In 1964, my Daddy put down a good deal of chemical fertilizer. We
had pretty good pastures and they instantly went to 'lush green
fields' he was pleased. But it made him 'sick as a dog' to handle
the stuff, and we ended up having to buy hay mid summer because
the cows wouldn't eat any of it. They were up to their bellies in
'showplace green' and wouldn't touch the stuff.
That was the last and only time anything has been added that
came out of a bag. If the cows didn't want it, I didn't see any point
in it.