Apr 09, 2020 · Calcium, phosphorus, potassium, magnesium, sodium, chloride, and sulfur make up the list of major minerals. Trace minerals include copper, zinc, manganese, selenium, cobalt, iodine, and iron. Hay contains some of the minerals required by horses, but many areas of the country are deficient or low in certain minerals, and the feedstuffs grown .... "/>
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