Field trial was conducted on horticultural farm of Lamjung Agriculture Campus, Lamjung, Nepal(latitude: 28.125896; longitude: 84.416133 and altitude: 630.02m) between October-January 2017/18 on radish following single factorial Randomized Complete Block Design with four replications and five treatments. Different dose of Nitrogen viz.50%, 75%, 100%, 125% and 150% of government recommended dose were evaluated for their field efficacy in growth and yield attributes of Radish. Government recommended dose of NPK is 200:180:60kg/ha respectively (Krishi Diary 2074). Full dose of P and K while 50% of N was supplied during sowing while remaining N was supplied in equal proportion in 30 and 45days after sowing. 1.28kg well rotten farm yard manure (Krishi Diary 2074) was applied per plot before sowing. Irrigation was applied frequently during germination period and after this period, scheduled in the intervals viz. 3days and 5days as per the soil moisture condition. Plots were partitioned at the distance of 50cm. The radish cultivar Minow Early, widely grown in this locality was used for the trial. The plot size was maintained at 0.8×0.8m holding 16 plants per plot keeping row to row distance as 20cm and plant to plant distance 20cm. 4 plants per plot were under observation. Different growth and yield parameters were recorded. Plant height was taken from the point of root attachment to the top of the leaves. Root length was recorded by measuring the length of white part of root and the means were worked out and expressed in centimeter. Root girth refers to the average width at the widest point in the middle portion of mature root. Root weight was taken with the help of weighing balance. The **data** were analyzed statistically using computer package program SPSS version16.0 and R-STAT. Homogeneity test was conducted. Mean separation was done using Least Significant Difference (LSD) and Duncan's Multiple Range Test(DMRT) at 5% significance level. ANOVA were done at 1% and 5% level of significance or mean comparison. The correlation between root length and N level, plant height and N level were calculated and graphed using SPSS.