The bibliometric data used to compute citation-based metrics for this ranking were collected on 2026-01-12. A key metric employed in positioning scientists within the ranking is the D-index (Discipline H-index). Unlike a general H-index, the D-index is carefully calculated using publications and corresponding citation data solely within the examined discipline of Plant Science and Agronomy, ensuring that the ranking reflects expertise and impact concentrated in this specific research area.
Scope of Research and Ranking Criteria
Our comprehensive analysis began with a dataset encompassing 279,971 scientist profiles identified from diverse bibliometric databases spanning all academic disciplines. Out of these, a focused group of 71 scientists specializing in Plant Science and Agronomy was examined in depth for this ranking.
To qualify for inclusion in the ranked list, a scientist was required to have a D-index of at least 30. Moreover, a majority of their tier publications — defined by citation impact and journal standing — needed to be directly relevant to Plant Science and Agronomy. Recognizing the significance of scholarly recognition beyond metrics, awards and notable achievements within the field were also carefully considered as supplementary factors.
The threshold for the D-index is dynamically set in increments of 10, calibrated according to the total estimated number of active scholars in each discipline to maintain a stringent selection process. This approach guarantees that the top 1% of leading experts within Plant Science and Agronomy are represented. Additionally, to mitigate anomalies, only researchers whose general H-index and D-index differ by 30% or less were included, ensuring relative consistency between their overall and discipline-specific impact.
Verification and Validation Processes
We recognize that raw bibliometric data alone cannot provide an absolute assessment of a researcher’s output and contributions. Therefore, all scientist profiles included in this ranking underwent meticulous manual verification. This process involved cross-correlating publication records against a broad spectrum of trustworthy sources to ascertain accuracy and reduce errors such as misattribution or incomplete data.
While the number of papers published in prominent journals and conference proceedings is not directly factored into the positioning within the Research.com ranking, it serves as a valuable secondary indicator of a scientist’s contribution and stature in their field.
Ultimately, the ranking positions rely on the rigorously computed D-index, derived from citation and publication data sourced primarily from OpenAlex and CrossRef — two of the most prominent and widely respected bibliometric databases accessible to the research community today.
We encourage interested readers to consult our methodology page for a detailed overview of the comprehensive processes underpinning this ranking.
Research.com’s Mission and Agenda
At Research.com, our core mission is to stimulate researchers, academic institutions, companies, and policymakers worldwide to gain clear insights into the trajectories and contributions of leading experts in various scientific domains. By providing transparent and rigorously curated rankings, we aim to facilitate the scientific community’s ability to identify, collaborate with, and honor top researchers.
These rankings are designed not only to reveal who the leading authorities are within specific research areas and countries but also to foster informed decision-making in funding, recruitment, and strategic research initiatives. Our work helps elevate scientific excellence by shining a spotlight on distinguished scholars and enabling the global community to recognize and learn from their advancements.
