_____________________________________________________________________________________________________ *Corresponding author: E-mail: shalukumari0017@gmail.com; Current Journal of Applied Science and Technology 39(9): 114-120, 2020; Article no.CJAST.56648 ISSN: 2457-1024 (Past name: British Journal of Applied Science & Technology, Past ISSN: 2231-0843, NLM ID: 101664541) Effect of Weed Management Practices on Weed Control, Yield and Economics of Soybean [Glycine max (L.) Merrill] R. K. Raj 1 , K. K. Sinha 1 , Shalu Kumari 2* , Anup Kumar Choubey 3 , Ashok Pandit 4 and Dinesh Kumar Yadav 1 1 Department of Agronomy, RPCAU, Pusa, Samastipur, Bihar, India. 2 Department of Agronomy, Institute of Agriculture, V.B.U, Santiniketan, West Bengal, India. 3 K.V.K, Aurangabad, Bihar, India. 4 R.R.S, Agwanpur, Saharsa, Bihar, India. Authors’ contributions This work was carried out in collaboration among all authors. Author RKR designed the study, performed the statistical analysis, wrote the protocol and wrote the first draft of the manuscript. Author KKS help in conducting the experiment. Authors SK and AKC managed the analyses of the study. Authors AP and DKY managed the literature searches. All authors read and approved the final manuscript. Article Information DOI: 10.9734/CJAST/2020/v39i930620 Editor(s): (1) Dr. Sunil Kumar Mukherjee, International Centre for Genetic Engineering and Biotechnology, India. Reviewers: (1) Paul Kweku Tandoh, Kwame Nkrumah University of Science and Technology, Ghana. (2) Zvonko Pacanoski, Republic of Macedonia. Complete Peer review History: http://www.sdiarticle4.com/review-history/56648 Received 27 February 2020 Accepted 04 May 2020 Published 13 May 2020 ABSTRACT The experiment was laid out Tirhut College of Agriculture, farm Dholi, Muzaffarpur, Bihar during kharif season 2016, to study the effect of weed management practices on weed control, yield and economics of soybean [Glycine max (L.)]. Hand weeding twice at 25 and 45 DAS was found most effective to control weeds in soybean and recorded lowest weed count, weed dry matter and highest weed control efficiency. Among herbicide, application of Pendimethalin 1.0 kg/ha as PE (Pre- emergance) and Imazethapyr 55 g/ha as PoE (Post-emergance) at 25 DAS was found to be more efficient and cost effective to reduce weed population/m 2 (53.94 & 67.22), dry weight of weeds/m 2 (21.16 & 45.86 g) an increased weed control efficiency (53.86 & 68.83%) significantly in both the stages 30 and 60 DAS. Beside it, Pendimethalin 1.0 kg/ha + Imazethapyr 55 g/ha at 25 DAS, Original Research Article