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Abstract
Extract
Madam:– Magnesium has been identified as an important mineral in the nutrition of dairy eows and reeent findings in New Zealand(Citation1) emphasize this importance. For example, a large survey of dairy animals(Citation2) showed one-third of almost one million cows could be suffering from hypomagnesemia. A separate survey (Citation3)> involving 76 farms estimated that supplementing with magnesium to prevent hypomagnesemia would have produced a net benefit of between $1,600 and $4,250 per farm. The cost/benefit ratio was remarkably high and ranged from 11–28.