All bibliometric data used to calculate citation-based metrics were collected on January 12, 2026, providing the most current snapshot of research impact available at the time of analysis. A scientist’s position within the ranking is determined by their D-index (Discipline H-index), a refined metric that exclusively includes publications and citations within the examined discipline, thereby offering a precise measure of specialized scholarly influence.
Scope of Research and Criteria for Inclusion
The ranking process examined a total of 279,971 scientist profiles identified through a diverse array of bibliometric data sources across all scientific disciplines. Specifically for the discipline of Plant Science and Agronomy, 2,000 scientists were evaluated to establish a focused and relevant cohort.
To qualify for inclusion in the ranking, researchers were required to meet a minimum D-index threshold of 30, with a majority of their tier publications concentrated within Plant Science and Agronomy. Additionally, scientists’ awards and accomplishments relevant to the discipline were factored into the assessment to ensure a comprehensive evaluation of scholarly excellence.
The threshold for the D-index is dynamically adjusted in increments of 10 based on the total estimated number of scholars in each discipline. This methodology guarantees that the top 1% of leading experts are incorporated into the list. Furthermore, to maintain alignment between general scholarly impact and disciplinary specialization, candidate scientists were required to have a proximity of 30% or less between their overall H-index and their D-index.
Additional Verification Practices
Recognizing that raw bibliometric data alone cannot fully capture the quality and breadth of scholarly contributions, the Research.com team undertook meticulous manual verification of all scientist profiles. Each profile was cross-verified against publications indexed in a wide variety of reputable sources, ensuring accuracy and minimizing potential errors or inconsistencies.
While the volume of publications in high-profile journals and conference proceedings is not a direct factor in determining ranking position, it remains an important secondary signal reflecting a scientist’s contribution and recognition within their specific field of plant science and agronomy research.
Ultimately, the position in the ranking is firmly established using each researcher’s D-index as calculated from data sourced from OpenAlex and CrossRef — the most prominent, comprehensive, and well-curated bibliometric databases accessible to the research community.
Researchers and academic representatives interested in a detailed exposition of the methodology are encouraged to visit our methodology page.
The Research.com Agenda
At Research.com, our mission is to motivate researchers, industry leaders, and policymakers globally to closely examine the trajectories and achievements of leading experts across diverse fields. This ranking provides the scientific community with a transparent, credible framework to identify and acknowledge top researchers in specialized domains such as Plant Science and Agronomy, within individual countries and research institutions.
By highlighting the scholars who are pushing boundaries and driving innovation, we aim to foster collaboration, informed decision-making, and recognition of excellence that ultimately accelerates progress and impact in plant science and its critical applications.
