*Corresponding Author: arunabha@cutm.ac.in 91 DOI: https://doi.org/10.52756/ijerr.2024.v44spl.008 Int. J. Exp. Res. Rev., Vol. 44: 91-101 (2024) Dynamics of Weed and Productivity in Summer Green Gram (Vigna radiata L.) by Using Different Nitrogen Levels and Weed Control Techniques in South-Eastern Odisha Koushik Sar 1 , Arunabha Pal 2 *, Md. Riton Choudhury 1 , Chunchu Suchith Kumar 3 , Pilli Manasa 4 , Subhashree Sarangi 1 , Nayan Kishor Adhikary 5 and Priyanka Nandi 6 1 Department of Agronomy, FAS, Siksha ‘O’ Anusandhan, Bhubaneswar, Odisha, India; 2 Centurion University of Technology and Management, Odisha, India; 3 Department of Agronomy, School of Agriculture, SR University, Warangal, Telangana, 506371, India; 4 K.L. College of Agriculture, K. L. University, Andhra Pradesh, India; 5 School of Agricultural Sciences, Nagaland University, Nagaland, India; 6 Rabindra Nath Tagore Agriculture College, Birsa Agricultural University, Ranchi, Jharkhand, India E-mail/Orcid Id: KS, koushiksar1@gmail.com, https://orcid.org/0000-0002-7754-2663; AP, arunabha@cutm.ac.in, https://orcid.org/0000-0003-2654-0489; MRC, md.riton@gmail.com, https://orcid.org/0000-0001-7309-4886; CSK, iamsuchithkumar@gmail.com, https://orcid.org/0009-0004-4734-3796; PM, pmanasa@kluniversity.in, https://orcid.org/0000-0001-7727-4972; SS, subhasubhashree1999@gmail.com, https://orcid.org/0009-0002-0126- 1221; NKA, nayan.bckv@gmail.com, https://orcid.org/0000-0003-4241-6090; PN, priyanka20bau@gmail.com, https://orcid.org/0009-0006-2347- 6871 Introduction A contributing factor to the reduction in green gram yield is farmers' uneven fertilizer application, which degrades the soil and turns it unfertile and unfit for future cultivation (Biswas and Ghosh, 2016; Banerjee et al., 2021). Farmers normally use common chemical fertilizers because they are unaware of the nutrients and soil productivity their crops need. A proper fertilization management plan based on soil productivity evaluation can improve soil health (Dhakal et al., 2016; Majumder et al., 2020; Yohannes et al., 2024). Green gram is often referred to as a source of protein under food variation. As well as it can fix symbiotic nitrogen, which improves soil fertility and water use efficiency (Thakur et al., 2021). Legume cultivation has many benefits for the growing of plants and the environment. In addition, weed is one of Article History: Received: 14 th May., 2024 Accepted: 18 th Oct., 2024 Published: 30 th Oct., 2024 Abstract: A field experiment was carried out at ARS, Faculty of Agricultural Sciences, SOADU, Bhubaneswar, on Dynamics of weed and productivity in summer Green Gram (Vigna Radiata L.) by using different nitrogen levels and weed control techniques in south-eastern Odisha during summer, 2022. The experiment was conducted in split plot design with three replications comprising fifteen treatment combinations. The main plot had three levels of nitrogen, and the sub-plots used five weed control methods. The most prevalent weeds in the experimental plots were Poa annua, Digitaria sanguinalis, Echinochloa colona, Cleome viscose, Ageratum conyzoides, Portulaca oleracea and Melochia corchorifolia. According to the result, dry weight and weed density obtained for each crop growth stage were lower under 75% nitrogen. Similarly, two-hand weeding at 15 and 30 days after sowing reduced dry weight and weed density to the lowest level that was on par with ready-mix of pendimethalin + imazethapyr @ 0.75 kg ha -1 pre-emergence control. Similar to 100 % N application and maximum growth in terms of all yield parameters was observed under 125% nitrogen. In terms of weed control, pre-emergence treatment of the ready- mix herbicide was closely followed by two-hand weeding at 15 and 30 days after sowing, which produced the maximum seed yield (930.56 kg ha -1 ) and stover yield (2397.11 kg ha -1 ) for green gram. In comparison to the plots receiving two hand weeding and a ready-mix herbicide treatment, the seed yield in the untreated weed plots was 51.70 and 50.88% lower, respectively. Keywords: Green gram, Weed flora, Seed yield, Herbicides, Pendimethalin, Imazethapyr How to cite this Article: Koushik Sar, Arunabha Pal, Md. Riton Choudhury, Chunchu Suchith Kumar, Pilli Manasa, Subhashree Sarangi, Nayan Kishor Adhikary and Priyanka Nandi (2024). Dynamics of Weed and Productivity in Summer Green Gram (Vigna radiata L.) by Using Different Nitrogen Levels and Weed Control Techniques in South-Eastern Odisha. International Journal of Experimental Research and Review, 44, 91-101. DOI: https://doi.org/10.52756/ijerr.2024.v44spl.008