A scientist’s position in the ranking is determined exclusively by their D-index (Discipline H-index), a refined metric that evaluates scholarly output and citation impact within a specific discipline. This approach ensures the ranking reflects contributions pertinent only to the field under examination, in this case, Plant Science and Agronomy.
Scope of Research and Qualification Criteria
The ranking process encompassed an extensive review of 279,971 scientist profiles identified across a broad array of bibliometric data sources spanning all scientific disciplines. Within this universe, 1,000 scientists specializing in Plant Science and Agronomy were identified for detailed consideration.
To qualify for inclusion, a scientist’s D-index in Plant Science and Agronomy had to meet or exceed a threshold of 30, signifying a substantial disciplinary impact. Additionally, the majority of their tier publications—those considered most significant—needed to be situated within the Plant Science and Agronomy domain. Awards and recognized achievements by scientists in this field were also taken into account as supplementary factors.
The D-index thresholds are calibrated dynamically, increasing in increments of 10 relative to the estimated total number of scholars in each discipline. This calibration ensures the inclusion of the top 1% of leading researchers, maintaining an exclusive and high-impact selection. Importantly, to maintain discipline-specific relevance, a maximum proximity of 30% is allowed between a scientist’s general H-index and their D-index, emphasizing focused scholarly contributions rather than generalized academic productivity.
Verification and Validation Practices
We recognize that raw bibliometric data alone cannot provide a definitive measure of a researcher’s contributions. In acknowledgment of this, all scientist profiles included in the ranking underwent thorough manual verification. This process included cross-referencing publications against a broad spectrum of trustworthy and reputable sources to ensure accuracy and authenticity.
While the number of publications in prominent journals and leading conference proceedings is not a determining factor for ranking position, it is regarded as a valuable secondary signal of a scientist’s influence and engagement within their discipline.
Ultimately, the ranking position is established based on each researcher’s D-index as calculated from data aggregated primarily from OpenAlex and CrossRef, which are among the most prominent and reliable bibliometric databases available to the research community today. For an in-depth overview of the methodology and standards applied, we encourage readers to visit our methodology page.
Research.com’s Mission and Vision
At Research.com, our mission is to inspire and empower researchers, industry leaders, policymakers, and academic institutions worldwide to identify and track the trajectories of leading experts across scientific disciplines. By providing transparent, data-driven rankings, we strive to foster a deeper understanding of who the foremost authorities are in specific fields of study, within countries, and across research institutions.
Through this initiative, we aim to facilitate collaboration, inform strategic decisions, and enhance the visibility of outstanding research contributions worldwide, underscoring our commitment to advancing the global scientific enterprise.
