In order to assess the response of maize to applied Mg (0, 5, 10, 15, 20 and 25 kg ha-1 ) for arriving at the optimum Mg level for this crop and to fix the critical limit of Mg, field experiments were conducted in 14 farmer’s holdings at Pudukkottai district with Hybrid Maize (NK 6240) as a test crop by adopting the Cate and Nelson graphical and statistical (analysis of Variance method) method of critical limit fixation. | Fixation of critical level of available magnesium in soils of maize growing tracts of pudukkottai district of Tamil Nadu, India
