The bibliometric data employed to calculate citation-based metrics for this ranking were collected on January 12, 2026. A scientist’s position within the ranking is determined by their D-index (Discipline H-index), a refined metric that exclusively incorporates publications and citation data pertinent to the examined discipline. This approach ensures the evaluation accurately reflects a researcher’s impact within the specific field of Plant Science and Agronomy.
Scope of Research Considered
The ranking is based on an extensive review of 279,971 scientist profiles identified from a diverse array of bibliometric data sources, covering all disciplines. Specifically, for the field of Plant Science and Agronomy, 1,000 scientists were scrutinized in detail.
To qualify for inclusion, a scientist’s D-index had to reach at least 30, with the majority of their tier publications falling within the domain of Plant Science and Agronomy. In addition, a researcher’s awards and notable achievements in the discipline were incorporated as supplementary evaluation factors.
The D-index threshold for identifying top researchers is adjusted in increments of 10, corresponding to the estimated total number of scholars in each discipline. This graduated threshold ensures that the top 1% of leading scholars within the field are incorporated into the ranking. Furthermore, a proximity of 30% or less between a scientist’s general H-index and their D-index is required, maintaining coherence between their overall and discipline-specific impact.
Additional Verification Practices
Recognizing that raw bibliometric data alone cannot definitively represent the scholarly impact of researchers, the team behind this ranking implemented stringent verification practices. All scientist profiles were manually reviewed and cross-correlated against publications listed in reputable and trustworthy sources to confirm data accuracy and integrity.
While not a direct factor affecting rank positioning, the volume of papers published in prominent journals and conference proceedings serves as a valuable secondary indicator of a scientist’s contribution to their particular research area.
The final ranking positions are established using each researcher’s D-index calculated from data extracted mainly from OpenAlex and CrossRef, the foremost bibliometric databases known and trusted within the global research community.
For those interested in a more comprehensive explanation of the methodology applied, please visit our methodology page.
Research.com’s Mission Behind the Ranking
At Research.com, our mission is to motivate researchers, academic institutions, companies, and policymakers worldwide to closely examine the directions in which leading experts are advancing the frontiers of their fields. By providing a transparent and meticulously curated overview of top researchers, we enable the broader scientific community to identify and connect with recognized leaders across specific disciplines, countries, and institutions.
This ranking embodies a commitment to fostering greater visibility, collaboration, and recognition within the Plant Science and Agronomy community in Tanzania and beyond, thereby supporting informed decision-making and strategic research initiatives.
