UFA stands for United Farmers of Alberta. It's basically a store where you can go to get farm supplies. Need a water trough? Go to UFA. Need a bit for your horse? UFA. Dry wall hammer? UFA again. They sell tools, animal paraphenelia, building supplies, fencing materials, and so on. They also sell prefabricated buildings, such as barns and toolsheds and the like.
Rememeber, you don't have to be a farmer to shop at UFA.