has role phosphorus fertilizer fertilizer calcium bis(dihydrogenphosphate) Ca(H2PO4)2 Calcium biphosphate Monobasic calcium phosphate Monocalcium phosphate acid calcium phosphate calcium bis(dihydrogen phosphate) calcium bis(dihydrogenphosphate) calcium dihydrogen orthophosphate calcium superphosphate monocalcium orthophosphate monocalcium phosphate, monobasic phosphoric acid, calcium salt (2:1) primary calcium phosphate calcium phosphate