This map shows the geographic impact of R. M. Sonoda's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by R. M. Sonoda with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites R. M. Sonoda more than expected).
This network shows the impact of papers produced by R. M. Sonoda. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by R. M. Sonoda. The network helps show where R. M. Sonoda may publish in the future.
Co-authorship network of co-authors of R. M. Sonoda
This figure shows the co-authorship network connecting the top 25 collaborators of R. M. Sonoda.
A scholar is included among the top collaborators of R. M. Sonoda based on the total number of
citations received by their joint publications. Widths of edges
represent the number of papers authors have co-authored together.
Node borders
signify the number of papers an author published with R. M. Sonoda. R. M. Sonoda is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Fujita, Yuichi, R. M. Sonoda, & Hiroshi Yaegashi. (1990). An improved method for conidial formation of false smut fungus.1 indexed citations
10.
Sonoda, R. M., et al.. (1990). Fungi in Rio Grande gummosis lesions and patterns of gummosis-affected grapefruit trees in Indian river area groves.. 103. 59–61.1 indexed citations
Stoffella, Peter J. & R. M. Sonoda. (1984). Influence of number and arrangement of missing plants on tomato yields. Tropical Agriculture. 61(4). 317–319.2 indexed citations
Sonoda, R. M., et al.. (1980). Resistance of Desmodium heterocarpon and other tropical legumes to root-knot nematodes.. Tropical grasslands. 14(2). 115–120.1 indexed citations
16.
Lenné, J. M. & R. M. Sonoda. (1978). Occurrence of Colletotrichum dematium f.sp. truncata on Stylosanthes spp.. The Plant disease reporter. 62(7). 641–644.8 indexed citations
17.
Sonoda, R. M.. (1973). Occurrence of a Pythium disease in virgin sandy soils of South Florida associated with a new method of field seeding tomatoes.. The Plant disease reporter. 57(3). 260–261.1 indexed citations
18.
Sonoda, R. M.. (1973). Pythium fruit rot of tomatoes.. The Plant disease reporter. 57(8). 638–639.1 indexed citations
19.
Sonoda, R. M.. (1972). Control of tomato transplant damp-off. The Plant disease reporter.1 indexed citations
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive
bibliographic database. While OpenAlex provides broad and valuable coverage of the global
research landscape, it—like all bibliographic datasets—has inherent limitations. These include
incomplete records, variations in author disambiguation, differences in journal indexing, and
delays in data updates. As a result, some metrics and network relationships displayed in
Rankless may not fully capture the entirety of a scholar's output or impact.