G. Hardarson

3.5k total citations
56 papers, 2.2k citations indexed

About

G. Hardarson is a scholar working on Plant Science, Agronomy and Crop Science and Soil Science. According to data from OpenAlex, G. Hardarson has authored 56 papers receiving a total of 2.2k indexed citations (citations by other indexed papers that have themselves been cited), including 50 papers in Plant Science, 24 papers in Agronomy and Crop Science and 10 papers in Soil Science. Recurrent topics in G. Hardarson's work include Legume Nitrogen Fixing Symbiosis (44 papers), Agronomic Practices and Intercropping Systems (23 papers) and Soybean genetics and cultivation (14 papers). G. Hardarson is often cited by papers focused on Legume Nitrogen Fixing Symbiosis (44 papers), Agronomic Practices and Intercropping Systems (23 papers) and Soybean genetics and cultivation (14 papers). G. Hardarson collaborates with scholars based in Austria, Netherlands and United Kingdom. G. Hardarson's co-authors include S. K. A. Danso, Felipe Zapata, Maurice Fried, Craig A. Atkins, Donovan Jones, Adriana Montañez, Carroll P. Vance, Angela Sessitsch, Klaus Reichardt and Margarita Sicardi and has published in prestigious journals such as Applied and Environmental Microbiology, Soil Biology and Biochemistry and Molecular Ecology.

In The Last Decade

G. Hardarson

55 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
G. Hardarson Austria 27 1.9k 1.2k 532 137 82 56 2.2k
C. L. McDonald Canada 23 1.3k 0.7× 792 0.7× 493 0.9× 101 0.7× 67 0.8× 42 1.6k
R. J. Rennie Canada 23 1.3k 0.7× 497 0.4× 328 0.6× 137 1.0× 60 0.7× 42 1.4k
S.R. Temple United States 17 756 0.4× 310 0.3× 367 0.7× 121 0.9× 107 1.3× 35 1.1k
Greg D. Hoyt United States 20 623 0.3× 398 0.3× 558 1.0× 144 1.1× 171 2.1× 53 1.2k
José Guilherme Marinho Guerra Brazil 20 842 0.4× 325 0.3× 724 1.4× 74 0.5× 34 0.4× 100 1.2k
Annie Claessens Canada 16 883 0.5× 471 0.4× 334 0.6× 141 1.0× 166 2.0× 43 1.2k
Dale R. Mutch United States 10 532 0.3× 505 0.4× 494 0.9× 77 0.6× 129 1.6× 17 1.0k
Juan E. Castillo Spain 15 756 0.4× 522 0.4× 509 1.0× 41 0.3× 47 0.6× 19 1.0k
James J. Heitholt United States 23 1.3k 0.7× 423 0.4× 329 0.6× 67 0.5× 62 0.8× 52 1.5k
Nathan L. Hartwig United States 13 644 0.3× 425 0.4× 367 0.7× 59 0.4× 109 1.3× 32 1.0k

Countries citing papers authored by G. Hardarson

Since Specialization
Citations

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

Fields of papers citing papers by G. Hardarson

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of G. Hardarson

This figure shows the co-authorship network connecting the top 25 collaborators of G. Hardarson. A scholar is included among the top collaborators of G. Hardarson 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 G. Hardarson. G. Hardarson 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.
Montañez, Adriana, et al.. (2008). Biological nitrogen fixation in maize (Zea mays L.) by 15N isotope-dilution and identification of associated culturable diazotrophs. Biology and Fertility of Soils. 45(3). 253–263. 90 indexed citations
2.
Hood‐Nowotny, Rebecca, et al.. (2000). Estimating crop N uptake from organic residues using a new approach to the 15N isotope dilution technique. Plant and Soil. 223(1-2). 33–46. 34 indexed citations
3.
Hardarson, G., et al.. (1998). Molecular microbial ecology of the soil. Results from an FAO/IAEA Co-ordinated Research Programme, 1992-1996.. Kluwer Academic Publishers eBooks.
4.
Sessitsch, Angela, Hugo Ramírez-Saad, G. Hardarson, A.D.L. Akkermans, & Willem M. de Vos. (1997). Classification of Austrian Rhizobia and the Mexican Isolate FL27 Obtained from Phaseolus vulgaris L. as Rhizobium gallicum. International Journal of Systematic Bacteriology. 47(4). 1097–1101. 26 indexed citations
5.
Sessitsch, Angela, Patrick K. Jjemba, G. Hardarson, A.D.L. Akkermans, & Kate J. Wilson. (1997). Measurement of the competitiveness index of Rhizobium tropici strain CIAT899 derivatives marked with the gusA gene. Soil Biology and Biochemistry. 29(7). 1099–1110. 28 indexed citations
6.
Sessitsch, Angela, G. Hardarson, A.D.L. Akkermans, & Willem M. de Vos. (1997). Characterization of Rhizobium etli and other Rhizobium spp. that nodulate Phaseolus vulgaris L. in an Austrian soil. Molecular Ecology. 6(7). 601–608. 28 indexed citations
7.
Bliss, Fredrick A. & G. Hardarson. (1993). Enhancement of biological nitrogen fixation of common bean in Latin America : results from an FAO/IAEA co-ordinated research programme, 1986-1991. 2 indexed citations
8.
Hardarson, G. & S. K. A. Danso. (1993). Methods for measuring biological nitrogen fixation in grain legumes. Plant and Soil. 152(1). 19–23. 56 indexed citations
9.
Hardarson, G., et al.. (1992). Biological nitrogen fixation of Gliricidia sepium/Rhizobium symbiosis as influenced by plant genotype, bacterial strain and their interactions. Tropical Agriculture. 69(4). 381–385. 16 indexed citations
10.
Sanginga, N., et al.. (1991). Variation in nodulation and N2 fixation by the Gliricidia sepium/Rhizobium spp. symbiosis in a calcareous soil. Biology and Fertility of Soils. 11(4). 273–278. 15 indexed citations
11.
Hardarson, G. & S. K. A. Danso. (1990). Use of 15 N methodology to assess biological nitrogen fixation. 13 indexed citations
12.
Hardarson, G., et al.. (1989). Nitrogen fixation in soybean (Glycine max L. merrill) as affected by nodulation patterns. Soil Biology and Biochemistry. 21(6). 783–787. 71 indexed citations
13.
Kırda, C., G. Hardarson, Felipe Zapata, & Klaus Reichardt. (1988). Spatial variability of root zone soil water status and of fertilizer N uptake by forage crops. Soil Technology. 1(3). 223–234. 7 indexed citations
14.
Hardarson, G., et al.. (1988). Estimation of residual N effect of faba bean and pea on two succeeding cereals using15N methodology. Plant and Soil. 110(1). 81–89. 80 indexed citations
15.
Zapata, Felipe, S. K. A. Danso, G. Hardarson, & Maurice Fried. (1987). Time Course of Nitrogen Fixation in Field‐Grown Soybean Using Nitrogen‐15 Methodology1. Agronomy Journal. 79(1). 172–176. 168 indexed citations
16.
Hardarson, G., et al.. (1987). Effect of combined nitrogen on nitrogen fixation of soybean (Glycine max L. Merill.) as affected by cultivar and rhizobial strain. Plant and Soil. 103(1). 45–50. 32 indexed citations
17.
Hardarson, G., Felipe Zapata, & S. K. A. Danso. (1984). Field evaluation of symbiotic nitrogen fixation by rhizobial strains using15N methodology. Plant and Soil. 82(3). 369–375. 29 indexed citations
18.
Hardarson, G., G. H. Heichel, Carroll P. Vance, & D. K. Barnes. (1981). Evaluation of Alfalfa and Rhizobium meliloti for Compatibility in Nodulation and Nodule Effectiveness1. Crop Science. 21(4). 562–567. 14 indexed citations
19.
Vance, Carroll P., L. E. B. Johnson, & G. Hardarson. (1980). Histological comparisons of plant and Rhizobium induced ineffective nodules in alfalfa. Physiological Plant Pathology. 17(2). 167–173. 29 indexed citations
20.
Jones, Donovan & G. Hardarson. (1979). Variation within and between white clover varieties in their preference for strains of Rhizobium trifolii. Annals of Applied Biology. 92(2). 221–228. 48 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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