C05B PHOSPHATIC FERTILISERS Subclass indexesSUPERPHOSPHATES1/00PRODUCED BY WET TREATMENTS11/00PRODUCED BY PYROGENIC PROCESSES13/00OTHER INORGANIC FERTILISERS3/00-9/00, 17/00ORGANIC FERTILISERS15/00, 17/00GRANULATION; PELLETISATION19/00MIXTURES OF PHOSPHATIC FERTILISERS21/00