Response of nitrogen and phosphorus levels on growth and yield of barley (Hordeum vulgare L.)

A field experiment was conducted during 2024-25 at Agricultural Research Farm, School of Agricultural Sciences, Jaipur National University, Jaipur, Rajasthan to evaluate the “Performance of Barley (Hordeum vulgare L.) as Influenced by Varying Levels of Nitrogen and Phosphorus”. The experiment was laid out in Factorial Randomized Block Design with three replications. The field trial consisted 12 treatments combinations viz., four nitrogen levels (i) control, (ii) 40 kg N ha^-1, (iii) 80 kg N ha^-1 and (iv) 120 kg N ha^-1, while three phosphorus levels viz., (i) control, (ii) 30 kg P₂O₅ ha^-1 and (iii) 60 kg P₂O₅ ha^-1. The result indicted that application of the 120 kg N ha^-1 recorded maximum growth parameters viz., plant height, number of tillers meter^-1 row length, dry matter accumulation (DMA), CGR and RGR; maximum yield attributes and yield viz., spike length (9.92), number of grains spike^-1 (45.47), grain weight plant^-1 (12.50), test weight (43.80 g), grain yield (4175 kg ha^-1), straw yield (5318 kg ha^-1) and harvest index (43.57 of the barley. Moreover, Among the phosphorus levels, the application of 60 kg P₂O₅ ha^-1 gave significantly higher growth parameters viz., plant height, number of tillers meter^-1 row length, DMA, CGR and RGR; maximum yield attributes and yield viz., spike length (9.81), number of grains spike^-1 (44.96), grain weight plant^-1 (12.36), test weight (43.32 g), grain yield (4112 kg ha^-1), straw yield (5403 kg ha^-1) and harvest index (42.81%) of the barley.