Data Sources and Citation Metrics
The 5th edition of the Research.com Best Plant Science and Agronomy Scientists in the United States Ranking is primarily built upon bibliometric data extracted from OpenAlex and CrossRef, supplemented by multiple additional reputable data sources. These sources collectively provide comprehensive coverage of academic publications, citations, and related metadata, allowing for an accurate and robust analysis of scientific output.
All bibliometric data used to devise citation-based metrics for this ranking were collected on January 12, 2026. A scientist’s position in the ranking is determined by their D-index (Discipline H-index), a refined bibliometric measure that includes only those publications and corresponding citation metrics within the specific discipline of Plant Science and Agronomy, ensuring discipline-specific relevance and fairness in evaluation.
Scope of Research and Eligibility Criteria
The ranking process examined a total of 279,971 scientist profiles spanning all scientific disciplines, with a focused subset of 1,567 researchers identified specifically within Plant Science and Agronomy. To qualify for inclusion, a scientist was required to have a D-index of at least 30. Furthermore, a majority of their tier publications—those considered most influential and impactful—had to be within the domain of Plant Science and Agronomy. Awards and notable achievements in this field were also taken into consideration to support the evaluation of academic excellence.
The threshold for the D-index is adaptively set in increments of 10 based on the estimated total number of scholars in each discipline, thus ensuring that the top 1% of leading researchers are incorporated into the ranking. Additionally, a proximity criterion is maintained where the difference between a scientist’s general H-index and their D-index does not exceed 30%, which guarantees a focused assessment on discipline-specific contributions while acknowledging overall scholarly impact.
Verification and Validation Practices
Understanding that raw bibliometric data alone cannot provide an absolute measure of a researcher’s output, all scientist profiles included in the ranking were subjected to meticulous manual verification. This process involved cross-correlation against publications listed in wide-ranging, trustworthy academic sources to validate the accuracy and relevance of their scholarly contributions.
While the positioning in the ranking is exclusively determined by the D-index derived from OpenAlex and CrossRef, the number of papers published in prominent journals and leading conference proceedings serves as a valuable secondary signal of a scientist’s influence within their field, although it does not directly affect ranking placement.
The ranking methodology is founded on data from OpenAlex and CrossRef, two of the most comprehensive and authoritative bibliometric databases available to the research community globally. We invite readers to explore further details on these rigorous processes on our methodology page.
Research.com’s Mission Behind the Ranking
The intent of Research.com in producing this ranking is to motivate researchers, academic institutions, companies, and policymakers worldwide to identify and examine the trajectories of leading experts within Plant Science and Agronomy. Our goal is to provide the entire scientific community with transparent access to information about top-tier talent in specific areas of study, across diverse countries and research organizations.
Through this carefully curated and rigorously validated ranking, Research.com aims to foster collaboration, resource allocation, and informed decision-making in the global scientific ecosystem. This initiative underscores our dedication to celebrating scholarly excellence while promoting the advancement of knowledge in critical scientific domains.
