_____________________________________________________________________________________________________ *Corresponding author: E-mail: gbaralesidike@gmail.com; Journal of Experimental Agriculture International 43(2): 9-20, 2021; Article no.JEAI.66706 ISSN: 2457-0591 (Past name: American Journal of Experimental Agriculture, Past ISSN: 2231-0606) Effect of Seedbed Types and time of Vine Harvesting on Shoot and Tuber Yields of Sweet Potato [Ipomoea batatas (L.) Lam.] in South-south, Nigeria Lesi Dike Gbaraneh 1* and Victoria Wilson 2 1 Institute of Agricultural Research and Training, Rivers State University, Port Harcourt, Nigeria. 2 Department of Plant Science and Biotechnology, Rivers State University, Port Harcourt, Nigeria. Authors’ contributions This work was carried out in collaboration between both authors. Authors LDG and VW designed the study, performed the statistical analysis, wrote the protocol and wrote the first draft of the manuscript. Authors LDG and VW managed the analyses of the study. Authors LDG and VW managed the literature searches. Both authors read and approved the final manuscript. Article Information DOI: 10.9734/JEAI/2021/v43i230640 Editor(s): (1) Professor. Daniele de Wrachien, University of Milan, Italy. Reviewers: (1) Sunil Kr. Verma, Banaras Hindu University, India. (2) Huda Ahmed Ibrahim, National Research Centre, Egypt. Complete Peer review History: http://www.sdiarticle4.com/review-history/66706 Received 17 January 2021 Accepted 25 March 2021 Published 08 April 2021 ABSTRACT A field experiment was conducted at Rivers Institute of Agricultural Research and Training (RIART), Rivers State University, Port Harcourt, Nigeria with the objective of evaluating the influence of seedbed types and vine harvesting time on shoot and tuber yields of sweet potato and make recommendations for optimal and sustainable production. The treatments consisted of three seedbed types (ridge, flat, and mound), and four vine harvesting time (8, 12, 16 and 20 weeks after planting). The experiment was laid out as a 3 x 4 in factorial arrangement fitted into a randomized complete block design (RCBD) and replicated three times. The results revealed that planting of sweet potato on ridge produced the highest root tuber yield followed by mound seedbeds; planting on flat seedbed produced the highest shoot (vine) and lowest tuber yields. While planting on ridge seedbed and harvesting the vines 16 weeks after planting (when about 80% of the growth phase of the plant was completed) produced optimum shoot yield which could be used as fodder with no significant effect on root tuber yield. In general, vine harvesting during active growth phase of the sweet potato Original Research Article