_____________________________________________________________________________________________________ *Corresponding author: E-mail: balajinaikbanoth789@gmail.com; Current Journal of Applied Science and Technology 39(32): 43-54, 2020; Article no.CJAST.61672 ISSN: 2457-1024 (Past name: British Journal of Applied Science & Technology, Past ISSN: 2231-0843, NLM ID: 101664541) Optimization of Nitrogen Dose under Different Irrigation Levels in Maize (Zea mays L.) during Post Monsoon Season at Rajendranagar, Hyderabad, India B. Soujanya 1 , B. Balaji Naik 2* , M. Uma Devi 1 , T. L. Neelima 1 and Anima Biswal 3 1 Water Technology Center, PJTS Agricultural University, Rajendranagar, Hydearbad, India. 2 Agro Climate Research Center, PJTS Agricultural University, Rajendranagar, Hydearbad, India. 3 National Remote Sensing Centre, ISRO, Balanagar, Hyderabad, India. Authors’ contributions This work was carried out in collaboration among all authors. Author BS designed the study, performed the statistical analysis, wrote the protocol and wrote the first draft of the manuscript. Author BBN mentored and monitored the work. Authors AB, MUD and TLN managed the analyses of the study. All authors read and approved the final manuscript. Article Information DOI: 10.9734/CJAST/2020/v39i3231000 Editor(s): (1) Dr. Chen Chin Chang, Hunan Women’s University, China. Reviewers: (1) Habtamu Zeleke, Haramaya University, Ethiopia. (2) Sri Winarni, Padjadjaran University, Indonesia. Complete Peer review History: http://www.sdiarticle4.com/review-history/61672 Received 01 August 2020 Accepted 06 October 2020 Published 21 October 2020 ABSTRACT A field experiment was conducted at Agro Climate Research Center, Rajendranagar, Hyderabad, India during post monsoon season of 2019-20 with an objective to optimize the nitrogen dose under varied degrees of water stress environment. The experiment was laid out in split plot design replicated thrice with three irrigation scheduling (60%DASM, 40%DASM and 20%DASM) as main plots and three nitrogen levels (90, 180 and 240 kg of nitrogen ha -1 ) as sub plots. The results indicated that, at 20% DASM, with increasing nitrogen dose from 90 to180 and further 240 kg ha -1 , the plant height and biomass increased significantly. Whereas a significant response in terms of the LAI, number of grains row -1 , grain and stover yields and nitrogen uptake by plant was observed up to 180 kg N ha -1 .Under deficit soil moisture condition (60% DASM) the maximum plant height (141.5cm), LAI (2.93), biomass (222.3 g plant -1 ), number of grains row -1 (35.3) test weight (24.1 g), Original Research Article