Preparation of a modified flue gas desulphurization residue and its effect on pot sorghum growth and acidic soil amelioration

► A modified flue gas desulphurization residue (MFGDR) as acidic soil ameliorant. ► The MFGDR contains K, Mg, Ca, Si, S nutrient elements and displays slightly alkaline. ► The pot experiment indicated that the MFGDR could increase the sorghum growth and ameliorate the acidic soil.