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Effect of Graded Levels of Magnesium on Dry Matter Production and Yield of Maize Cultivated in Soils of Maize Growing Tracts in Pudukkottai District of Tamil Nadu


                                In order to assess the effect of graded levels of applied magnesium (Mg)(0, 5, 10, 15, 20 and 25 kg ha-1) on the soil available major nutrients, fieldexperiments were conducted in 14 farmer’s holdings at Pudukkottai districtwith hybrid maize (NK 6240) as a test crop. Dry matter production (DMP) ofthe whole plant (above ground) at harvest stage of maize was significantlyinfluenced by the application of 100% NPK + 10 kg Mg ha-1 and recorded thehighest mean as 25620 kg ha-1 at harvest stage. A noticeable increase ingrain and stover yield of maize crop was manifested by applying 100% NPK+ 10 kg Mg ha-1 which recorded the highest mean yield as 11.6 t ha-1 and14.0 t ha-1, respectively. It reported a 14.31 and 22.25 per cent increase ingrain and stover yields, respectively, over control.

Key words : Available magnesium; Graded levels;Critical limit;Maize; Pudukottai

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