Vol. 7, Issue 9, Part F (2025)

A field experiment was conducted during Rabi season of 2022-23 at Agricultural Research Farm, Department of Agronomy, R.B.S. College, Bichpuri, Agra (U.P.) the investigation entitled ‘Enhancing nutrient use efficiency through nano-fertilizer in Barley (Hordeum vulgare L.)’. The variables involved in this study were T1 (Control (P+K) only),T2 (Control (P+K) only+ 1000 ml NN/ha at 30-35 DAS+1000 ml NN/ha at 60-65 DAS), T3 (50% RDN+500 ml NN/ha at 30-35 DAS+500 ml NN/ha at 60-65 DAS), T4 (50% RDN+1000 ml NN/ha at 30-35 DAS+1000 ml NN/ha at 60-65 DAS), T5 (75% RDN+500 ml NN/ha at 30-35 DAS+500 ml NN/ha at 60-65 DAS), T6 (75% RDN+1000 ml NN/ha at 30-35 DAS+1000 ml NN/ha at 60-65 DAS), T7 (RDN+500 ml NN/ha at 30-35 DAS+500 ml NN/ha at 60-65 DAS), T8 (RDN+1000 ml NN/ha at 30-35 DAS+1000 ml NN/ha at 60-65 DAS) and T9 (Recommended doses of fertilizers). These 9 treatments were compared in a “Randomized Block Design” with three replications. The experimental result revealed that 100% RDN (@ 60 kg ha-1) when applied with two spray of nano-nitrogen fertilizer @1000 ml ha-1 at 30-35 and 60-65 DAS (T8) played a vital role for overall improvement in crop growth and development and the maximum grain yield (56.88 q ha-1) and maximum net return was obtained with crop fertilized with 100% RDN + two foliar sprays of nano-nitrogen fertilizer @1000 ml ha-1 at 30-35 and 60-65 DAS followed by T7 (100% RDN + foliar spray of nano-nitrogen fertilizer @ 500 ml ha-1 at 30-35 and 60-65 DAS). The maximum net return ₹ 120448 ha-1 and B:C ratio (3.71) were also obtained.