Generic Materials Search: phosphate rock

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Calcium – nonsynthetic
Allowed with Restrictions
Livestock Feed Ingredients, Livestock Health Care
May be supplied by: calcite, chalk, rock, ground clam shells, gypsiferous shale, ground limestone, dolomitic limestone, oyster shell flour, ground phosphate rock, soft phosphate rock, or shell flour. May not be fed in amounts above those needed for adequate nutrition and health maintenance for the species at its specific stage in life.
205.237(a) & 205.237(b)(2)
Phosphate Rock
Crop Fertilizers and Soil Amendments
Must not be fortified or processed with synthetic chemicals. Includes colloidal phosphate rock. See also MINED MINERALS – UNPROCESSED.
205.203(d)(2) A mined substance of low solubility.