Rock Phosphate; mineral fertilizer, finely ground, spread on acid soils
Superphosphate; containing 20% phosphate, results from the reaction of rock phosphate with sulfuric acid
Treble Superphosphate; 46% phosphate, treated rock phosphate
Phosphoric Acid; 53% phosphate, highly corrosive liquid in ure form, used to prepare fluid fertilizers
Ammonium phosphates; made by mixing phosphoric acid with ammonia, make MAP and DAP.
Bone Meal and Manure; organic sources of phosphate.
Phosphorus fertilizers are obtained by the mining of rock phosphate in Florida and other states.
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