_____________________________________________________________________________________________________ *Corresponding author: E-mail: bhunes99@gmail.com; Journal of Experimental Agriculture International 33(3): 1-6, 2019; Article no.JEAI.47227 ISSN: 2457-0591 (Past name: American Journal of Experimental Agriculture, Past ISSN: 2231-0606) Effect of Plant Spacing on Growth and Yield of Rice (Oryza sativa L.) under Submerged Condition Bhuneshwar Verma 1* , L. K. Ramteke 1 and M. Shahid 2 1 College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya (C.G.), India. 2 National Rice Research Institute, Cuttack, Odisha, India. Authors’ contributions This work was carried out in collaboration among all authors. Author BV designed the study, performed the statistical analysis, wrote the protocol and wrote the first draft of the manuscript. Authors LKR and MS managed the analyses of the study. Author MS managed the literature searches. All authors read and approved the final manuscript. Article Information DOI: 10.9734/JEAI/2019/v33i330142 Editor(s): (1) Dr. Rusu Teodor, Professor, Department of Technical and Soil Sciences, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, Romania. (2) Dr. Peter A. Roussos, Assistant Professor, Lab. Pomology, Agricultural University of Athens, Greece. (3) Dr. Abdel Razik Ahmed Zidan, Professor, Hydraulics and Water Resources, Mansoura University, Egypt. Reviewers: (1) Dr. Mohd Hafiz Ibrahim, Universiti Putra, Malaysia. (2) Addam Kiari Saidou , Natural Ressources Management, International Institute of Tropical Agriculture (IITA), Oyo Road, Ibadan, Nigeria. (3) Wanderson de Sousa Mendes, University of São Paulo, Piracicaba, São Paulo, Brazil. (4) Bakari A. Mrutu, Tanzania Official Seed Certification Institute (TOSCI) Tanzania. Complete Peer review History: http://www.sdiarticle3.com/review-history/47227 Received 02 January 2019 Accepted 17 March 2019 Published 30 March 2019 ABSTRACT The experiment was conducted to find out the effect of plant spacing on the performance of rice variety IR-64 and IR64-Sub1 under conventional and Submerged condition at the National Rice Research Institute (NRRI), Cuttack, Odisha during the Rabi season of 2018. Different planting densities were maintained using different spacing's. These include (S 1 ) 15 cm × 10 cm, (S 2 ) 15 cm × 20 cm. The experiment was laid out in a randomized complete block design with 3 replications spacing of 15 cm × 10 cm with produced the highest grain yield of 350 gm -2 in submerged condition on IR64-Sub1 rice cultivar, which was significantly higher than the yield with recommended density (15 cm × 10 cm with IR64 Sub1). This yield was increased due to higher number of panicles m -2 . This result suggests that higher planting density (15 cm×10 cm) rather than increased number of seedling hill -1 is necessary for getting higher yield of IR-64Sub1 rice cultivar in continuous submerged condition (where V 1 =IR 64, V 2 =IR-64 Sub1, S 1 =15 cm×10 cm, S 2 =20 cm×15 cm). Short Research Article