that organic hay/straw is very difficult to come by due to our climate and growing limitations.
Historically these same crops were grown, but it doesn’t sound like on much scale due to the competition with the prairies.