I checked the YARA nutrients, they have nice products,
i worked on the composition of the YARA KRISTALON RED 12-12-36
12-12-36 expressed in N-P205-K20
equivalent to 12-5,2-30 in N-P-K
i found that :
600 g potassium nitrate
110 g ammonium nitrate
220 g monopotassium phosphate
15 g potassium...