Libraries at University of Nebraska-Lincoln



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Objective - This paper reports the findings from a study designed to investigate the following traits on white guinea yam publications for fifteen years: information outlets, trend of scientific productivity, degree of author’s collaboration, prolific authors and their institutional affiliations, journal bibliographic coupling and co-citation analysis. The main aim of the paper is to examine patterns in yam research literature with a view to enhancing the development of yam production research by collating indexed information.

Methods - Scholarly citation data of yam production literature on Sub-Saharan Africa from AGORA and TEEAL databases between 2003 and 2017 were collected. Network analysis and descriptive bibliometric research design was adopted to analyse the citation data of yam production literature on Sub-Saharan Africa listed in AGORA and TEEAL. The data obtained was analysed using frequency and percentages, co-citation analysis and bibliographic coupling. VOS viewer was used for bibliographic coupling and co-citation analysis.

Results - Findings showed that journal articles are published more in journals (93.5%) than other outlets. Collaboration index was 0.8% which indicates that 80% journal articles were written by 2 or more authors. Journal articles are mostly published in Nigeria Agricultural Journal (21 articles) and the citation network contains 36 items (authors) with 11 clusters and a total link strength of 136. The journal bibliographic coupling citation network contains 8 items (journals) including journals with 3 clusters, 8 links and a total link strength of 31. Food Chemistry, Soil and Tillage Research and Field Crops Research which were journals published in Netherlands have the highest ranking JIF (above 3.0) and H-Index (between 109 and 204). Publications from Economics of production accounted for 40 articles (31 journals, 6 reports and 3 Technical Notes).

Conclusion – The study has been able to identify the principal forms of sources; degree of author’s collaboration; first 25 prolific authors; geographical location of journals; top 20 journals; study areas of publications; trend of scientific productivity; impact factors and H-index of publication outlets; institutional affiliations of authors; co-cited authors; and co-cited journals in Sub-Saharan yam literature listed in AGORA and TEAL databases between 2003 and 2017.



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