Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies
if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the
same subfield and year (this is the minimum needed to enter the top 1%, not the average
within it), or reaches the top citation threshold in at least one of its specific research
topics.
Can China's overuse of fertilizer be reduced without threatening food security and farm incomes?
2021129 citationsC.F.A. van Wesenbeeck, M.A. Keyzer et al.profile →
Peers — A (Enhanced Table)
Peers by citation overlap · career bar shows stage (early→late)
cites ·
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This map shows the geographic impact of M.A. Keyzer's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by M.A. Keyzer with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites M.A. Keyzer more than expected).
This network shows the impact of papers produced by M.A. Keyzer. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by M.A. Keyzer. The network helps show where M.A. Keyzer may publish in the future.
Co-authorship network of co-authors of M.A. Keyzer
This figure shows the co-authorship network connecting the top 25 collaborators of M.A. Keyzer.
A scholar is included among the top collaborators of M.A. Keyzer based on the total number of
citations received by their joint publications. Widths of edges
represent the number of papers authors have co-authored together.
Node borders
signify the number of papers an author published with M.A. Keyzer. M.A. Keyzer is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Keyzer, M.A., et al.. (2011). Executive project summary of CATSEI project: Chinese agricultural transition: trade, social and environmental Impacts. Digital Academic REpository of VU University Amsterdam (Vrije Universiteit Amsterdam).1 indexed citations
4.
Sonneveld, B.G.J.S., et al.. (2010). Land degradation and overgrazing in the Afar region, Ethiopia: a spatial analysis using rainfall use efficiency. Data Archiving and Networked Services (DANS).1 indexed citations
Keyzer, M.A. & Saket Pande. (2009). Instrumentalization using quantiles in semiparametric support vector regression. Data Archiving and Networked Services (DANS).2 indexed citations
Keyzer, M.A.. (2000). Reweighting survey observations by Monte Carlo integration on a census. Data Archiving and Networked Services (DANS).3 indexed citations
17.
Sonneveld, B.G.J.S., et al.. (1999). A non-parametric analysis of qualitative and quantitative data erosion modelling: a case study for Ethiopia. Data Archiving and Networked Services (DANS).10 indexed citations
18.
Keyzer, M.A., et al.. (1999). CAP-reform in Agenda 2000: logic and contradictions. Ch. 7. Data Archiving and Networked Services (DANS). 151–173.1 indexed citations
19.
Keyzer, M.A., et al.. (1998). Impact analyses of the Agenda 2000 proposals for CAP reform. Data Archiving and Networked Services (DANS). 71–90.2 indexed citations
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive
bibliographic database. While OpenAlex provides broad and valuable coverage of the global
research landscape, it—like all bibliographic datasets—has inherent limitations. These include
incomplete records, variations in author disambiguation, differences in journal indexing, and
delays in data updates. As a result, some metrics and network relationships displayed in
Rankless may not fully capture the entirety of a scholar's output or impact.