The document discusses different types of phosphatic fertilizers including their manufacturing processes and properties. It describes how phosphoric acid is produced through wet and furnace processes and used to manufacture superphosphates like single super phosphate (SSP) and triple super phosphate (TSP) by treating rock phosphate with sulfuric acid. Complex fertilizers like monoammonium phosphate (MAP) and diammonium phosphate (DAP) are also produced by reacting phosphoric acid and ammonia. The document provides details on the specifications and production of various phosphatic fertilizers used in India.