Bibliometric data utilized to calculate the citation-based metrics informing the rankings were collected as of January 12, 2026. Each scientist's position within the ranking is determined by their Discipline H-index (D-index), which is a refined adaptation of the conventional H-index. The D-index uniquely considers only those papers and citations that pertain directly to the examined discipline, providing a more precise evaluation of scholarly impact in Plant Science and Agronomy.
Scope of Research and Inclusion Criteria
In developing this ranking, a thorough examination was conducted across 279,971 scientist profiles identified through diverse bibliometric sources encompassing all research disciplines. From this extensive dataset, 14 scientists specializing in Plant Science and Agronomy were specifically evaluated.
To qualify for inclusion in the ranking, scientists were required to have a minimum D-index of 30, signifying a substantial contribution to the discipline. Additionally, the majority of a candidate's tier publications needed to be concentrated within Plant Science and Agronomy. Consideration was also given to scientists’ awards and notable achievements specifically relevant to this field.
The threshold for the D-index was strategically set as an increment of 10, relative to the estimated total number of scholars within each discipline. This ensures that the ranking consistently represents the top 1% of leading experts while maintaining discipline-specific rigor. Furthermore, eligibility required that the proximity between a scientist’s general H-index and their D-index does not exceed 30%, maintaining focus on the discipline-specific impact rather than general scholarly output.
Verification and Validation Practices
The team behind this ranking recognizes that raw bibliometric data alone cannot comprehensively capture the multifaceted research contributions of individual scholars. Accordingly, all scientist profiles underwent meticulous manual verification. This process included cross-correlation against publications indexed in a wide array of reputable sources to confirm accuracy and relevance.
While the number of publications in prominent journals and conference proceedings does not directly influence the ranking position, it serves as a valuable secondary indicator of a researcher’s active contribution to their scientific community and the broader field.
Ultimately, the ranking position is established based on each researcher's D-index derived from information gathered via OpenAlex and CrossRef. This approach balances quantitative analysis with qualitative validation, reinforcing the credibility and precision of the ranking outcomes.
For more detailed information about the methodology behind this ranking, please visit our methodology page.
Research.com’s Mission and Vision
Research.com is dedicated to inspiring researchers, academic institutions, companies, and policymakers worldwide to recognize and follow the trajectories of leading experts in diverse scientific areas. By providing transparent and rigorously developed rankings, we strive to facilitate greater awareness within the global scientific community about who the foremost researchers are—whether at the country level, within specific disciplines such as Plant Science and Agronomy, or across institutions.
Through careful curation and a commitment to methodological excellence, this ranking aims to advance scholarly collaboration, inform strategic research investments, and support evidence-based decision-making for the progression of science both locally in Egypt and internationally.
