Fertilizers; mineral or chemical, phosphatic

310311 Fertilizers, mineral or chemical; phosphatic, superphosphates, containing by weight 35% or more of diphosphorus pentaoxide (P2O5) 310319 Fertilizers, mineral or chemical; phosphatic, superphosphates, other than containing by weight 35% or more of diphosphorus pentaoxide (P2O5) 310390 Fertilizers, mineral or chemical; phosphatic, n.e.c. in heading no. 3103