The magnesium (Mg) in dolomite limestone has a 30% absorption coefficient (Dairy NRC 2001) compared to magnesium oxide at 70% and magnesium sulfate at 90%.
Mike Hutjens, Extension Dairy Specialist, University of Illinois - Illini DairyNET
FAQ #25679
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Where can I find information on the values of dolomite as a source of magnesium for dairy cattle and its biological availability?
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