Yield and yield components of wheat as affected by different seed rates and nitrogen levels

An experiment was conducted to study yield and yield components of wheat under different seed rates and nitrogen levels.Five seed rates (S1 = 60 kg ha -1 , S2 = 80 kg ha -1 , S3 = 100 kg ha -1 , S4 = 120 kg ha -1 and S5 = 140 kg ha -1 ) and five nitrogen levels (N0 = Control, N1 = 40 kg ha -1 , N2 = 80 kg ha -1 , N3 = 120 kg ha -1 and N5 = 140 kg ha -1 ) were tested in the experiment.Results showed that maximum tillers m -2 (334), leaf area index (4.50),grains spike -1 (60), 1000-grains weight (41.91 g), grain yield (3957 kg ha -1 ) and biological yield (10172 kg ha -1 ) was produced by the plots seeded with 120 kg ha -1 .Similarly nitrogen fertilization at the rate of 120 kg ha -1 resulted maximum (348) tillers m -2 , leaf area index (4.42)grains spike -1 (63), 1000-grain weight (42.19 g), grain yield (4145 kg ha -1 ) and biological yield (10579 kg ha -1 ).In case of interaction between seed arte and nitrogen it was observed that maximum tillers m - 2 , leaf area index, grains spike -1 , 1000-grain weight, grain yield and biological yield was produced by plots received seed at the rate of 120 kg ha -1 and nitrogen with 120 kg ha -1 , while maximum leaf area index was recorded from the plots seeded with 120 kg ha -1 and fertilized with 80 kg N ha -1 . Key words: Wheat; Seed rates; Nitrogen levels; Yield and yield components