A Field experiment was conducted in rabi season in Bhai Gurdas Degree College, Sangrur, Punjab-India during 2021-2022. To find out the suitable dose of Nitrogen in barley crop and to study the time and dose of nitrogen application for higher productivity of barley. The experiment was laid out in split plot design with four levels of nitrogen (0, 20, 40, and 60 kg N ha-1) and three time of application (½ at the time of sowing and ½ after first irrigation, 1/3 at sowing and 2/3 after first irrigation, 1/3 at sowing and 1/3 after first irrigation and 1/3 after second irrigation) with three replications. In all aspects of growth parameters, such as IPP, Plant height, Number of shoots, Dry matter accumulation, and Leaf area index, the nitrogen level (60 kgha-1) treatment and the time of application (1/3 at sowing and 2/3 after first irrigation) treatment were found to be superior to the other treatments (LAI), Treatment N3 (60 kg N ha-1) results in a considerable increase in the number of shoots (393.45).A total amount of rainfall received during the crop season was 56.2 mm and maximum rainfall received during third week of January. The number of shoots m-2 was influenced significantly by rates of nitrogen. Maximum numbers of shoots were recorded under 60 kg N ha-1 at 90 days after sowing. . Maximum plant height was recorded under 60 kg N ha-1 at all the crop growth stages, which was mainly due to more availability of nitrogen. Plant height (70.70 cm), Leaf area index (5.10) & Dry matter accumulation (621.25 g) under main plot treatments. Treatment T2 (1/3 at sowing and 2/3 after first irrigation) was found best with No. of shoots (389.96), Plant height (61.31 cm), Leaf area index (4.46) and Dry matter accumulation (554.94 g) as compared to other treatments and being at par with Treatment T3 (1/3 at sowing and 1/3 after first irrigation and 1/3 after second irrigation) in all aspects of growth parameters.

Keyword: Plant Height, Sowing, Treatment, Irrigation.