Norbert Claassen

2.8k total citations
51 papers, 1.9k citations indexed

About

Norbert Claassen is a scholar working on Plant Science, Soil Science and Industrial and Manufacturing Engineering. According to data from OpenAlex, Norbert Claassen has authored 51 papers receiving a total of 1.9k indexed citations (citations by other indexed papers that have themselves been cited), including 43 papers in Plant Science, 23 papers in Soil Science and 12 papers in Industrial and Manufacturing Engineering. Recurrent topics in Norbert Claassen's work include Plant nutrient uptake and metabolism (30 papers), Soil Carbon and Nitrogen Dynamics (18 papers) and Plant Micronutrient Interactions and Effects (13 papers). Norbert Claassen is often cited by papers focused on Plant nutrient uptake and metabolism (30 papers), Soil Carbon and Nitrogen Dynamics (18 papers) and Plant Micronutrient Interactions and Effects (13 papers). Norbert Claassen collaborates with scholars based in Germany, India and Chile. Norbert Claassen's co-authors include Bernd Steingrobe, A. Jungk, Stanley A. Barber, Ricardo A. Cabeza, Tara Singh Gahoonia, Wilhelm Römer, Harald Schmid, U. S. Sadana, Nigussie Dechassa and M. Schenk and has published in prestigious journals such as PLANT PHYSIOLOGY, Soil Biology and Biochemistry and Plant and Soil.

In The Last Decade

Norbert Claassen

51 papers receiving 1.7k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Norbert Claassen Germany 25 1.3k 604 372 300 250 51 1.9k
Alain Mollier France 24 1.3k 1.0× 542 0.9× 453 1.2× 457 1.5× 373 1.5× 68 2.0k
Bernd Steingrobe Germany 19 753 0.6× 342 0.6× 326 0.9× 167 0.6× 159 0.6× 40 1.2k
J. A. Quaggio Brazil 28 2.0k 1.5× 976 1.6× 148 0.4× 178 0.6× 148 0.6× 115 2.6k
Takashi Muraoka Brazil 25 1.4k 1.1× 953 1.6× 157 0.4× 440 1.5× 118 0.5× 154 2.2k
Michael T. Rose Australia 27 1.2k 0.9× 934 1.5× 287 0.8× 266 0.9× 281 1.1× 73 2.3k
Paulo Roberto Ernani Brazil 24 1.2k 0.9× 1.2k 1.9× 154 0.4× 260 0.9× 142 0.6× 128 1.9k
K. K. Kapoor India 18 734 0.6× 1.1k 1.8× 197 0.5× 305 1.0× 156 0.6× 37 1.6k
Peter M. Bierman United States 16 735 0.6× 798 1.3× 200 0.5× 159 0.5× 157 0.6× 25 1.3k
A. Subba Rao India 28 1.1k 0.8× 982 1.6× 239 0.6× 455 1.5× 346 1.4× 83 2.2k
J.L. Gonzalez Spain 17 593 0.4× 1.1k 1.8× 189 0.5× 266 0.9× 148 0.6× 23 1.7k

Countries citing papers authored by Norbert Claassen

Since Specialization
Citations

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

Fields of papers citing papers by Norbert Claassen

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Norbert Claassen

This figure shows the co-authorship network connecting the top 25 collaborators of Norbert Claassen. A scholar is included among the top collaborators of Norbert Claassen 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 Norbert Claassen. Norbert Claassen 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.
Sadana, U. S., et al.. (2025). Manganese efficiency of bread ( Triticum aestivum ) and durum ( Triticum durum ) wheat cultivars grown in a low Mn soil. Journal of Plant Nutrition. 48(12). 2123–2136. 1 indexed citations
2.
Cabeza, Ricardo A., Bernd Steingrobe, & Norbert Claassen. (2019). Phosphorus Fractionation in Soils Fertilized with Recycled Phosphorus Products. Journal of soil science and plant nutrition. 19(3). 611–619. 23 indexed citations
3.
Cabeza, Ricardo A., et al.. (2017). Phosphorus fractions depletion in the rhizosphere of young and adult maize and oilseed rape plants. Journal of soil science and plant nutrition. 17(3). 824–838. 18 indexed citations
4.
Cabeza, Ricardo A., Bernd Steingrobe, Wilhelm Römer, & Norbert Claassen. (2013). Plant availability of isotopically exchangeable and isotopically nonexchangeable phosphate in soils. Journal of Plant Nutrition and Soil Science. 176(5). 688–695. 8 indexed citations
5.
Steingrobe, Bernd, et al.. (2012). Shoot cadmium concentration of soil‐grown plants as related to their root properties. Journal of Plant Nutrition and Soil Science. 175(3). 456–465. 11 indexed citations
6.
Claassen, Norbert, et al.. (2012). Cadmium uptake kinetics and plants factors of shoot Cd concentration. Plant and Soil. 367(1-2). 591–603. 31 indexed citations
7.
Khorassani, Reza, et al.. (2011). Citramalic acid and salicylic acid in sugar beet root exudates solubilize soil phosphorus. BMC Plant Biology. 11(1). 121–121. 89 indexed citations
8.
9.
Steingrobe, Bernd, et al.. (2009). Phosphorus Uptake Kinetics, Root-Shoot Relations and P-Influx of Groundnut and Maize Grown in Solution Culture. eScholarship (California Digital Library). 3 indexed citations
10.
Fischinger, Stephanie, Jean‐Jacques Drevon, Norbert Claassen, & Joachim Schulze. (2006). Nitrogen from senescing lower leaves of common bean is re-translocated to nodules and might be involved in a N-feedback regulation of nitrogen fixation. Journal of Plant Physiology. 163(10). 987–995. 33 indexed citations
11.
Liebersbach, Horst, Bernd Steingrobe, & Norbert Claassen. (2004). Roots regulate ion transport in the rhizosphere to counteract reduced mobility in dry soil. Plant and Soil. 260(1-2). 79–88. 56 indexed citations
12.
Steingrobe, Bernd, et al.. (2001). Root production and root mortality of winter wheat grown on sandy and loamy soils in different farming systems. Biology and Fertility of Soils. 33(4). 331–339. 35 indexed citations
13.
Steingrobe, Bernd, Harald Schmid, & Norbert Claassen. (2000). The use of the ingrowth core method for measuring root production of arable crops — influence of soil conditions inside the ingrowth core on root growth. Journal of Plant Nutrition and Soil Science. 163(6). 617–622. 60 indexed citations
14.
Schulz, Volker P., et al.. (1998). Potassium fertilization on sandy soils in relation to soil test, crop yield and K‐leaching. Zeitschrift für Pflanzenernährung und Bodenkunde. 161(5). 591–599. 33 indexed citations
15.
Jungk, A., et al.. (1995). Observed and Calculated Potassium Uptake by Maize as Affected by Soil Water Content and Bulk Density. Agronomy Journal. 87(6). 1070–1077. 58 indexed citations
16.
Gronauer, Andreas, et al.. (1994). Ammoniakverflüchtigung während der Flüssigmistausbringung. 49(2). 70–71. 1 indexed citations
17.
Hoffmann, Christa, Erwin Ladewig, Norbert Claassen, & A. Jungk. (1994). Phosphorus uptake of maize as affected by ammonium and nitrate nitrogen ‐ Measurements and model calculations ‐. Zeitschrift für Pflanzenernährung und Bodenkunde. 157(3). 225–232. 36 indexed citations
18.
Claassen, Norbert, et al.. (1990). A method for determining Michaelis‐Menten kinetic parameters of nutrient uptake for plants growing in soil. Zeitschrift für Pflanzenernährung und Bodenkunde. 153(5). 301–303. 10 indexed citations
19.
Jungk, A. & Norbert Claassen. (1989). Availability in Soil and Acquisition by Plants as the Basis for Phosphorus and Potassium supply to Plants. Zeitschrift für Pflanzenernährung und Bodenkunde. 152(2). 151–157. 69 indexed citations
20.
Claassen, Norbert & Stanley A. Barber. (1974). A Method for Characterizing the Relation between Nutrient Concentration and Flux into Roots of Intact Plants. PLANT PHYSIOLOGY. 54(4). 564–568. 239 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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