The bibliometric data used to devise the citation-based metrics were collected on 2026-01-12. This ensures that all citation counts and publication records reflect the most current research impact available at the time of analysis.
A scientist’s position within the ranking is determined by their D-index (Discipline H-index). Unlike a general H-index, the D-index restricts measurement strictly to publications and citations relevant to the targeted discipline, in this case, Plant Science and Agronomy. This focus allows for nuanced assessment that accurately reflects scholarly influence specifically within the discipline.
Scope of Research and Inclusion Criteria
In developing this ranking, a total of 279,971 scientist profiles spanning all disciplines were initially examined across the aggregated bibliometric data sources. From this dataset, 68 scientists were identified as active contributors within the Plant Science and Agronomy discipline.
To qualify for inclusion in the ranking, a scientist was required to have a minimum D-index of 30, ensuring that only researchers with demonstrable impact specific to Plant Science and Agronomy are considered. Additionally, the majority of a candidate’s tier publications—those appearing in top-tier journals or highly respected conference proceedings—must pertain to Plant Science and Agronomy.
Besides bibliometric criteria, researchers’ awards and achievements within the field were also evaluated as supplementary factors, reinforcing the recognition of substantive contributions beyond citation metrics alone.
The threshold D-index for considering top researchers varies in increments of 10, calibrated relative to the estimated total population of scholars within each discipline. This approach guarantees inclusion of the top 1% of leading experts, balancing comprehensiveness with elite distinction. Importantly, candidates were also required to demonstrate a reasonable proximity between their general H-index and their D-index—specifically, a difference of no more than 30%—to ensure disciplinary focus and consistency in their research impact.
Verification and Methodological Rigor
Recognizing that raw bibliometric data alone cannot serve as an absolute measure of scholarly output, meticulous manual verification was conducted to validate each scientist profile. This cross-correlation involved checking publication records against a wide array of trusted and authoritative sources to confirm authenticity and relevance.
While a scientist’s position in the ranking is determined solely by their D-index sourced from OpenAlex and CrossRef—two of the most prominent and respected bibliometric databases available—the number of papers published in leading journals and conference proceedings was also assessed as a valuable secondary signal of scientific contribution, albeit not factored directly into the ranking score.
The transparency of the methodology and the robustness of the underlying data ensure that this ranking can be trusted as a credible reflection of disciplinary impact. For comprehensive details on the methodology employed, readers are encouraged to visit our methodology page.
Research.com’s Mission and Vision Behind the Ranking
At Research.com, our mission is to motivate stakeholders across the global research ecosystem—including researchers, companies, policymakers, and academic institutions—to better understand the trajectories of leading experts worldwide. Through this ranking, we seek to provide a transparent, rigorous, and accessible means for the international scientific community to identify who the foremost authorities are in Plant Science and Agronomy within New Zealand.
By highlighting these leading scholars, we aim to facilitate informed collaborations, strategic funding decisions, and policy development that collectively advance scientific progress in this vital field. The ranking is a testament to the careful, methodical work invested in creating a credible resource that recognizes excellence and fosters an interconnected scientific community.
