Daniel C. Olk

6.2k total citations · 1 hit paper
81 papers, 4.7k citations indexed

About

Daniel C. Olk is a scholar working on Soil Science, Plant Science and Environmental Chemistry. According to data from OpenAlex, Daniel C. Olk has authored 81 papers receiving a total of 4.7k indexed citations (citations by other indexed papers that have themselves been cited), including 59 papers in Soil Science, 29 papers in Plant Science and 24 papers in Environmental Chemistry. Recurrent topics in Daniel C. Olk's work include Soil Carbon and Nitrogen Dynamics (54 papers), Soil and Water Nutrient Dynamics (24 papers) and Isotope Analysis in Ecology (17 papers). Daniel C. Olk is often cited by papers focused on Soil Carbon and Nitrogen Dynamics (54 papers), Soil and Water Nutrient Dynamics (24 papers) and Isotope Analysis in Ecology (17 papers). Daniel C. Olk collaborates with scholars based in United States, Philippines and China. Daniel C. Olk's co-authors include Kenneth G. Cassman, Michael J. Castellano, John E. Sawyer, Johan Six, Jingdong Mao, Achim Dobermann, Kevin E. Mueller, Klaus Schmidt‐Rohr, E. W. Randall and J. K. Ladha and has published in prestigious journals such as Proceedings of the National Academy of Sciences, Environmental Science & Technology and PLoS ONE.

In The Last Decade

Daniel C. Olk

79 papers receiving 4.4k citations

Hit Papers

align trajectories

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.

Integrating plant litter quality, soil organic matter stabilization, and the carbon saturation concept

2015 526 citations Michael J. Castellano, Daniel C. Olk et al. profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Daniel C. Olk United States	38	3.0k	1.8k	991	985	635	81	4.7k
Mehmet Şenbayram Germany	29	2.4k 0.8×	1.7k 0.9×	1.0k 1.1×	971 1.0×	535 0.8×	58	4.3k
Klaus Dittert Germany	39	2.7k 0.9×	1.8k 1.0×	1.4k 1.4×	1.2k 1.2×	635 1.0×	121	4.8k
G. J. D. Kirk United Kingdom	43	2.4k 0.8×	3.5k 1.9×	1.1k 1.1×	1.2k 1.2×	392 0.6×	133	6.7k
Bahar S. Razavi Germany	41	2.8k 0.9×	2.6k 1.4×	557 0.6×	1.3k 1.3×	551 0.9×	102	5.1k
Paul W. Hill United Kingdom	37	2.6k 0.9×	1.4k 0.8×	992 1.0×	1.5k 1.6×	258 0.4×	116	4.4k
Ingrid Kaag Thomsen Denmark	40	2.9k 1.0×	1.1k 0.6×	1.3k 1.3×	1.0k 1.0×	871 1.4×	136	4.7k
Marie Spohn Germany	40	3.9k 1.3×	1.9k 1.0×	1.7k 1.7×	1.9k 1.9×	362 0.6×	89	5.5k
Michaela A. Dippold Germany	38	2.5k 0.8×	1.4k 0.8×	704 0.7×	1.5k 1.5×	347 0.5×	149	4.6k
Stephen Herbert United States	39	2.2k 0.7×	2.6k 1.4×	483 0.5×	577 0.6×	1.4k 2.3×	141	5.7k
H. Allen Torbert United States	36	2.5k 0.8×	3.4k 1.8×	1.1k 1.1×	731 0.7×	839 1.3×	183	6.6k

Countries citing papers authored by Daniel C. Olk

Since Specialization

Citations

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

Fields of papers citing papers by Daniel C. Olk

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Daniel C. Olk. 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 Daniel C. Olk. The network helps show where Daniel C. Olk may publish in the future.

Co-authorship network of co-authors of Daniel C. Olk

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

All Works

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20 of 20 papers shown

Clark, Christopher M., et al.. (2026). Environmental sustainability of future fertilizers: tradeoffs between ammonia volatilization and nitrate leaching for 11 enhanced efficiency fertilizers. Journal of Plant Nutrition. 49(6). 1000–1018.

Olk, Daniel C., et al.. (2025). Introduction of a Fallow Year to Continuous Rice Systems Enhances Crop Soil Nitrogen Uptake. European Journal of Soil Science. 76(1). 1 indexed citations

Chantigny, Martin H., Daniel C. Olk, & Denis A. Angers. (2025). Investigating the nature of soil carbohydrates and amino compounds with liquid chromatography. Soil Science Society of America Journal. 89(1).

King, Alison E., Joseph P. Amsili, S. Carolina Córdova, et al.. (2024). Constraints on mineral-associated and particulate organic carbon response to regenerative management: carbon inputs and saturation deficit. Soil and Tillage Research. 238. 106008–106008. 9 indexed citations

King, Alison E., Joseph P. Amsili, S. Carolina Córdova, et al.. (2023). A soil matrix capacity index to predict mineral-associated but not particulate organic carbon across a range of climate and soil pH. Biogeochemistry. 165(1). 1–14. 25 indexed citations

Abdelrahman, Hamada, Diana Hofmann, Rachel L. Sleighter, et al.. (2023). Molecular composition and possible transformations of labile soil organic matter fractions in Mediterranean arable soils: Relevance and implications. Environmental Research. 232. 116315–116315. 4 indexed citations

Olk, Daniel C., et al.. (2022). Maize Growth Responses to a Humic Product in Iowa Production Fields: An Extensive Approach. Frontiers in Plant Science. 12. 778603–778603. 5 indexed citations

Olk, Daniel C., et al.. (2021). Maize Growth and Grain Yield Responses to a Micronized Humic Product Across Soil Types and Annual Weather Patterns in Central Iowa, United States. Frontiers in Plant Science. 12. 672078–672078. 5 indexed citations

Chen, Xi, Xinxin Ye, Wenying Chu, et al.. (2020). Formation of Char-Like, Fused-Ring Aromatic Structures from a Nonpyrogenic Pathway during Decomposition of Wheat Straw. Journal of Agricultural and Food Chemistry. 68(9). 2607–2614. 11 indexed citations

10.

Olk, Daniel C., et al.. (2019). Can humic products substantially improve ecosystem quality and economic yield. 20. 95–110. 4 indexed citations

11.

Olk, Daniel C., Paul R. Bloom, E. Michael Perdue, et al.. (2019). Environmental and Agricultural Relevance of Humic Fractions Extracted by Alkali from Soils and Natural Waters. Journal of Environmental Quality. 48(2). 217–232. 181 indexed citations

12.

Poffenbarger, Hanna, John E. Sawyer, Daniel W. Barker, et al.. (2018). Legacy effects of long-term nitrogen fertilizer application on the fate of nitrogen fertilizer inputs in continuous maize. Agriculture Ecosystems & Environment. 265. 544–555. 57 indexed citations

13.

Poffenbarger, Hanna, Daniel W. Barker, Matthew J. Helmers, et al.. (2017). Maximum soil organic carbon storage in Midwest U.S. cropping systems when crops are optimally nitrogen-fertilized. PLoS ONE. 12(3). e0172293–e0172293. 132 indexed citations

14.

Gương, Võ Thị, et al.. (2016). Effects of crop rotation on properties of a Vietnam clay soil under rice-based cropping systems in small-scale farmers’ fields. Soil Research. 55(2). 162–171. 7 indexed citations

15.

Cao, Xiaoyan, Klaus Schmidt‐Rohr, Daniel C. Olk, et al.. (2013). Similarities in chemical composition of soil organic matter across a millennia-old paddy soil chronosequence as revealed by advanced solid-state NMR spectroscopy. Biology and Fertility of Soils. 50(4). 571–581. 25 indexed citations

16.

He, Zhongqi, Tsutomu Ohno, Daniel C. Olk, & Fengchang Wu. (2010). Capillary electrophoresis profiles and fluorophore components of humic acids in Nebraska corn and Philippine rice soils. Geoderma. 156(3-4). 143–151. 10 indexed citations

17.

Olk, Daniel C., Kenneth G. Cassman, Klaus Schmidt‐Rohr, et al.. (2006). Chemical stabilization of soil organic nitrogen by phenolic lignin residues in anaerobic agroecosystems. Soil Biology and Biochemistry. 38(11). 3303–3312. 97 indexed citations

18.

Olk, Daniel C., et al.. (2004). Nitrogen Mineralization from Humic Acid Fractions in Rice Soils Depends on Degree of Humification. Soil Science Society of America Journal. 68(4). 1278–1284. 18 indexed citations

19.

Olofsdotter, Maria, et al.. (2002). Why Phenolic Acids Are Unlikely Primary Allelochemicals in Rice. Journal of Chemical Ecology. 28(1). 229–242. 86 indexed citations

20.

Cassman, Kenneth G., Shaobing Peng, Daniel C. Olk, et al.. (1998). Opportunities for increased nitrogen-use efficiency from improved resource management in irrigated rice systems. Field Crops Research. 56(1-2). 7–39. 467 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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