Epsom Salt (MgSO4 • 7H2O )or magnesium sulfate, is used where magnesium deficiencies occur in already alkaline conditions.
Epsom Salt contains 9.8 percent magnesium and 13 percent sulfur. In acidic soil that needs to have its pH raised, dolomite is a better source of Mg. Bulk density of Epsom Salt is 60.5 lbs./ft3 and the chemical formula is MgSO4 • 7H2O.
Epsom Salt is readily soluble in water.
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