I'd be concerned about excessive sulfur and possibly molybdenum levels adversely affecting copper uptake by plants...and subsequently exacerbating possible copper deficiency in animals grazing that ground.
Seems like I recall Dr. Bob Van Saun, from U.Penn. providing a case report of a trainwreck involving a father/daughter sheep operation, where the father was using regular ag lime, but the daughter had purchased and spread some cheap refining/mining byproduct sold as a 'liming agent'... that caused a tremendous loss of lambs and ewes... while those on Dad's place, next door, were just fine.
