Dhaka, A. K.Sharma, Amit2022-12-022022-12-022021-06https://krishikosh.egranth.ac.in/handle/1/5810190235A field experiment entitled “Optimization of seed rate and nitrogen dose for dual purpose barley” was conducted during Rabi season 2019-20 at wheat and barley section research area of CCS Haryana Agricultural University, Hisar. The experiment was comprised of three nitrogen doses (N1-60, N2-75 and N3- 90 kg N/ha) as main plot treatments and four seed rates (S1- 87.5, S2- 100, S3- 112.5 and S4-125.0 kg/ha) as sub plot treatments. Experiment was laid out in split plot design with four replications. Based on the research investigation, it was found that nitrogen dose and seed rate both had significantly influenced the growth, yield attributes, yield and economics of dual purpose barley. Among nitrogen doses, 90 kg/ha being at par with 75 kg/ha recorded significantly higher grain yield (4895 kg/ha), biological yield (12220 kg/ha), green fodder yield (3706 kg/ha), net return (₹ 36,589/ha) and B:C (1.57) which were 9.7, 12.0, 15.1, 41.4 and 11.3 percent higher than nitrogen dose of 60 kg/ha, respectively due to higher yield attributes i.e. number of effective tillers (85.08), number of grains per spike (44.15), number of spikelets per spike (23.10), spike length (7.47) and test weight (37.82) with nitrogen dose 90 kg/ha which were 8.5, 5.1, 7.9, 11.4 and 4.8 percent higher than nitrogen dose of 60 kg/ha, respectively. Increase in number of days taken to booting, heading and maturity was recorded with increase in nitrogen doses from 60 to 90 kg/ha. Among seed rates, 125.0 kg/ha closely followed by 112.5 kg/ha recorded significantly higher effective tillers (85.11), grain yield (4922 kg/ha), biological yield (12181 kg/ha), green fodder yield (3729 kg/ha), net return (₹ 34,937/ha) and B:C (1.54), which were 8.0, 11.0, 11.8, 16.7, 25.4 and 6.2 per cent higher than seed rate of 87.5 kg/ha, respectively. So, to obtain higher yield and economic returns for dual purpose barley (green fodder cut at 55 DAS and left after that for grain production), variety BH 946 should be sown using optimum seed rate of 125.0 kg/ha and nitrogen dose of 90 kg/ha.EnglishThesis