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.
Global Sequestration Potential of Increased Organic Carbon in Cropland Soils
2017330 citationsRobert J. Zomer, Déborah Bossio et al.Scientific Reportsprofile →
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 Rolf Sommer'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 Rolf Sommer with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Rolf Sommer more than expected).
This network shows the impact of papers produced by Rolf Sommer. 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 Rolf Sommer. The network helps show where Rolf Sommer may publish in the future.
Co-authorship network of co-authors of Rolf Sommer
This figure shows the co-authorship network connecting the top 25 collaborators of Rolf Sommer.
A scholar is included among the top collaborators of Rolf Sommer 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 Rolf Sommer. Rolf Sommer is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Sommer, Rolf, et al.. (2019). Rangeland Degradation: Causes, Consequences, Monitoring Techniques and Remedies. CGSPace A Repository of Agricultural Research Outputs (Consultative Group for International Agricultural Research).24 indexed citations
6.
Onwonga, Richard N., et al.. (2017). Index-based agricultural insurance products: challenges, opportunities and prospects for uptake in sub-Sahara Africa. SHILAP Revista de lepidopterología.30 indexed citations
7.
Zomer, Robert J., Déborah Bossio, Rolf Sommer, & Louis Verchot. (2017). Global Sequestration Potential of Increased Organic Carbon in Cropland Soils. Scientific Reports. 7(1). 15554–15554.330 indexed citations breakdown →
Ryan, John, H. Ibrikçi, Rolf Sommer, & Abdul Rashid. (2012). Phosphorus: Agricultural Nutrient. CGSPace A Repository of Agricultural Research Outputs (Consultative Group for International Agricultural Research).
Sommer, Rolf, et al.. (1986). Students show low awareness of agricultural careers. California Agriculture. 40(3). 4–6.4 indexed citations
17.
Sommer, Rolf, et al.. (1983). Farmers' markets are good for downtown. California Agriculture. 37(5). 30–32.4 indexed citations
18.
Sommer, Rolf, et al.. (1981). Price savings at California consumer co-ops. California Agriculture. 35(1). 4–5.1 indexed citations
19.
Sommer, Rolf, et al.. (1980). Farmers' markets please their customers. California Agriculture. 34(4). 10–12.11 indexed citations
20.
Sommer, Rolf. (1979). Farmers' markets—myths and realities. California Agriculture. 33(2). 12–14.2 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.