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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Plant Science and Agronomy 85 349 325 36 30 296 22775

Janet I. Sprent publications per year

The chart shows the history of publications by Janet I. Sprent between 1957 and 2022, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Janet I. Sprent published across 66 years, from 1957 to 2022, averaging 4.5 papers a year. Output peaked at 14 publications in 2009. 3 of the 299 publications appeared in the last two years.

No. of publications
5 10
Bar chart. Horizontal axis: year, 1957 to 2022. Vertical axis: number of publications, 0 to 14. Peak 14 publications in 2009. 1957: 1 publication 1958: 1 publication 1959: 0 publications 1960: 0 publications 1961: 0 publications 1962: 0 publications 1963: 0 publications 1964: 0 publications 1965: 0 publications 1966: 2 publications 1967: 2 publications 1968: 2 publications 1969: 3 publications 1970: 0 publications 1971: 2 publications 1972: 2 publications 1973: 3 publications 1974: 1 publication 1975: 3 publications 1976: 3 publications 1977: 2 publications 1978: 6 publications 1979: 1 publication 1980: 3 publications 1981: 0 publications 1982: 3 publications 1983: 2 publications 1984: 13 publications 1985: 4 publications 1986: 6 publications 1987: 10 publications 1988: 8 publications 1989: 10 publications 1990: 13 publications 1991: 4 publications 1992: 9 publications 1993: 11 publications 1994: 7 publications 1995: 9 publications 1996: 9 publications 1997: 12 publications 1998: 9 publications 1999: 5 publications 2000: 6 publications 2001: 7 publications 2002: 10 publications 2003: 4 publications 2004: 1 publication 2005: 9 publications 2006: 2 publications 2007: 9 publications 2008: 9 publications 2009: 14 publications 2010: 4 publications 2011: 6 publications 2012: 7 publications 2013: 10 publications 2014: 2 publications 2015: 2 publications 2016: 4 publications 2017: 4 publications 2018: 3 publications 2019: 0 publications 2020: 2 publications 2021: 0 publications 2022: 3 publications
1957 2022

299 publications in total across all disciplines

View publications per year as a table
Janet I. Sprent: publications per year, 1957 to 2022
Year Publications
1957 1
1958 1
1959 0
1960 0
1961 0
1962 0
1963 0
1964 0
1965 0
1966 2
1967 2
1968 2
1969 3
1970 0
1971 2
1972 2
1973 3
1974 1
1975 3
1976 3
1977 2
1978 6
1979 1
1980 3
1981 0
1982 3
1983 2
1984 13
1985 4
1986 6
1987 10
1988 8
1989 10
1990 13
1991 4
1992 9
1993 11
1994 7
1995 9
1996 9
1997 12
1998 9
1999 5
2000 6
2001 7
2002 10
2003 4
2004 1
2005 9
2006 2
2007 9
2008 9
2009 14
2010 4
2011 6
2012 7
2013 10
2014 2
2015 2
2016 4
2017 4
2018 3
2019 0
2020 2
2021 0
2022 3
Total 299
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Janet I. Sprent publication distribution in Plant Science and Agronomy in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Plant Science and Agronomy in 2026. The highlighted bar marks where Janet I. Sprent sits on this spectrum.

No. of scientists
50 100 150 200 250
Bar chart with 88 bars. Horizontal axis: publications, 36–40 to 467+. Vertical axis: number of scientists, 0 to 255. Most scientists, 255, have 111–115 publications. The last bar groups every scientist with 467 publications or more. The highlighted bar, 296–300 publications, is where this scientist sits. 36–40 publications: 2 scientists 41–45 publications: 7 scientists 46–50 publications: 40 scientists 51–55 publications: 58 scientists 56–60 publications: 60 scientists 61–65 publications: 107 scientists 66–70 publications: 130 scientists 71–75 publications: 153 scientists 76–80 publications: 191 scientists 81–85 publications: 199 scientists 86–90 publications: 206 scientists 91–95 publications: 218 scientists 96–100 publications: 226 scientists 101–105 publications: 227 scientists 106–110 publications: 247 scientists 111–115 publications: 255 scientists 116–120 publications: 253 scientists 121–125 publications: 233 scientists 126–130 publications: 219 scientists 131–135 publications: 201 scientists 136–140 publications: 194 scientists 141–145 publications: 176 scientists 146–150 publications: 157 scientists 151–155 publications: 147 scientists 156–160 publications: 151 scientists 161–165 publications: 159 scientists 166–170 publications: 137 scientists 171–175 publications: 128 scientists 176–180 publications: 126 scientists 181–185 publications: 98 scientists 186–190 publications: 114 scientists 191–195 publications: 100 scientists 196–200 publications: 90 scientists 201–205 publications: 71 scientists 206–210 publications: 98 scientists 211–215 publications: 70 scientists 216–220 publications: 86 scientists 221–225 publications: 61 scientists 226–230 publications: 58 scientists 231–235 publications: 53 scientists 236–240 publications: 64 scientists 241–245 publications: 39 scientists 246–250 publications: 46 scientists 251–255 publications: 51 scientists 256–260 publications: 36 scientists 261–265 publications: 44 scientists 266–270 publications: 35 scientists 271–275 publications: 30 scientists 276–280 publications: 33 scientists 281–285 publications: 35 scientists 286–290 publications: 36 scientists 291–295 publications: 26 scientists 296–300 publications: 26 scientists 301–305 publications: 31 scientists 306–310 publications: 30 scientists 311–315 publications: 21 scientists 316–320 publications: 29 scientists 321–325 publications: 14 scientists 326–330 publications: 15 scientists 331–335 publications: 15 scientists 336–340 publications: 17 scientists 341–345 publications: 15 scientists 346–350 publications: 12 scientists 351–355 publications: 17 scientists 356–360 publications: 18 scientists 361–365 publications: 12 scientists 366–370 publications: 11 scientists 371–375 publications: 6 scientists 376–380 publications: 6 scientists 381–385 publications: 11 scientists 386–390 publications: 9 scientists 391–395 publications: 10 scientists 396–400 publications: 8 scientists 401–405 publications: 4 scientists 406–410 publications: 9 scientists 411–415 publications: 11 scientists 416–420 publications: 4 scientists 421–425 publications: 7 scientists 426–430 publications: 4 scientists 431–435 publications: 3 scientists 436–440 publications: 5 scientists 441–445 publications: 8 scientists 446–450 publications: 6 scientists 451–455 publications: 7 scientists 456–460 publications: 5 scientists 461–465 publications: 6 scientists 466 publications: 2 scientists 467+ publications: 99 scientists
36–40 publications 467+

This scientist: 296 publications — 92nd percentile

92% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 467 publications or more.

View publications distribution as a table
Number of Plant Science and Agronomy scientists by publication count, Research.com 2026 ranking edition. Based on 6,494 ranked scientists.
Publications Scientists This scientist
36–40 2
41–45 7
46–50 40
51–55 58
56–60 60
61–65 107
66–70 130
71–75 153
76–80 191
81–85 199
86–90 206
91–95 218
96–100 226
101–105 227
106–110 247
111–115 255
116–120 253
121–125 233
126–130 219
131–135 201
136–140 194
141–145 176
146–150 157
151–155 147
156–160 151
161–165 159
166–170 137
171–175 128
176–180 126
181–185 98
186–190 114
191–195 100
196–200 90
201–205 71
206–210 98
211–215 70
216–220 86
221–225 61
226–230 58
231–235 53
236–240 64
241–245 39
246–250 46
251–255 51
256–260 36
261–265 44
266–270 35
271–275 30
276–280 33
281–285 35
286–290 36
291–295 26
296–300 26 296
301–305 31
306–310 30
311–315 21
316–320 29
321–325 14
326–330 15
331–335 15
336–340 17
341–345 15
346–350 12
351–355 17
356–360 18
361–365 12
366–370 11
371–375 6
376–380 6
381–385 11
386–390 9
391–395 10
396–400 8
401–405 4
406–410 9
411–415 11
416–420 4
421–425 7
426–430 4
431–435 3
436–440 5
441–445 8
446–450 6
451–455 7
456–460 5
461–465 6
466 2
467+ 99
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Janet I. Sprent D-index placement in Plant Science and Agronomy in 2026

The chart shows the D-index (discipline H-index) distribution of Plant Science and Agronomy scientists ranked by Research.com in 2026. The highlighted bar marks where Janet I. Sprent sits on this spectrum.

No. of scientists
50 100 150 200 250
Bar chart with 80 bars. Horizontal axis: D-Index, 30 to 109+. Vertical axis: number of scientists, 0 to 288. Most scientists, 288, have 34 D-Index. The last bar groups every scientist with 109 D-Index or more. The highlighted bar, 85 D-Index, is where this scientist sits. 30 D-Index: 200 scientists 31 D-Index: 236 scientists 32 D-Index: 253 scientists 33 D-Index: 283 scientists 34 D-Index: 288 scientists 35 D-Index: 240 scientists 36 D-Index: 246 scientists 37 D-Index: 243 scientists 38 D-Index: 247 scientists 39 D-Index: 229 scientists 40 D-Index: 232 scientists 41 D-Index: 230 scientists 42 D-Index: 228 scientists 43 D-Index: 219 scientists 44 D-Index: 193 scientists 45 D-Index: 164 scientists 46 D-Index: 158 scientists 47 D-Index: 143 scientists 48 D-Index: 131 scientists 49 D-Index: 127 scientists 50 D-Index: 122 scientists 51 D-Index: 122 scientists 52 D-Index: 110 scientists 53 D-Index: 102 scientists 54 D-Index: 98 scientists 55 D-Index: 79 scientists 56 D-Index: 85 scientists 57 D-Index: 88 scientists 58 D-Index: 91 scientists 59 D-Index: 62 scientists 60 D-Index: 61 scientists 61 D-Index: 59 scientists 62 D-Index: 54 scientists 63 D-Index: 61 scientists 64 D-Index: 59 scientists 65 D-Index: 58 scientists 66 D-Index: 41 scientists 67 D-Index: 49 scientists 68 D-Index: 39 scientists 69 D-Index: 32 scientists 70 D-Index: 40 scientists 71 D-Index: 47 scientists 72 D-Index: 38 scientists 73 D-Index: 28 scientists 74 D-Index: 29 scientists 75 D-Index: 28 scientists 76 D-Index: 22 scientists 77 D-Index: 21 scientists 78 D-Index: 25 scientists 79 D-Index: 26 scientists 80 D-Index: 19 scientists 81 D-Index: 16 scientists 82 D-Index: 12 scientists 83 D-Index: 16 scientists 84 D-Index: 14 scientists 85 D-Index: 11 scientists 86 D-Index: 17 scientists 87 D-Index: 13 scientists 88 D-Index: 10 scientists 89 D-Index: 12 scientists 90 D-Index: 18 scientists 91 D-Index: 16 scientists 92 D-Index: 16 scientists 93 D-Index: 17 scientists 94 D-Index: 12 scientists 95 D-Index: 8 scientists 96 D-Index: 9 scientists 97 D-Index: 9 scientists 98 D-Index: 11 scientists 99 D-Index: 12 scientists 100 D-Index: 5 scientists 101 D-Index: 8 scientists 102 D-Index: 4 scientists 103 D-Index: 11 scientists 104 D-Index: 5 scientists 105 D-Index: 9 scientists 106 D-Index: 7 scientists 107 D-Index: 4 scientists 108 D-Index: 8 scientists 109+ D-Index: 99 scientists
30 D-Index 109+

This scientist: 85 D-Index — 95th percentile

95% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 109 D-Index or more.

View D-Index distribution as a table
Number of Plant Science and Agronomy scientists by D-index, Research.com 2026 ranking edition. Based on 6,494 ranked scientists.
D-Index Scientists This scientist
30 200
31 236
32 253
33 283
34 288
35 240
36 246
37 243
38 247
39 229
40 232
41 230
42 228
43 219
44 193
45 164
46 158
47 143
48 131
49 127
50 122
51 122
52 110
53 102
54 98
55 79
56 85
57 88
58 91
59 62
60 61
61 59
62 54
63 61
64 59
65 58
66 41
67 49
68 39
69 32
70 40
71 47
72 38
73 28
74 29
75 28
76 22
77 21
78 25
79 26
80 19
81 16
82 12
83 16
84 14
85 11 85
86 17
87 13
88 10
89 12
90 18
91 16
92 16
93 17
94 12
95 8
96 9
97 9
98 11
99 12
100 5
101 8
102 4
103 11
104 5
105 9
106 7
107 4
108 8
109+ 99
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Research.com Recognitions

  • 1990 - Fellow of the Royal Society of Edinburgh

Overview

What is she best known for?

The fields of study she is best known for:

  • Botany
  • Ecology
  • Bacteria

The scientist’s investigation covers issues in Botany, Nitrogen fixation, Root nodule, Burkholderia phymatum and Rhizobia. Her studies deal with areas such as Mesorhizobium, Nitrogenase and Rhizobium as well as Botany. Her studies in Nitrogen fixation integrate themes in fields like Ecology, Fabaceae, Caesalpinioideae, Agronomy and Symbiosis.

Her study focuses on the intersection of Symbiosis and fields such as Cyanobacteria with connections in the field of Fixation and Aquatic ecosystem. As a part of the same scientific family, Janet I. Sprent mostly works in the field of Root nodule, focusing on Water stress and, on occasion, Respiratory system and Glycine. Her work deals with themes such as Cupriavidus taiwanensis and Microbiology, which intersect with Burkholderia phymatum.

Her most cited work include:

  • Towards an ecological understanding of biological nitrogen fixation (667 citations)
  • A new subfamily classification of the leguminosae based on a taxonomically comprehensive phylogeny (368 citations)
  • Nodulation in Legumes (336 citations)

What are the main themes of her work throughout her whole career to date?

The scientist’s investigation covers issues in Botany, Nitrogen fixation, Root nodule, Rhizobia and Agronomy. Her Botany research is multidisciplinary, incorporating elements of Rhizobium, Burkholderia phymatum, Burkholderia and Microbiology. Her Rhizobium research is multidisciplinary, relying on both Rhizobiaceae and Caesalpinioideae.

The Nitrogen fixation study combines topics in areas such as Cyanobacteria, Ecology, Chamaecrista and Symbiosis. Her Root nodule research focuses on Nodule and how it relates to Leghemoglobin. The concepts of her Rhizobia study are interwoven with issues in Taxonomy, Acacia, Phylogenetics and Root hair.

She most often published in these fields:

  • Botany (60.34%)
  • Nitrogen fixation (35.44%)
  • Root nodule (24.05%)

What were the highlights of her more recent work (between 2006-2018)?

  • Botany (60.34%)
  • Nitrogen fixation (35.44%)
  • Rhizobia (23.63%)

In recent papers she was focusing on the following fields of study:

Janet I. Sprent mainly investigates Botany, Nitrogen fixation, Rhizobia, Burkholderia and Ecology. Her work carried out in the field of Botany brings together such families of science as Symbiosis, Root nodule, Agronomy and Rhizobium. Her work in the fields of Nitrogenase overlaps with other areas such as Nodule.

Her work on Mesorhizobium as part of general Rhizobia research is often related to Betaproteobacteria, thus linking different fields of science. Her research integrates issues of Phaseoleae, Microbiology and Cupriavidus in her study of Burkholderia. Her work in the fields of Ecology, such as Chamaecrista fasciculata, Ecology, Mediterranean ecosystem and Tropical and subtropical moist broadleaf forests, intersects with other areas such as Global distribution.

Between 2006 and 2018, her most popular works were:

  • A new subfamily classification of the leguminosae based on a taxonomically comprehensive phylogeny (368 citations)
  • Evolving ideas of legume evolution and diversity: a taxonomic perspective on the occurrence of nodulation (329 citations)
  • Legume-nodulating betaproteobacteria: diversity, host range, and future prospects. (257 citations)

In her most recent research, the most cited papers focused on:

  • Botany
  • Ecology
  • Bacteria

Botany, Burkholderia, Nitrogen fixation, Burkholderia phymatum and Rhizobia are her primary areas of study. Her Botany research is multidisciplinary, incorporating perspectives in Mesorhizobium, Symbiosis, Root nodule and Rhizobium. She usually deals with Symbiosis and limits it to topics linked to Evolutionary biology and Horizontal gene transfer, Species complex and Introduced species.

Her Rhizobium research incorporates themes from Sinorhizobium and Caesalpinioideae. Janet I. Sprent has researched Nitrogen fixation in several fields, including Legume, Agronomy, Fabaceae, Agriculture and Biogeography. Her work in Rhizobia addresses issues such as Host, which are connected to fields such as Soil microbiology and Phylogenetics.

Best Publications

  • Towards an ecological understanding of biological nitrogen fixation

    Peter M. Vitousek;Ken Cassman;Cory Cleveland;Tim Crews

  • A new subfamily classification of the leguminosae based on a taxonomically comprehensive phylogeny

    Nasim Azani;Marielle Babineau;C. Donovan Bailey;Hannah Banks

  • Evolving ideas of legume evolution and diversity: a taxonomic perspective on the occurrence of nodulation

    Janet I. Sprent

  • Nodulation in Legumes

    Janet I. Sprent

  • Detection of genetic variation between and within populations of Gliricidia sepium and G. maculata using RAPD markers

    K J Chalmers;R Waugh;J I Sprent;A J Simons

  • Legume-Nodulating Betaproteobacteria: Diversity, Host Range, and Future Prospects

    Prasad Gyaneshwar;Ann M Hirsch;Lionel Moulin;Wen-Ming Chen

  • Occurrence of nodulation in the Leguminosae

    S. M. De Faria;G. P. Lewis;J. I. Sprent;J. M. Sutherland

  • Nitrogen Fixing Organisms

    C. R. Hipkin;J. I. Sprent;P. Sprent

  • Biogeography of nodulated legumes and their nitrogen-fixing symbionts

    Janet I. Sprent;Julie Ardley;Euan K. James

  • The dalbergioid legumes (Fabaceae): delimitation of a pantropical monophyletic clade

    Matt Lavin;R. Toby Pennington;Bente B. Klitgaard;Janet I. Sprent

  • Nitrogen Fixing Organisms: Pure and Applied Aspects

    Janet I. Sprent;Peter Sprent

  • Burkholderia species are ancient symbionts of legumes

    Cyril Bontemps;Geoffrey N. Elliott;Marcelo F. Simon;Fábio B. Dos Reis Júnior

  • Legume Nodulation: A Global Perspective

    Janet I. Sprent

  • Legumes are different: Leaf nitrogen, photosynthesis, and water use efficiency

    Mark Andrew Adams;Tarryn L. Turnbull;Janet I. Sprent;Nina Buchmann

  • Effects of sodium chloride and polyethylene glycol on root-hair infection and nodulation of Vicia faba L. plants by Rhizobium leguminosarum

    H. H. Zahran;J. I. Sprent

  • Legume Evolution: Where Do Nodules and Mycorrhizas Fit In?

    Janet I. Sprent;Euan K. James

  • Nodule growth and activity may be regulated by a feedback mechanism involving phloem nitrogen

    R. Parsons;A. Stanforth;J. A. Raven;J. I. Sprent

  • Burkholderia phymatum is a highly effective nitrogen-fixing symbiont of Mimosa spp. and fixes nitrogen ex planta.

    Geoffrey N. Elliott;Wen-Ming Chen;Jui-Hsing Chou;Hui-Chun Wang

  • The Ecology of the Nitrogen Cycle

    Janet I. Sprent

  • Proof that Burkholderia strains form effective symbioses with legumes: a study of novel Mimosa-nodulating strains from South America.

    Wen-Ming Chen;Sergio M. de Faria;Rosângela Straliotto;Rosa M. Pitard

  • Burkholderia mimosarum sp. nov., isolated from root nodules of Mimosa spp. from Taiwan and South America

    Wen-Ming Chen;Euan K. James;Tom Coenye;Jui-Hsing Chou

  • Amplified fragment length polymorphism (AFLP) analysis of genetic variation in Moringa oleifera Lam.

    Geoffrey M. Muluvi;J. I. Sprent;N. Soranzo;J. Provan

  • Nitrogen fixation in legume and non-legume trees.

    Janet I. Sprent;Richard Parsons

  • The Ecology of the Nitrogen Cycle.

    R. H. Marrs;J. I. Sprent

Frequent Co-Authors

Euan K. James
Euan K. James James Hutton Institute
Wen-Ming Chen
Wen-Ming Chen Fudan University
J. Peter W. Young
J. Peter W. Young University of York
John A. Raven
John A. Raven University of Dundee
Sergio Miana de Faria
Sergio Miana de Faria Brazilian Agricultural Research Corporation
Mitchell Andrews
Mitchell Andrews Lincoln University
Marcelo F. Simon
Marcelo F. Simon Brazilian Agricultural Research Corporation
E. K. U. Gross
E. K. U. Gross Hebrew University of Jerusalem
F. R. Minchin
F. R. Minchin Aberystwyth University
Erik Smets
Erik Smets Naturalis Biodiversity Center

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