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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 47 2563 2376 204 179 184 7557

Paul Hadley publications per year

The chart shows the history of publications by Paul Hadley between 1978 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Paul Hadley published across 48 years, from 1978 to 2025, averaging 4.1 papers a year. Output peaked at 17 publications in 1997. 4 of the 197 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1978 to 2025. Vertical axis: number of publications, 0 to 17. Peak 17 publications in 1997. 1978: 1 publication 1979: 0 publications 1980: 3 publications 1981: 1 publication 1982: 1 publication 1983: 1 publication 1984: 3 publications 1985: 3 publications 1986: 1 publication 1987: 0 publications 1988: 1 publication 1989: 3 publications 1990: 3 publications 1991: 0 publications 1992: 2 publications 1993: 4 publications 1994: 2 publications 1995: 7 publications 1996: 9 publications 1997: 17 publications 1998: 15 publications 1999: 5 publications 2000: 5 publications 2001: 3 publications 2002: 4 publications 2003: 10 publications 2004: 15 publications 2005: 2 publications 2006: 1 publication 2007: 6 publications 2008: 4 publications 2009: 1 publication 2010: 8 publications 2011: 6 publications 2012: 3 publications 2013: 4 publications 2014: 1 publication 2015: 2 publications 2016: 4 publications 2017: 7 publications 2018: 6 publications 2019: 3 publications 2020: 4 publications 2021: 6 publications 2022: 1 publication 2023: 5 publications 2024: 1 publication 2025: 3 publications
1978 2025

197 publications in total across all disciplines

View publications per year as a table
Paul Hadley: publications per year, 1978 to 2025
Year Publications
1978 1
1979 0
1980 3
1981 1
1982 1
1983 1
1984 3
1985 3
1986 1
1987 0
1988 1
1989 3
1990 3
1991 0
1992 2
1993 4
1994 2
1995 7
1996 9
1997 17
1998 15
1999 5
2000 5
2001 3
2002 4
2003 10
2004 15
2005 2
2006 1
2007 6
2008 4
2009 1
2010 8
2011 6
2012 3
2013 4
2014 1
2015 2
2016 4
2017 7
2018 6
2019 3
2020 4
2021 6
2022 1
2023 5
2024 1
2025 3
Total 197
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Paul Hadley 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 Paul Hadley 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, 181–185 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: 184 publications — 72nd percentile

72% 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 98 184
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
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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Paul Hadley 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 Paul Hadley 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, 47 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: 47 D-Index — 62nd percentile

62% 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 47
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
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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Overview

What is he best known for?

The fields of study he is best known for:

  • Botany
  • Ecology
  • Horticulture

Paul Hadley focuses on Botany, Horticulture, Agronomy, Dry weight and Sowing. His work on Anthocyanin, Light effect and photoperiodism is typically connected to Somatic embryogenesis as part of general Botany study, connecting several disciplines of science. His studies in Horticulture integrate themes in fields like Biomass, Desiccation and Irradiance.

His research in Agronomy tackles topics such as Carbon dioxide which are related to areas like Granule, Amylose and Starch. He usually deals with Dry weight and limits it to topics linked to Anthesis and Winter wheat, Grain yield, Maturity and Animal science. His research investigates the connection with Sowing and areas like Crop which intersect with concerns in Biomass.

His most cited work include:

  • Effect of High Temperature Stress at Anthesis on Grain Yield and Biomass of Field-grown Crops of Wheat (286 citations)
  • The duration and rate of grain growth, and harvest index, of wheat (Triticum aestivum L.) in response to temperature and CO2 (184 citations)
  • Growth and yield of winter wheat (Triticum aestivum) crops in response to CO2 and temperature (173 citations)

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

Horticulture, Agronomy, Botany, Sowing and photoperiodism are his primary areas of study. His Horticulture research is multidisciplinary, relying on both Photosynthesis and Crop. His Agronomy study integrates concerns from other disciplines, such as Biomass and Plant physiology.

His Botany study combines topics in areas such as Light intensity and Juvenile. His Sowing research incorporates themes from Canopy and Environmental factor. His research investigates the link between Dry weight and topics such as Carbon dioxide that cross with problems in Poaceae.

He most often published in these fields:

  • Horticulture (40.25%)
  • Agronomy (30.82%)
  • Botany (28.93%)

What were the highlights of his more recent work (between 2011-2021)?

  • Horticulture (40.25%)
  • Agronomy (30.82%)
  • Theobroma (7.55%)

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

The scientist’s investigation covers issues in Horticulture, Agronomy, Theobroma, Dry season and Climate change. His Horticulture study frequently involves adjacent topics like Botany. In general Botany, his work in Photosynthesis is often linked to Limiting linking many areas of study.

His Agronomy study incorporates themes from Sedum, Evapotranspiration and Stomatal conductance. His research investigates the connection between Theobroma and topics such as Gliricidia sepium that intersect with issues in Water content, Organic fertilizer, Soil water, Fertilizer and Field experiment. His work carried out in the field of Climate change brings together such families of science as Agroforestry, Primary production and Seasonality.

Between 2011 and 2021, his most popular works were:

  • Low relative humidity triggers RNA-directed de novo DNA methylation and suppression of genes controlling stomatal development (101 citations)
  • Transgenerational, Dynamic Methylation of Stomata Genes in Response to Low Relative Humidity (41 citations)
  • Relative importance of transpiration rate and leaf morphological traits for the regulation of leaf temperature (34 citations)

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

  • Botany
  • Ecology
  • Agriculture

Paul Hadley mainly investigates Epigenetics, Arabidopsis, DNA methylation, Methylation and Genetics. His Epigenetics research entails a greater understanding of Gene. The Mutant, Gene silencing and Locus research Paul Hadley does as part of his general Gene study is frequently linked to other disciplines of science, such as Inheritance Patterns and Penetrance, therefore creating a link between diverse domains of science.

His Arabidopsis thaliana research is multidisciplinary, incorporating perspectives in Abiotic stress and Drought tolerance.

Best Publications

  • Effect of High Temperature Stress at Anthesis on Grain Yield and Biomass of Field-grown Crops of Wheat

    Rachel Ferris;Rod Ellis;Tim Wheeler;Paul Hadley

  • The duration and rate of grain growth, and harvest index, of wheat (Triticum aestivum L.) in response to temperature and CO2

    T.R. Wheeler;T.D. Hong;R.H. Ellis;G.R. Batts

  • Growth and yield of winter wheat (Triticum aestivum) crops in response to CO2 and temperature.

    T. R. Wheeler;G. R. Batts;R. H. Ellis;P. Hadley

  • UV irradiance as a major influence on growth, development and secondary products of commercial importance in Lollo Rosso lettuce ‘Revolution’ grown under polyethylene films

    E. Tsormpatsidis;R. G. C. Henbest;Frederick John Davis;N. H. Battey

  • The physiological responses of cacao to the environment and the implications for climate change resilience. A review

    Fiona Lahive;Paul Hadley;Andrew J. Daymond

  • Changes in the flavonoid and phenolic acid contents and antioxidant activity of red leaf lettuce (Lollo Rosso) due to cultivation under plastic films varying in ultraviolet transparency.

    Paulina García-Macías;Matthew Ordidge;Eleni Vysini;Saran Waroonphan

  • Effects of CO2 and temperature on growth and yield of crops of winter wheat over four seasons

    G.R Batts;J.I.L Morison;R.H Ellis;P Hadley

  • Valorisation strategies for cocoa pod husk and its fractions

    Fei Lu;Julia Rodriguez-Garcia;Isabella Van Damme;Nicholas J. Westwood

  • Carbon and nitrogen nutrition of nodulated roots of grain legumes

    F. R. Minchin;R. J. Summerfield;P. Hadley;E. H. Roberts

  • Effects of temperature and photoperiod on flowering in chickpeas (Cicer arietinum L. )

    E. H. Roberts;P. Hadley;R. J. Summerfield

  • Low relative humidity triggers RNA-directed de novo DNA methylation and suppression of genes controlling stomatal development

    Penelope Tricker;J.George Gibbings;Carlos M Rodríguez López;Paul Hadley

  • Effects of elevated growth temperature and carbon dioxide levels on some physicochemical properties of wheat starch.

    R.F. Tester;W.R. Morrison;R.H. Ellis;J.R. Piggo

  • The influence of ultraviolet radiation on growth, photosynthesis and phenolic levels of green and red lettuce: potential for exploiting effects of ultraviolet radiation in a production system

    Evangelos Tsormpatsidis;R G C Henbest;Nicholas Hugh Battey;Paul Hadley

  • Management strategies for maximizing carbon storage and tree species diversity in cocoa-growing landscapes

    Amy S.I. Wade;Alex Asase;Paul Hadley;John Mason

  • Effects of Temperature and Photoperiod on Flowering in Soya bean [Glycine max (L.) Merrill]: a Quantitative Model

    P. Hadley;E. H. Roberts;R. J. Summerfield;F. R. Minchin

  • A Quantitative Model of Reproductive Development in Cowpea [Vigna unguiculata (L) Walp.] in relation to Photoperiod and Temperature, and Implications for Screening Germplasm

    P. Hadley;E. H. Roberts;R. J. Summerfield;F. R. Minchin

  • Genetic and environmental control of flowering in strawberry

    N.H. Battey;P. le Miere;A. Tehranifar;C. Cekic

  • Radiation Transmission and Fluorescence of Nine Greenhouse Cladding Materials

    S. Pearson;A.E. Wheldon;P. Hadley

  • Functional green roofs: Importance of plant choice in maximising summertime environmental cooling and substrate insulation potential

    M. Vaz Monteiro;T. Blanuša;T. Blanuša;A. Verhoef;M. Richardson

  • Relative importance of transpiration rate and leaf morphological traits for the regulation of leaf temperature

    Madalena Vaz Monteiro;Tijana Blanuša;Tijana Blanuša;Anne Verhoef;Paul Hadley

  • Yield and partitioning in crops of contrasting cultivars of winter wheat in response to CO2 and temperature in field studies using temperature gradient tunnels

    G. R. Batts;R. H. Ellis;J. I. L. Morison;P. N. Nkemka

  • Cryopreservation of cocoa (Theobroma cacao L.) somatic embryos for long-term germplasm storage

    Jong-Yi Fang;Andrew Wetten;Paul Hadley

  • A reanalysis of the effects of temperature and irradiance on time to flowering in chrysanthemum (Dendranthema grandiflora)

    S. Pearson;P. Hadley;A. E. Wheldon

Frequent Co-Authors

Tim Wheeler
Tim Wheeler University of Reading
Richard H. Ellis
Richard H. Ellis University of Reading
James I.L. Morison
James I.L. Morison Forestry Commission England
R. J. Summerfield
R. J. Summerfield University of Reading
E. H. Roberts
E. H. Roberts University of Reading
Peter J. Gregory
Peter J. Gregory University of Reading
Anne Verhoef
Anne Verhoef University of Reading
Michael H. Gordon
Michael H. Gordon University of Reading
Eike Luedeling
Eike Luedeling University of Bonn
Ken Norris
Ken Norris Zoological Society of London

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