That's why heritage seeds are so important. They are the ones that our grandparents and great-grandparents used to use....natural seeds for natural plants.
We didn't grow that stuff even when I was a kid in the 60's. Those seeds only yielded 50 to maybe, at most, 100 bushles per acre.
Today, on the very same ground, with similar inputs of fertilizer, and less inputs of fuel and herbicides, they now grow 150 to 250 busheles per acre.
This isn't to denigrate heritage seeds, but the idea that they were some kind of magical seed is silly.