Bibliometric data for constructing the citation-based metrics featured in the ranking were meticulously gathered as of January 12, 2026. The ranking methodology centers on the D-index (Discipline H-index), a specialized metric that calculates a researcher’s impact exclusively within the examined discipline. This ensures that only papers and citation counts relevant to Plant Science and Agronomy contribute to the evaluation, providing a discipline-focused perspective on scholarly influence.
Scope of Research and Eligibility Criteria
The ranking’s scope encompasses a broad examination of 279,971 scientist profiles identified across a variety of bibliometric data sources spanning all academic disciplines. Within this expansive dataset, 265 scientists specifically affiliated with the field of Plant Science and Agronomy were carefully assessed.
To qualify for inclusion in the ranking, a scientist must have attained a minimum D-index of 30, thereby reflecting a significant level of research impact within the discipline. Furthermore, a majority of an eligible scientist’s tier publications must be categorized under Plant Science and Agronomy to ensure relevance and subject specialization. In addition to quantitative metrics, qualitative considerations such as notable awards and significant achievements in the respective field were also incorporated into the evaluation process.
The D-index threshold for recognizing leading researchers is adaptively set in increments of 10, aligned with the estimated total population of scholars in each discipline. This approach guarantees that the top 1% of leading experts are systematically included in the ranking. A further condition requires that the difference between a researcher’s general H-index and their discipline-specific D-index remains within a proximity of 30% or less, ensuring consistent expertise focus.
Verification and Validation Practices
The Research.com team acknowledges that raw bibliometric data alone cannot serve as an absolute measure of scholarly output or impact. Consequently, all scientist profiles included in the ranking underwent careful manual verification. This process involved rigorous cross-referencing against a broad spectrum of authoritative publication records and trusted academic sources to confirm authenticity and accuracy.
While not directly influencing a researcher’s position in the ranking, the number of publications appearing in prominent journals and conference proceedings is recognized as a valuable supplementary indicator of sustained scientific contribution within a given area. The ranking’s foundation remains the D-index, calculated from data sourced principally from OpenAlex and CrossRef, thereby ensuring robust and transparent assessment based on widely recognized bibliometric standards.
For those interested in a comprehensive understanding of the detailed methodology behind this ranking, we invite you to consult our methodology page.
Research.com’s Mission and Vision
Research.com is dedicated to fostering a global scientific ecosystem that empowers researchers, industry leaders, academic institutions, and policymakers. Our mission is to motivate and facilitate informed decisions by illuminating where leading experts are focusing their efforts within specific scientific disciplines across countries and institutions.
By providing a transparent and meticulously curated ranking of top scientists, we aim to promote recognition of outstanding scholarly achievements and help the broader scientific community identify and connect with the foremost authorities in Plant Science and Agronomy in Italy. This initiative supports the advancement of collaborative research, policy formulation, and innovation, reflecting our commitment to the continued growth and excellence of global science.
