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 [RC] Magnesium...alfalfa vs.grass hay - Naomi PrestonRegarding alfalfa hay, it does have a higher magnesium content 
(.30%) vs.  grass hay (.20%).  (Analysis from Dairy One 
labs.2007 hay crop averages).  However. alfalfa  is very high in 
calcium, and high calcium (or high phosphorus) may interfere with magnesium 
absorption.   
Naomi Preston 
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