My time on the farm spanned the loose hay era and the "square" bale era.
This piece on New Holland Haymakers is interesting, a very new world. The idea of chopping hay down to 3 inches, both for the cows and to make the bale more dense to save freight costs? And I'm surprised by the relatively low cost. I wonder if round bale balers are simpler than the old square balers, seems as if they should be.