As a former Albertan, and a former Zone 3b gardener - I've wondered about this too.
For those not from the prairies, a section is 1 square mile of land, and many farmers own multiple sections. 1 section = 640 acres. It makes "human scale" or work-intensive agriculture very difficult.
The major crops I recall - are canola and wheat, and some
flax. Fields of yellow or blue as far as the eye can see. A field might easily be one quarter section. Also lots of cattle. (I <3 Alberta Beef signs everywhere). Also really delicious honey. I believe legumes are also common crops.
There are a lot of "less popular" fruits and nuts that grow well in Alberta - the wonderful thing about Alberta - and the thing I miss is that deep rich black prairie soil.
A few things I can think of that grow- choke cherries, sour cherries, cold hardy apples, crab apples, haskaps, saskatoons, hazelnuts, raspberries, rhubarb, Canadian plums, some northern Chinese fruit (I think there's an apricot???), and some Russian fruit.
Ok - so how could you use these things? Ideally, it would be great to cultivate a local demand for these untraditional fruits. But I haven't seen much of a demand yet.
Some ideas:
- Pastured pigs - fed from fruit/nut trees, maybe also from winter beets/turnips ???
- Cidery - crab apples and some of the cold hardy apples make good wine (maybe plus pigs for the excess/groundfall). Ontario has started to have an ever-expanding list of local cider producers.
- Grass fed dairy - Limestone Creamery in Kingston, ON is my inspiration for this one. I think they feed hay for winter. Yes, dairy quota is absurdly expensive, but, if you had 10 dairy farmers...
- Revive the linen industry - flax