Douglas L. Karlen

31.3k total citations · 9 hit papers
261 papers, 22.1k citations indexed

About

Douglas L. Karlen is a scholar working on Soil Science, Agronomy and Crop Science and Environmental Chemistry. According to data from OpenAlex, Douglas L. Karlen has authored 261 papers receiving a total of 22.1k indexed citations (citations by other indexed papers that have themselves been cited), including 180 papers in Soil Science, 97 papers in Agronomy and Crop Science and 83 papers in Environmental Chemistry. Recurrent topics in Douglas L. Karlen's work include Soil Carbon and Nitrogen Dynamics (165 papers), Soil and Water Nutrient Dynamics (80 papers) and Soil Management and Crop Yield (50 papers). Douglas L. Karlen is often cited by papers focused on Soil Carbon and Nitrogen Dynamics (165 papers), Soil and Water Nutrient Dynamics (80 papers) and Soil Management and Crop Yield (50 papers). Douglas L. Karlen collaborates with scholars based in United States, Brazil and China. Douglas L. Karlen's co-authors include Cynthia A. Cambardella, Susan S. Andrews, J. M. Novak, David A. Laird, T. B. Moorman, Timothy B. Parkin, Ronald F. Turco, Allan Konopka, Jeffrey P. Mitchell and Robert Horton and has published in prestigious journals such as Environmental Science & Technology, Renewable and Sustainable Energy Reviews and PLoS ONE.

In The Last Decade

Douglas L. Karlen

259 papers receiving 20.4k citations

Hit Papers

Field‐Scale Variability of Soil Properties in Central Iow... 1994 2026 2004 2015 1994 1997 2010 2010 2002 500 1000 1.5k 2.0k 2.5k
What are hit papers?

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.

  1. Field‐Scale Variability of Soil Properties in Central Iowa Soils
    1994 2.9k citations Cynthia A. Cambardella, J. M. Novak et al. Soil Science Society of America Journal profile →
  2. Soil Quality: A Concept, Definition, and Framework for Evaluation (A Guest Editorial)
    1997 1.4k citations Douglas L. Karlen et al. Soil Science Society of America Journal profile →
  3. Impact of biochar amendments on the quality of a typical Midwestern agricultural soil
    2010 1.1k citations David A. Laird, Douglas L. Karlen et al. profile →
  4. Biochar impact on nutrient leaching from a Midwestern agricultural soil
    2010 966 citations David A. Laird, Douglas L. Karlen et al. profile →
  5. A comparison of soil quality indexing methods for vegetable production systems in Northern California
    2002 940 citations Douglas L. Karlen et al. profile →
  6. The Soil Management Assessment Framework
    2004 911 citations Douglas L. Karlen, Cynthia A. Cambardella et al. Soil Science Society of America Journal profile →
  7. Nitrogen Management Strategies to Reduce Nitrate Leaching in Tile‐Drained Midwestern Soils
    2002 734 citations Dana L. Dinnes, Douglas L. Karlen et al. Agronomy Journal profile →
  8. Corn Stover to Sustain Soil Organic Carbon Further Constrains Biomass Supply
    2007 402 citations W. W. Wilhelm, Jane M. F. Johnson et al. Agronomy Journal profile →
  9. Understanding and Enhancing Soil Biological Health: The Solution for Reversing Soil Degradation
    2015 288 citations R. Michael Lehman, Cynthia A. Cambardella et al. Sustainability profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Douglas L. Karlen United States 69 13.9k 5.1k 4.8k 3.9k 3.8k 261 22.1k
G. Philip Robertson United States 79 12.2k 0.9× 5.2k 1.0× 2.7k 0.6× 6.2k 1.6× 5.0k 1.3× 296 25.2k
Cynthia A. Cambardella United States 46 7.9k 0.6× 2.8k 0.6× 3.0k 0.6× 2.8k 0.7× 1.7k 0.5× 91 12.3k
William J. Parton United States 89 17.1k 1.2× 5.8k 1.1× 2.7k 0.6× 6.6k 1.7× 3.2k 0.9× 260 32.8k
O. Oenema Netherlands 80 10.5k 0.8× 4.2k 0.8× 2.6k 0.5× 9.0k 2.3× 3.3k 0.9× 408 25.2k
Keith Paustian United States 83 27.4k 2.0× 5.2k 1.0× 6.1k 1.3× 9.4k 2.4× 5.3k 1.4× 263 41.2k
Genxing Pan China 71 10.4k 0.8× 4.6k 0.9× 2.0k 0.4× 2.4k 0.6× 1.8k 0.5× 353 20.0k
Klaus Butterbach‐Bahl Germany 83 14.9k 1.1× 4.5k 0.9× 2.1k 0.4× 8.4k 2.2× 2.4k 0.6× 470 26.8k
Alan J. Franzluebbers United States 65 11.1k 0.8× 3.1k 0.6× 1.4k 0.3× 4.1k 1.1× 3.4k 0.9× 280 15.8k
K. W. T. Goulding United Kingdom 60 9.8k 0.7× 5.1k 1.0× 1.6k 0.3× 5.7k 1.5× 2.0k 0.5× 250 18.8k
N.H. Batjes Netherlands 45 8.3k 0.6× 2.0k 0.4× 4.6k 1.0× 2.3k 0.6× 910 0.2× 145 17.0k

Countries citing papers authored by Douglas L. Karlen

Since Specialization
Citations

This map shows the geographic impact of Douglas L. Karlen'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 Douglas L. Karlen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Douglas L. Karlen more than expected).

Fields of papers citing papers by Douglas L. Karlen

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Douglas L. Karlen. 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 Douglas L. Karlen. The network helps show where Douglas L. Karlen may publish in the future.

Co-authorship network of co-authors of Douglas L. Karlen

This figure shows the co-authorship network connecting the top 25 collaborators of Douglas L. Karlen. A scholar is included among the top collaborators of Douglas L. Karlen 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 Douglas L. Karlen. Douglas L. Karlen is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Veum, Kristen S., Scott H. Holan, Skye Wills, et al.. (2025). Spatially explicit heteroskedastic modeling for the Soil Health Assessment Protocol and Evaluation version 1.0S. Soil Science Society of America Journal. 89(3). 1 indexed citations
2.
Nunes, Márcio Renato, Kristen S. Veum, Scott H. Holan, et al.. (2024). SHAPEv1.0 Scoring curves and peer group benchmarks for dynamic soil health indicators. Soil Science Society of America Journal. 88(3). 858–875. 9 indexed citations
3.
Phillips, Claire L., Mehari Z. Tekeste, S. D. Logsdon, et al.. (2023). Thirteen‐year stover harvest and tillage effects on soil compaction in Iowa. Agrosystems Geosciences & Environment. 6(2). 4 indexed citations
4.
Richard, Tom L., Sergio H. Lence, Huaiqing Wu, et al.. (2022). Rye as an Energy Cover Crop: Management, Forage Quality, and Revenue Opportunities for Feed and Bioenergy. Agriculture. 12(10). 1691–1691. 16 indexed citations
5.
Nunes, Márcio Renato, Renato Paiva de Lima, Cássio Antônio Tormena, & Douglas L. Karlen. (2021). Corn seedling root growth response to soil physical quality. Agronomy Journal. 113(4). 3135–3146. 7 indexed citations
6.
Li, Lidong, Virginia L. Jin, Timothy Kettler, et al.. (2021). Decreased land use intensity improves surface soil quality on marginal lands. Agrosystems Geosciences & Environment. 4(4). 10 indexed citations
7.
Nunes, Márcio Renato, Mriganka De, Marshall D. McDaniel, et al.. (2021). Science‐based maize stover removal can be sustainable. Agronomy Journal. 113(4). 3178–3192. 9 indexed citations
8.
Novak, J. M., James R. Frederick, D. W. Watts, Thomas F. Ducey, & Douglas L. Karlen. (2021). Corn Stover Removal Responses on Soil Test P and K Levels in Coastal Plain Ultisols. Sustainability. 13(8). 4401–4401. 1 indexed citations
9.
Nunes, Márcio Renato, Kristen S. Veum, Scott H. Holan, et al.. (2021). The soil health assessment protocol and evaluation applied to soil organic carbon. Soil Science Society of America Journal. 85(4). 1196–1213. 98 indexed citations
10.
Nunes, Márcio Renato, Douglas L. Karlen, & Thomas B. Moorman. (2020). Tillage Intensity Effects on Soil Structure Indicators—A US Meta-Analysis. Sustainability. 12(5). 2071–2071. 82 indexed citations
11.
Nunes, Márcio Renato, Douglas L. Karlen, Thomas B. Moorman, & Cynthia A. Cambardella. (2020). How does tillage intensity affect chemical soil health indicators? A United States meta‐analysis. Agrosystems Geosciences & Environment. 3(1). 10 indexed citations
12.
Nunes, Márcio Renato, Douglas L. Karlen, Kristen S. Veum, & Thomas B. Moorman. (2020). A SMAF assessment of U.S. tillage and crop management strategies. Environmental and Sustainability Indicators. 8. 100072–100072. 28 indexed citations
13.
Nunes, Márcio Renato, J. E. Denardin, Carlos Manoel Pedro Vaz, Douglas L. Karlen, & Cynthia A. Cambardella. (2019). Lime movement through highly weathered soil profiles. Environmental Research Communications. 1(11). 115002–115002. 17 indexed citations
14.
Karlen, Douglas L., Kristen S. Veum, Kenneth A. Sudduth, John F. Obrycki, & Márcio Renato Nunes. (2019). Soil health assessment: Past accomplishments, current activities, and future opportunities. Soil and Tillage Research. 195. 104365–104365. 208 indexed citations
15.
Moore, Kenneth J., Robert P. Anex, Amani Elobeid, et al.. (2019). Regenerating Agricultural Landscapes with Perennial Groundcover for Intensive Crop Production. Agronomy. 9(8). 458–458. 45 indexed citations
16.
Wilhelm, W. W., J. Richard Hess, Douglas L. Karlen, et al.. (2010). REVIEW: Balancing limiting factors & economic drivers for sustainable Midwestern US agricultural residue feedstock supplies. Industrial Biotechnology. 6(5). 271–287. 85 indexed citations
17.
Dinnes, Dana L., Douglas L. Karlen, Dan B. Jaynes, et al.. (2002). Nitrogen Management Strategies to Reduce Nitrate Leaching in Tile‐Drained Midwestern Soils. Agronomy Journal. 94(1). 153–171. 734 indexed citations breakdown →
18.
Karlen, Douglas L., et al.. (1995). Agricultural utilization of urban and industrial by-products : proceedings of a symposium sponsored by Divisions S-6 and S-7 of the Soil Science Society of America and A-5 of the American Society of Agronomy in Cincinnati, Ohio, 7-12 Nov. 1993. 3 indexed citations
19.
Karlen, Douglas L. & T. S. Colvin. (1992). Alternative Farming System Effects on Profile Nitrogen Concentrations on Two Iowa Farms. Soil Science Society of America Journal. 56(4). 1249–1256. 29 indexed citations
20.
Karlen, Douglas L., E. C. Berry, T. S. Colvin, & R. S. Kanwar. (1991). Twelve‐year tillage and crop rotation effects on yields and soil chemical properties in northeast Iowa. Communications in Soil Science and Plant Analysis. 22(19-20). 1985–2003. 83 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.

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