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Use dolomite for liming low pH soils which are low in magnesium and calcium. It is not a good choice for California foothill soils which are high in magnesium. Use oystershell lime or mined limestone instead. Rates vary from 1-10 lb/100 sq ft or 500-4,000 lb/acre) depending on soil analysis. This agricultural dolomite has 21.8% calcium, 54.7% calcium carbonate and 11.6% magnesium, 40.2% magnesium carbonate. Its calcium carbonate equivalent is 103%.