K (Mg, S) 40 (5:12)
magnesium sulphate Mg : S 18 : 38
P (Ca, S) 19 (10:28)
NPK (Ca, S) 4:11:11 (7:27)
PK (Ca, Mg, S) 10:20 (5:4:15)
NPK (Ca, Mg, S) 5:10:25 (2,5:2:13)