World's Best Scientists 2026 revealed!

D-Index & Metrics

Plant Science and Agronomy

D-Index
51
Citations
9863
World Ranking
2015
National Ranking
530

Richard B. Thomas 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 Richard B. Thomas sits on this spectrum.

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 publications 467+

This scientist: 80 publications — 12th percentile

12% of scientists in this discipline score the same or lower.

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

Richard B. Thomas 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 Richard B. Thomas sits on this spectrum.

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: 51 D-Index — 70th percentile

70% of scientists in this discipline score the same or lower.

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

Overview

What is he best known for?

The fields of study he is best known for:

  • Ecology
  • Botany
  • Ecosystem

Richard B. Thomas spends much of his time researching Photosynthesis, Botany, Carbon dioxide, Stomatal conductance and Agronomy. His studies deal with areas such as Ecology, Acclimatization and Carbon cycle as well as Photosynthesis. The Botany study combines topics in areas such as Biomass and Horticulture.

His Carbon dioxide research incorporates themes from Nutrient and Malvaceae. In his study, Photosynthetic acclimation, Biomass, Shoot and Starch is inextricably linked to Photosynthetic capacity, which falls within the broad field of Stomatal conductance. His Agronomy research includes themes of Primary production and Carbon dioxide in Earth's atmosphere.

His most cited work include:

  • Modelling photosynthesis of cotton grown in elevated CO2 (671 citations)
  • Root Restriction as a Factor in Photosynthetic Acclimation of Cotton Seedlings Grown in Elevated Carbon Dioxide (404 citations)
  • Net primary production of a forest ecosystem with experimental CO2 enrichment (403 citations)

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

Richard B. Thomas mostly deals with Botany, Photosynthesis, Carbon dioxide, Horticulture and Agronomy. His Botany research is multidisciplinary, incorporating perspectives in Nutrient and Animal science. The concepts of his Photosynthesis study are interwoven with issues in Acclimatization and Understory.

His Carbon dioxide research is multidisciplinary, incorporating elements of Dry weight, Phytotron, Malvaceae and Respiration. His Horticulture study combines topics from a wide range of disciplines, such as Neodiprion lecontei, Starch, Growing season and Sawfly. His studies in Agronomy integrate themes in fields like Nitrogen fixation, Reproduction, Rhizobium and Plant litter.

He most often published in these fields:

  • Botany (54.93%)
  • Photosynthesis (40.85%)
  • Carbon dioxide (38.03%)

What were the highlights of his more recent work (between 2006-2021)?

  • Ecology (15.49%)
  • Ecosystem (14.08%)
  • Photosynthesis (40.85%)

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

His primary areas of investigation include Ecology, Ecosystem, Photosynthesis, Stomatal conductance and Dendrochronology. His work on Forest ecology, Climate change, Climate model and Global warming as part of his general Ecology study is frequently connected to Toxicodendron radicans, thereby bridging the divide between different branches of science. His study on Primary production is often connected to Landscape ecology as part of broader study in Ecosystem.

The subject of his Photosynthesis research is within the realm of Botany. His research investigates the connection between Botany and topics such as Horticulture that intersect with issues in Growing season. His biological study spans a wide range of topics, including Acclimatization, Carbon dioxide, Tree species and Animal science.

Between 2006 and 2021, his most popular works were:

  • Forest carbon use efficiency: is respiration a constant fraction of gross primary production? (319 citations)
  • Elevated CO2 affects photosynthetic responses in canopy pine and subcanopy deciduous trees over 10 years: a synthesis from Duke FACE (119 citations)
  • Elevated temperatures increase leaf senescence and root secondary metabolite concentrations in the understory herb Panax quinquefolius (Araliaceae). (96 citations)

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

  • Ecology
  • Botany
  • Ecosystem

His primary scientific interests are in Ecosystem, Forest ecology, Understory, Deciduous and Photosynthesis. Richard B. Thomas has included themes like Experimental forest, Felling, Ecological succession, Clearcutting and Carbon sequestration in his Ecosystem study. His work deals with themes such as Agroforestry, Primary production and Temperate deciduous forest, which intersect with Forest ecology.

His Understory research integrates issues from Growing season, Horticulture and Stomatal conductance. His study in Deciduous is interdisciplinary in nature, drawing from both Liquidambar styraciflua, Canopy and Crown. The various areas that Richard B. Thomas examines in his Biomass study include Carbon cycle and Taiga.

Best Publications

  • Modelling photosynthesis of cotton grown in elevated CO2

    P. C. Harley;R. B. Thomas;J. F. Reynolds;B. R. Strain

  • Net primary production of a forest ecosystem with experimental CO2 enrichment

    Evan H. DeLucia;Jason G. Hamilton;Shawna L. Naidu;Richard B. Thomas

  • Root Restriction as a Factor in Photosynthetic Acclimation of Cotton Seedlings Grown in Elevated Carbon Dioxide

    Richard B. Thomas;Boyd R. Strain

  • Forest carbon use efficiency: is respiration a constant fraction of gross primary production?

    Evan H. DeLUCIA;John E. Drake;Richard B. Thomas;Miquel Gonzalez-Meler

  • Primary productivity of planet earth: biological determinants and physical constraints in terrestrial and aquatic habitats

    Richard J. Geider;Evan H. Delucia;Paul G. Falkowski;Adrien C. Finzi

  • Long‐term effects of elevated CO2 and nutrients on photosynthesis and rubisco in loblolly pine seedlings

    D. T. Tissue;R. B. Thomas;B. R. Strain

  • Atmospheric CO2 enrichment increases growth and photosynthesis of Pinus taeda: a 4 year experiment in the field

    D. T. Tissue;R. B. Thomas;B. R. Strain

  • Comparative responses of model C3 and C4 plants to drought in low and elevated CO2

    JoY. K. Ward;David T. Tissue;Richard B. Thomas

  • Biomass and toxicity responses of poison ivy (Toxicodendron radicans) to elevated atmospheric CO2

    Jacqueline E. Mohan;Lewis H. Ziska;William H. Schlesinger;Richard B. Thomas

  • Elevated temperatures increase leaf senescence and root secondary metabolite concentrations in the understory herb Panax quinquefolius (Araliaceae).

    Gera M. Jochum;Kenneth W. Mudge;Richard B. Thomas

  • Effects of low and elevated CO2 on C3 and C4 annuals. I. Growth and biomass allocation

    J.K. Dippery;D.T. Tissue;R.B. Thomas;B.R. Strain

  • Contrasting patterns of biomass allocation in dominant and suppressed loblolly pine

    Shawna L. Naidu;Evan H. DeLucia;Richard B. Thomas

  • Elevated CO2 affects photosynthetic responses in canopy pine and subcanopy deciduous trees over 10 years: a synthesis from Duke FACE

    David S Ellsworth;Richard Thomas;Kristine Y Crous;Sari Palmroth

  • Effects of increased atmospheric CO2, temperature, and soil N availability on root exudation of dissolved organic carbon by a N-fixing tree (Robinia pseudoacacia L.)

    Shauna M. Uselman;Robert G. Qualls;Richard B. Thomas

  • Is atmospheric CO2 a selective agent on model C3 annuals

    J. K. Ward;J. Antonovics;R. B. Thomas;B. R. Strain

  • Effects of low and elevated CO2 on C3 and C4 annuals : II. Photosynthesis and leaf biochemistry.

    D T Tissue;K L Griffin;R B Thomas;B R Strain

  • Effects of CO2 enrichment on the photosynthetic light response of sun and shade leaves of canopy sweetgum trees (Liquidambar styraciflua) in a forest ecosystem

    Jeffrey D. Herrick;Richard B. Thomas

  • Global tree intrinsic water use efficiency is enhanced by increased atmospheric CO2 and modulated by climate and plant functional types.

    Justin M. Mathias;Richard B. Thomas

  • Loblolly pine grown under elevated CO2 affects early instar pine sawfly performance.

    R. S. Williams;D. E. Lincoln;R. B. Thomas

  • Metabolic regulation of leaf respiration and alternative pathway activity in response to phosphate supply: Metabolic regulation of respiration

    M. A. Gonzàlez-Meler;L. Giles;R. B. Thomas;J. N. Siedow

  • Growth and photosynthesis of loblolly pine (Pinus taeda) after exposure to elevated CO(2) for 19 months in the field.

    D. T. Tissue;R. B. Thomas;B. R. Strain

  • Effects of nitrogen supply and elevated carbon dioxide on construction cost in leaves of Pinus taeda (L.) seedlings

    Kevin L. Griffin;Richard B. Thomas;Boyd R. Strain

  • Leaf senescence and late-season net photosynthesis of sun and shade leaves of overstory sweetgum (Liquidambar styraciflua) grown in elevated and ambient carbon dioxide concentrations

    Jeffrey D. Herrick;Richard B. Thomas

  • Metabolic regulation of leaf respiration and alternative pathway activity in response to phosphate supply

    M. A. Gonzàlez-Meler;L. Giles;R. B. Thomas;J. N. Siedow

  • No photosynthetic down‐regulation in sweetgum trees (Liquidambar styraciflua L.) after three years of CO2 enrichment at the Duke Forest FACE experiment

    J. D. Herrick;R. B. Thomas

  • Direct and indirect effects of elevated CO2 on leaf respiration in a forest ecosystem

    J. G. Hamilton;R. B. Thomas;Evan H Delucia

  • Differential responses of root uptake kinetics of NH4+ and NO3− to enriched atmospheric CO2 concentration in field‐grown loblolly pine

    H. Bassirirad;R. B. Thomas;J. F. Reynolds;B. R. Strain

Frequent Co-Authors

Boyd R. Strain
Boyd R. Strain Duke University
Evan H. DeLucia
Evan H. DeLucia University of Illinois at Urbana-Champaign
David T. Tissue
David T. Tissue Western Sydney University
William H. Schlesinger
William H. Schlesinger Duke University
Kevin L. Griffin
Kevin L. Griffin Columbia University
Miquel A. Gonzalez-Meler
Miquel A. Gonzalez-Meler University of Illinois at Chicago
Adrien C. Finzi
Adrien C. Finzi Boston University
Peter S. Curtis
Peter S. Curtis The Ohio State University
Richard C. Sicher
Richard C. Sicher Agricultural Research Service
Ram Oren
Ram Oren Duke University

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