Stephen Harper

490 total citations
42 papers, 336 citations indexed

About

Stephen Harper is a scholar working on Plant Science, Soil Science and Cell Biology. According to data from OpenAlex, Stephen Harper has authored 42 papers receiving a total of 336 indexed citations (citations by other indexed papers that have themselves been cited), including 30 papers in Plant Science, 10 papers in Soil Science and 5 papers in Cell Biology. Recurrent topics in Stephen Harper's work include Garlic and Onion Studies (8 papers), Plant-Microbe Interactions and Immunity (5 papers) and Plant Micronutrient Interactions and Effects (5 papers). Stephen Harper is often cited by papers focused on Garlic and Onion Studies (8 papers), Plant-Microbe Interactions and Immunity (5 papers) and Plant Micronutrient Interactions and Effects (5 papers). Stephen Harper collaborates with scholars based in Australia, Indonesia and United Kingdom. Stephen Harper's co-authors include Neal W. Menzies, Tim J. O’Hare, John W. Mansfıeld, D. G. Edwards, G. L. Kerven, Ian R. Brown, C. J. Asher, M. J. Bell, Peter M. Kopittke and Ryosuke Fujinuma and has published in prestigious journals such as SHILAP Revista de lepidopterología, Soil Biology and Biochemistry and Journal of Experimental Botany.

In The Last Decade

Stephen Harper

39 papers receiving 318 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Stephen Harper Australia 13 231 88 32 24 23 42 336
Chuanzong Li China 6 170 0.7× 71 0.8× 21 0.7× 32 1.3× 28 1.2× 11 264
Vishal Singh Rana India 12 282 1.2× 53 0.6× 24 0.8× 25 1.0× 57 2.5× 64 444
Annum Sattar Pakistan 5 211 0.9× 57 0.6× 20 0.6× 21 0.9× 22 1.0× 7 300
Shaimaa Abd-Elrahman Egypt 9 244 1.1× 106 1.2× 19 0.6× 50 2.1× 25 1.1× 31 352
Ragab S. Taha Egypt 8 420 1.8× 109 1.2× 19 0.6× 43 1.8× 49 2.1× 10 494
İnayatullah Rajpar Pakistan 11 268 1.2× 136 1.5× 17 0.5× 71 3.0× 27 1.2× 57 368
Lansheng Deng China 9 157 0.7× 77 0.9× 26 0.8× 26 1.1× 24 1.0× 15 313
Jianchuan Sha China 6 332 1.4× 86 1.0× 14 0.4× 27 1.1× 66 2.9× 7 432
Ifeyinwa Monica Uzoh Nigeria 6 221 1.0× 74 0.8× 15 0.5× 64 2.7× 24 1.0× 8 401

Countries citing papers authored by Stephen Harper

Since Specialization
Citations

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

Fields of papers citing papers by Stephen Harper

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Stephen Harper

This figure shows the co-authorship network connecting the top 25 collaborators of Stephen Harper. A scholar is included among the top collaborators of Stephen Harper 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 Stephen Harper. Stephen Harper 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.
Kopittke, Peter M., et al.. (2025). Soil degradation: An integrated model of the causes and drivers. International Soil and Water Conservation Research. 13(4). 744–755. 3 indexed citations
2.
Hong, Hung T., et al.. (2025). A Modified Extraction and Saponification Method for the Determination of Carotenoids in the Fruit of Capsicum annuum. Agriculture. 15(6). 646–646. 1 indexed citations
3.
Nguyen, Binh T., J. Bernhard Wehr, Peter M. Kopittke, et al.. (2024). Benchmarking Bulb Yield, Medicinal Sulfur Compounds, and Mineral Nutrition of Garlic Varieties. ACS Omega. 9(45). 45240–45250. 4 indexed citations
4.
Geering, Andrew D. W., et al.. (2024). First report of iris yellow spot virus infecting shallot (Allium cepa var. aggregatum) in Australia. Australasian Plant Pathology. 53(6). 593–596.
5.
Harper, Stephen & Neal W. Menzies. (2023). Phytotoxic Effects of Al on Root Growth Are Confounded in the Presence of Fulvic and Humic Acids. Soil Systems. 7(3). 68–68. 3 indexed citations
6.
Widiastuti, Ani, et al.. (2023). Incidence of twisted disease and cultivation practice of shallot farmers in Bantul coastal area, Yogyakarta, Indonesia. JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA. 23(1). 23–30. 2 indexed citations
7.
Sulistyaningsih, Endang, et al.. (2022). Phenological growth stage of tropical shallot (Allium cepa L. Aggregatum group) planted from seed in lowland area based on the BBCH scale. Annals of Applied Biology. 182(2). 257–266. 2 indexed citations
8.
Nguyen, Binh T., et al.. (2022). Sulfur Nutrition Affects Garlic Bulb Yield and Allicin Concentration. Plants. 11(19). 2571–2571. 5 indexed citations
9.
Nguyen, Binh T., Hung T. Hong, Tim J. O’Hare, et al.. (2021). A rapid and simplified methodology for the extraction and quantification of allicin in garlic. Journal of Food Composition and Analysis. 104. 104114–104114. 22 indexed citations
10.
O’Hare, Tim J., et al.. (2020). Variation in zinc concentration of sweetcorn kernels reflects source–sink dynamics influenced by kernel number. Journal of Experimental Botany. 71(16). 4985–4992. 5 indexed citations
11.
O’Hare, Tim J., et al.. (2020). Zinc biofortification of immature maize and sweetcorn (Zea mays L.) kernels for human health. Scientia Horticulturae. 272. 109559–109559. 9 indexed citations
12.
Nguyen, Binh T., et al.. (2019). The Relationship Between Bulb Yield and Allicin Concentration in Garlic Varieties. SHILAP Revista de lepidopterología. 28–28. 3 indexed citations
13.
Kopittke, Peter M., et al.. (2019). Speciation and accumulation of Zn in sweetcorn kernels for genetic and agronomic biofortification programs. Planta. 250(1). 219–227. 13 indexed citations
14.
Harper, Stephen, et al.. (2017). Growth and yield response of glasshouse- and field-grown sweetpotato to nitrogen supply. Nutrient Cycling in Agroecosystems. 108(3). 309–321. 29 indexed citations
15.
16.
McTaggart, Alistair R., et al.. (2015). Pseudomonas syringaepv.porri: a new pathogen of Australian onions. Acta Horticulturae. 149–154. 2 indexed citations
17.
Dalal, Ram C., et al.. (2011). Effect of fresh green waste and green waste compost on mineral nitrogen, nitrous oxide and carbon dioxide from a Vertisol. Waste Management. 31(8). 1720–1728. 22 indexed citations
18.
Diatloff, Eugene, Stephen Harper, C. J. Asher, & F. W. Smith. (1998). Effects of humic and fulvic acids on the rhizotoxicity of lanthanum and aluminium to corn. Australian Journal of Soil Research. 36(6). 913–920. 17 indexed citations
19.
Harper, Stephen, D. G. Edwards, G. L. Kerven, & C. J. Asher. (1995). Effects of organic acid fractions extracted from Eucalyptus camaldulensis leaves on root elongation of maize (Zea mays) in the presence and absence of aluminium. Plant and Soil. 171(1). 189–192. 20 indexed citations
20.

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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