Active ingredient: Total nitrogen (N) 13.0%, phosphorus pentoxide (P2O5) water-soluble 40.0%, potassium oxide (K2O) water-soluble 13.0%, boron (B) water-soluble 0.02%, copper (Cu) water-soluble and chelated (EDTA) 0.005%, iron (Fe) water-soluble 0.07%, manganese (Mn) water-soluble 0.03%, zinc (Zn) water-soluble 0.01%

Master 13-40-13 is a fertilizer rich in phosphorus and a number of microelements, which also contains iron (EDTA) and manganese (EDTA).