R. J. Summerfield

7.6k total citations
175 papers, 4.9k citations indexed

About

R. J. Summerfield is a scholar working on Plant Science, Agronomy and Crop Science and Ecology, Evolution, Behavior and Systematics. According to data from OpenAlex, R. J. Summerfield has authored 175 papers receiving a total of 4.9k indexed citations (citations by other indexed papers that have themselves been cited), including 165 papers in Plant Science, 61 papers in Agronomy and Crop Science and 16 papers in Ecology, Evolution, Behavior and Systematics. Recurrent topics in R. J. Summerfield's work include Agricultural pest management studies (78 papers), Agronomic Practices and Intercropping Systems (54 papers) and Legume Nitrogen Fixing Symbiosis (52 papers). R. J. Summerfield is often cited by papers focused on Agricultural pest management studies (78 papers), Agronomic Practices and Intercropping Systems (54 papers) and Legume Nitrogen Fixing Symbiosis (52 papers). R. J. Summerfield collaborates with scholars based in United Kingdom, Australia and United States. R. J. Summerfield's co-authors include Ε. H. Roberts, R. H. Ellis, F. R. Minchin, Peter Craufurd, P. V. Vara Prasad, P. Hadley, Aiming Qi, P. A. Huxley, A. H. Bunting and Tim Wheeler and has published in prestigious journals such as Journal of Ecology, Journal of Experimental Botany and Plant Cell & Environment.

In The Last Decade

R. J. Summerfield

174 papers receiving 4.3k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
R. J. Summerfield United Kingdom 41 4.5k 1.4k 636 343 265 175 4.9k
IF Wardlaw Australia 32 3.4k 0.8× 1.7k 1.2× 507 0.8× 287 0.8× 80 0.3× 59 3.9k
D Aspinall Australia 35 3.9k 0.9× 760 0.6× 463 0.7× 949 2.8× 125 0.5× 89 4.5k
J. V. Pancho British Virgin Islands 9 3.0k 0.7× 446 0.3× 834 1.3× 455 1.3× 438 1.7× 23 3.9k
Rene C. Van Acker Canada 28 2.7k 0.6× 1.0k 0.8× 303 0.5× 562 1.6× 134 0.5× 113 3.0k
R. B. Austin United Kingdom 27 2.7k 0.6× 1.5k 1.1× 207 0.3× 260 0.8× 122 0.5× 73 3.1k
T. S. Cox United States 31 3.5k 0.8× 1.0k 0.8× 213 0.3× 486 1.4× 119 0.4× 117 4.1k
J. G. Waines United States 36 4.0k 0.9× 1.5k 1.1× 314 0.5× 459 1.3× 52 0.2× 128 4.3k
M. Fernanda Dreccer Australia 29 3.1k 0.7× 1.5k 1.1× 561 0.9× 245 0.7× 368 1.4× 53 3.5k
M. J. Gooding United Kingdom 37 3.5k 0.8× 2.3k 1.7× 308 0.5× 200 0.6× 106 0.4× 126 3.9k
Daniel F. Calderini Chile 37 4.3k 0.9× 2.8k 2.0× 472 0.7× 281 0.8× 204 0.8× 78 4.8k

Countries citing papers authored by R. J. Summerfield

Since Specialization
Citations

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

Fields of papers citing papers by R. J. Summerfield

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by R. J. Summerfield. 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 R. J. Summerfield. The network helps show where R. J. Summerfield may publish in the future.

Co-authorship network of co-authors of R. J. Summerfield

This figure shows the co-authorship network connecting the top 25 collaborators of R. J. Summerfield. A scholar is included among the top collaborators of R. J. Summerfield 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 R. J. Summerfield. R. J. Summerfield 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.
Wheeler, Tim, et al.. (1999). Selecting legume cover crops for hillside environments in Bolivia.. Mountain Research and Development. 19(4). 318–324. 5 indexed citations
2.
Keatinge, J. D. H., et al.. (1999). Potential annual sown legumes for low-income systems in the East African highlands of Southwestern Uganda. Mountain Research and Development. 19(4). 345–353. 2 indexed citations
3.
Keatinge, J. D. H., et al.. (1999). Annual legume species as green manures/cover crops in low-income farming systems of Nepal. Mountain Research and Development. 19(4). 325–332. 9 indexed citations
4.
Summerfield, R. J.. (1999). TIMING IT RIGHT : THE MEASUREMENT AND PREDICTION OF FLOWERING. Acta Agronomica Hungarica. 47(2). 203–213. 2 indexed citations
5.
Alcalde, José Antonio, Tim Wheeler, & R. J. Summerfield. (1999). Flowering genes and the photothermal flowering responses of pea ( Pisum sativum ): a re-analysis. Australian Journal of Plant Physiology. 26(4). 379–386. 4 indexed citations
6.
Summerfield, R. J., et al.. (1988). World crops : cool season food legumes : a global perspective of the problems and prospects for crop improvement in pea, lentil, faba bean and chickpea. 7 indexed citations
7.
8.
Roberts, Ε. H., P. Hadley, & R. J. Summerfield. (1985). Effects of Temperature and Photoperiod on Flowering in Chickpeas (Cicer arietinum L.). Annals of Botany. 55(6). 881–892. 80 indexed citations
9.
Neves, M. C. P., R. J. Summerfield, & F. R. Minchin. (1982). Effects of complete leaf shading during the late reproductive period on carbon and nitrogen distribution and seed production by nodule-dependent cowpea (Vigna unguiculata) plants. Tropical Agriculture. 59(3). 248–253. 3 indexed citations
10.
Stewart, K.A., et al.. (1980). Effects of contrasting aerial environments on yield potential in cowpea (Vigna unguiculata (L.) Walp.. 57(1). 43–52. 3 indexed citations
11.
Roberts, Ε. H., R. J. Summerfield, F. R. Minchin, & P. Hadley. (1980). Phenology of Chickpeas (Cicer Arietinum) in Contrasting Aerial Environments. Experimental Agriculture. 16(4). 343–360. 17 indexed citations
12.
Minchin, F. R., R. J. Summerfield, & M. C. P. Neves. (1980). Carbon Metabolism, Nitrogen Assimilation, and Seed Yield of Cowpea (Vigna unquiculataL. Walp.) Grown in an Adverse Temperature Regime. Journal of Experimental Botany. 31(5). 1327–1345. 21 indexed citations
13.
Williams, R. J., et al.. (1980). Genetic diversity in Centrosema.. Clinical Interventions in Aging. 8. 559–567. 3 indexed citations
14.
Norden, A. J., R. J. Summerfield, & A. H. Bunting. (1980). Crop improvement and genetic resources in groundnuts.. 515–523. 2 indexed citations
15.
Moss, J. P., R. J. Summerfield, & A. H. Bunting. (1980). Wild species in the improvement of groundnuts.. 525–535. 12 indexed citations
16.
Summerfield, R. J.. (1977). Vegetative growth, reproductive ontogeny and seed yield of selected tropical grain legumes.. 251–271. 2 indexed citations
17.
Eaglesham, A. R. J., F. R. Minchin, R. J. Summerfield, et al.. (1977). Nitrogen Nutrition of Cowpea (Vigna unguiculata). Experimental Agriculture. 13(4). 369–380. 61 indexed citations
18.
Minchin, F. R., et al.. (1976). Use of X‐rays as a biological micro technique: an example investigating the reproductive development of cowpea (Vigna unguiculata). Annals of Applied Biology. 84(3). 433–436. 2 indexed citations
19.
Huxley, P. A. & R. J. Summerfield. (1974). Effects of night temperature and photoperiod on the reproductive ontogeny of cultivars of cowpea and of soyabean selected for the wet tropics. Plant Science Letters. 3(1). 11–17. 21 indexed citations
20.
Summerfield, R. J.. (1973). Factors Affecting the Germination and Seedling Establishment of Narthecium Ossifragum on Mire Ecosystems. Journal of Ecology. 61(2). 387–387. 13 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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