Mirjam Helfrich

2.5k total citations
45 papers, 2.0k citations indexed

About

Mirjam Helfrich is a scholar working on Soil Science, Environmental Chemistry and Ecology. According to data from OpenAlex, Mirjam Helfrich has authored 45 papers receiving a total of 2.0k indexed citations (citations by other indexed papers that have themselves been cited), including 42 papers in Soil Science, 22 papers in Environmental Chemistry and 19 papers in Ecology. Recurrent topics in Mirjam Helfrich's work include Soil Carbon and Nitrogen Dynamics (42 papers), Soil and Water Nutrient Dynamics (22 papers) and Peatlands and Wetlands Ecology (14 papers). Mirjam Helfrich is often cited by papers focused on Soil Carbon and Nitrogen Dynamics (42 papers), Soil and Water Nutrient Dynamics (22 papers) and Peatlands and Wetlands Ecology (14 papers). Mirjam Helfrich collaborates with scholars based in Germany, United States and Netherlands. Mirjam Helfrich's co-authors include Bernard Ludwig, Heinz Flessa, Heiner Flessa, H. Flessa, Axel Don, Robert Mikutta, P. Buurman, Roland Fuß, Tamon Yamashita and B. John and has published in prestigious journals such as Chemosphere, Soil Biology and Biochemistry and Plant and Soil.

In The Last Decade

Mirjam Helfrich

44 papers receiving 1.9k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Mirjam Helfrich Germany 23 1.4k 646 512 246 203 45 2.0k
David A.N. Ussiri United States 20 1.2k 0.9× 565 0.9× 500 1.0× 297 1.2× 240 1.2× 31 2.0k
Michael Kaiser Germany 26 1.5k 1.1× 661 1.0× 472 0.9× 311 1.3× 311 1.5× 51 2.2k
Craig Anderson New Zealand 19 895 0.6× 458 0.7× 475 0.9× 365 1.5× 173 0.9× 37 2.0k
Sarah Kemmitt United Kingdom 14 1.5k 1.0× 843 1.3× 461 0.9× 518 2.1× 174 0.9× 15 2.0k
H. Flessa Germany 19 1.1k 0.8× 672 1.0× 631 1.2× 337 1.4× 237 1.2× 27 2.0k
J. L. Gaunt United Kingdom 19 1.4k 1.0× 605 0.9× 578 1.1× 385 1.6× 214 1.1× 33 2.3k
Priit Tammeorg Finland 17 860 0.6× 384 0.6× 269 0.5× 374 1.5× 195 1.0× 33 1.7k
Erick Zagal Chile 22 1.3k 0.9× 508 0.8× 268 0.5× 532 2.2× 215 1.1× 89 2.1k
Jeffrey A. Bird United States 25 1.6k 1.1× 817 1.3× 497 1.0× 521 2.1× 143 0.7× 40 2.2k
Eleanor E. Campbell United States 13 1.4k 1.0× 803 1.2× 522 1.0× 377 1.5× 112 0.6× 24 2.0k

Countries citing papers authored by Mirjam Helfrich

Since Specialization
Citations

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

Fields of papers citing papers by Mirjam Helfrich

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Mirjam Helfrich. 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 Mirjam Helfrich. The network helps show where Mirjam Helfrich may publish in the future.

Co-authorship network of co-authors of Mirjam Helfrich

This figure shows the co-authorship network connecting the top 25 collaborators of Mirjam Helfrich. A scholar is included among the top collaborators of Mirjam Helfrich 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 Mirjam Helfrich. Mirjam Helfrich 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.
Dechow, René, Mirjam Helfrich, Ana Meijide, et al.. (2025). Evaluating N 2 O emissions and carbon sequestration in temperate croplands with cover crops: insights from field trials. SOIL. 11(2). 489–506. 1 indexed citations
2.
Kühling, Insa, Mirjam Helfrich, Heinz Flessa, et al.. (2025). Legacies of winter cover crops lead to opposing optimal N fertilisation rates and yields in first and second subsequent crops on contrasting soils. Nutrient Cycling in Agroecosystems. 131(1). 123–139.
3.
Helfrich, Mirjam, et al.. (2024). Nitrogen transformation as affected by decomposition of 15N‐labeled cover crop shoots and roots. Journal of Plant Nutrition and Soil Science. 187(6). 748–765. 1 indexed citations
4.
Kühling, Insa, et al.. (2023). Effects of winter cover crops from different functional groups on soil-plant nitrogen dynamics and silage maize yield. European Journal of Agronomy. 148. 126878–126878. 11 indexed citations
5.
Helfrich, Mirjam, et al.. (2021). Impact of common sample pre-treatments on key soil microbial properties. Soil Biology and Biochemistry. 160. 108321–108321. 45 indexed citations
6.
Mueller, Carsten W., et al.. (2021). Geogenic organic carbon in terrestrial sediments and its contribution to total soil carbon. SOIL. 7(2). 347–362. 17 indexed citations
7.
Rethemeyer, Janet, Jörg Bachmann, Mirjam Helfrich, et al.. (2020). Vertical partitioning of CO 2 production in a forest soil. Biogeosciences. 17(24). 6341–6356. 18 indexed citations
8.
Helfrich, Mirjam, Reinhard Well, René Dechow, et al.. (2020). Effect of chemical and mechanical grassland conversion to cropland on soil mineral N dynamics and N2O emission. Agriculture Ecosystems & Environment. 298. 106975–106975. 15 indexed citations
9.
Don, Axel, Janet Rethemeyer, Jörg Bachmann, et al.. (2019). Vertical partitioning of CO 2 production in a Dystric Cambisol. 2 indexed citations
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12.
Basler, A., Michaela A. Dippold, Mirjam Helfrich, & Jens Dyckmans. (2015). Recycling vs. stabilisation of soil sugars – a long-term laboratory incubation experiment. 2 indexed citations
13.
Basler, A., Michaela A. Dippold, Mirjam Helfrich, & Jens Dyckmans. (2015). Microbial carbon recycling: an underestimated process controlling soil carbon dynamics. 4 indexed citations
14.
Basler, A., Michaela A. Dippold, Mirjam Helfrich, & Jens Dyckmans. (2015). Microbial carbon recycling – an underestimated process controlling soil carbon dynamics – Part 1: A long-term laboratory incubation experiment. Biogeosciences. 12(20). 5929–5940. 28 indexed citations
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Basler, A., Michaela A. Dippold, Mirjam Helfrich, & Jens Dyckmans. (2015). Microbial carbon recycling: an underestimated process controlling soil carbon dynamics – Part 2: A C 3 -C 4 vegetation change field labelling experiment. Biogeosciences. 12(21). 6291–6299. 13 indexed citations
17.
Schroll, Reiner, et al.. (2014). Pyrochars and hydrochars differently alter the sorption of the herbicide isoproturon in an agricultural soil. Chemosphere. 119. 155–162. 49 indexed citations
18.
Roth, Grégory, Heinz Flessa, Mirjam Helfrich, & Reinhard Well. (2012). Impact of two different types of grassland-to-cropland-conversion on dynamics of soil organic matter mineralization and N2O emission. EGU General Assembly Conference Abstracts. 13319. 2 indexed citations
19.
Jacobs, Anna, Mirjam Helfrich, Jens Dyckmans, Rolf Rauber, & Bernard Ludwig. (2011). Effects of residue location on soil organic matter turnover: results from an incubation experiment with 15N‐maize. Journal of Plant Nutrition and Soil Science. 174(4). 634–643. 6 indexed citations
20.
Helfrich, Mirjam, Bernard Ludwig, P. Buurman, & H. Flessa. (2006). Effect of land use on the composition of soil organic matter in density and aggregate fractions as revealed by solid-state 13C NMR spectroscopy. Geoderma. 136(1-2). 331–341. 214 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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