James E. Harper

2.7k total citations
62 papers, 2.0k citations indexed

About

James E. Harper is a scholar working on Plant Science, Agronomy and Crop Science and Soil Science. According to data from OpenAlex, James E. Harper has authored 62 papers receiving a total of 2.0k indexed citations (citations by other indexed papers that have themselves been cited), including 58 papers in Plant Science, 13 papers in Agronomy and Crop Science and 2 papers in Soil Science. Recurrent topics in James E. Harper's work include Legume Nitrogen Fixing Symbiosis (48 papers), Plant nutrient uptake and metabolism (33 papers) and Soybean genetics and cultivation (29 papers). James E. Harper is often cited by papers focused on Legume Nitrogen Fixing Symbiosis (48 papers), Plant nutrient uptake and metabolism (33 papers) and Soybean genetics and cultivation (29 papers). James E. Harper collaborates with scholars based in United States, Japan and United Kingdom. James E. Harper's co-authors include John V. Dean, Richard H. Hageman, Steven J. Crafts‐Brandner, Myeong‐Je Cho, Méthode Bacanamwo, Georgia Shearer, Daniel H. Kohl, Frederick E. Below, Richard S. Nelson and Gary M. Paulsen and has published in prestigious journals such as PLANT PHYSIOLOGY, Journal of Experimental Botany and Plant Molecular Biology.

In The Last Decade

James E. Harper

62 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
James E. Harper United States 26 1.8k 500 294 165 82 62 2.0k
O. A. M. Lewis South Africa 20 1.2k 0.7× 135 0.3× 201 0.7× 224 1.4× 121 1.5× 43 1.6k
Donna Flesher United States 9 956 0.5× 139 0.3× 258 0.9× 109 0.7× 30 0.4× 9 1.1k
Mary E. Musgrave United States 29 1.8k 1.0× 64 0.1× 545 1.9× 65 0.4× 138 1.7× 72 2.0k
Pascal Tillard France 30 4.5k 2.5× 338 0.7× 779 2.6× 218 1.3× 68 0.8× 46 4.6k
Rudolf Tischner Germany 25 1.6k 0.9× 68 0.1× 692 2.4× 117 0.7× 119 1.5× 67 2.2k
Karl Dörffling Germany 29 1.9k 1.1× 232 0.5× 446 1.5× 134 0.8× 36 0.4× 66 2.1k
F. D. H. Macdowall Canada 18 636 0.4× 137 0.3× 170 0.6× 128 0.8× 41 0.5× 53 845
Edith Taleisnik Argentina 24 1.5k 0.9× 143 0.3× 379 1.3× 110 0.7× 42 0.5× 54 1.7k
Shoitsu Ogata Japan 19 1.3k 0.7× 447 0.9× 166 0.6× 236 1.4× 40 0.5× 42 1.5k
Jean‐Bernard Cliquet France 20 1.3k 0.7× 459 0.9× 258 0.9× 430 2.6× 142 1.7× 30 1.7k

Countries citing papers authored by James E. Harper

Since Specialization
Citations

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

Fields of papers citing papers by James E. Harper

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of James E. Harper

This figure shows the co-authorship network connecting the top 25 collaborators of James E. Harper. A scholar is included among the top collaborators of James E. 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 James E. Harper. James E. 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.
Sato, Takashi, Norikuni Ohtake, Kuni Sueyoshi, et al.. (1998). Determination of leghemoglobin components and xylem sap composition by capillary electrophoresis in hypernodulation soybean mutants cultivated in the field. Soil Science & Plant Nutrition. 44(4). 635–645. 30 indexed citations
2.
Abd‐Alla, Mohamed Hemida & James E. Harper. (1996). Reciprocal Grafting and Bacterial Strain Effects on Nodulation of Soybean Genotypes. Symbiosis. 21(2). 165–173. 4 indexed citations
3.
Kriz, Alan L., et al.. (1995). Identification of cDNA clones corresponding to two inducible nitrate reductase genes in soybean: analysis in wild-type and nr1 mutant. Plant Molecular Biology. 29(3). 491–506. 14 indexed citations
4.
Cho, Myeong‐Je & James E. Harper. (1991). Root Isoflavonoid Response to Grafting between Wild-Type and Nodulation-Mutant Soybean Plants. PLANT PHYSIOLOGY. 96(4). 1277–1282. 25 indexed citations
5.
Harper, James E., et al.. (1990). Nitrogen Fixation of Nodulation Mutants of Soybean as Affected by Nitrate. PLANT PHYSIOLOGY. 92(4). 1142–1147. 21 indexed citations
6.
Dean, John V. & James E. Harper. (1986). Nitric Oxide and Nitrous Oxide Production by Soybean and Winged Bean during the in Vivo Nitrate Reductase Assay. PLANT PHYSIOLOGY. 82(3). 718–723. 107 indexed citations
7.
Nelson, Richard S., et al.. (1985). Nitrate Reductases from Wild-Type and nr1-Mutant Soybean (Glycine max [L.] Merr.) Leaves. PLANT PHYSIOLOGY. 78(1). 80–84. 29 indexed citations
8.
Harper, James E., et al.. (1985). Exploitation of physiological and genetic variability to enhance crop productivity. 70 indexed citations
9.
Harper, James E., et al.. (1985). Uptake and Reduction of [15N]Nitrate by Intact Soybean Plants in the Dark. PLANT PHYSIOLOGY. 77(2). 365–369. 5 indexed citations
10.
Crafts‐Brandner, Steven J., Frederick E. Below, James E. Harper, & Richard H. Hageman. (1984). Differential Senescence of Maize Hybrids following Ear Removal. PLANT PHYSIOLOGY. 74(2). 360–367. 72 indexed citations
11.
Nelson, Richard S., Michael E. Horn, James E. Harper, & Jack M. Widholm. (1984). Nitrate reductase activity and nitrogenous gas evolution from heterotrophic, photomixotrophic and photoautotrophic soybean suspension cultures. Plant Science Letters. 34(1-2). 145–152. 9 indexed citations
12.
Crafts‐Brandner, Steven J., Frederick E. Below, James E. Harper, & Richard H. Hageman. (1983). Metabolism of Carbon and Nitrogen by Soybean Seedlings in Response to Vegetative Apex Removal. PLANT PHYSIOLOGY. 73(1). 6–10. 10 indexed citations
13.
Harper, James E., et al.. (1980). Effect of Light, Dark, and Temperature on Root Nodule Activity (Acetylene Reduction) of Soybeans. PLANT PHYSIOLOGY. 65(1). 51–56. 49 indexed citations
14.
Harper, James E., et al.. (1978). Nitrogen Metabolism of Soybeans. PLANT PHYSIOLOGY. 62(4). 662–664. 25 indexed citations
15.
Harper, James E., et al.. (1976). Nitrate Reductase Activity in Soybeans (Glycine max [L.] Merr.). PLANT PHYSIOLOGY. 58(6). 736–739. 27 indexed citations
16.
Harper, James E., et al.. (1972). European economic history. Appleton-Century-Crofts eBooks. 2 indexed citations
17.
Harper, James E. & Gary M. Paulsen. (1969). Nitrogen Assimilation and Protein Synthesis in Wheat Seedlings As Affected by Mineral Nutrition. I. Macronutrients. PLANT PHYSIOLOGY. 44(1). 69–74. 30 indexed citations
18.
Harper, James E. & Gary M. Paulsen. (1969). Nitrogen Assimilation and Protein Synthesis in Wheat Seedlings as Affected by Mineral Nutrition. II. Micronutrients. PLANT PHYSIOLOGY. 44(5). 636–640. 7 indexed citations
19.
Paulsen, Gary M. & James E. Harper. (1968). Evidence for a Role of Calcium in Nitrate Assimilation in Wheat Seedlings. PLANT PHYSIOLOGY. 43(5). 775–780. 22 indexed citations
20.
Harper, James E.. (1955). Dr. W. A. F. Browne. Proceedings of the Royal Society of Medicine. 48(8). 590–593. 1 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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