World's Best Scientists 2026 revealed!
Clarence J. Swanton

Clarence J. Swanton

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Plant Science and Agronomy
Canada
2023

D-Index & Metrics

Plant Science and Agronomy

D-Index
72
Citations
18537
World Ranking
631
National Ranking
18

Clarence J. Swanton 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 Clarence J. Swanton 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: 284 publications — 91st percentile

91% of scientists in this discipline score the same or lower.

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

Clarence J. Swanton 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 Clarence J. Swanton 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: 72 D-Index — 91st percentile

91% of scientists in this discipline score the same or lower.

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

Research.com Recognitions

  • 2023 - Research.com Plant Science and Agronomy in Canada Leader Award
  • 2022 - Research.com Plant Science and Agronomy in Canada Leader Award

Overview

What is he best known for?

The fields of study he is best known for:

  • Ecology
  • Botany
  • Agronomy

Clarence J. Swanton mainly investigates Weed, Agronomy, Weed control, Tillage and Crop. His work carried out in the field of Weed brings together such families of science as Phenology and Horticulture, Seedling. His Agronomy research is multidisciplinary, relying on both Loam and Competition.

His Weed control study incorporates themes from Agricultural engineering, Zea mays and Cropping system. The concepts of his Tillage study are interwoven with issues in Cover crop, Agroforestry, Soil water and Plough. His research integrates issues of Population density and Crop rotation in his study of Crop yield.

His most cited work include:

  • Integrated Weed Management: The Rationale and Approach (418 citations)
  • The Critical Period of Weed Control in Grain Corn (Zea mays) (378 citations)
  • Understanding maize–weed competition: resource competition, light quality and the whole plant (292 citations)

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

His main research concerns Agronomy, Weed, Weed control, Tillage and Crop. His Agronomy study typically links adjacent topics like Horticulture. He has included themes like Dry matter and Botany in his Horticulture study.

His Weed research is multidisciplinary, relying on both Plant ecology, Shade avoidance, Competition and Phenology. His Weed control study combines topics from a wide range of disciplines, such as Glufosinate, Zea mays and Agriculture. His Tillage research focuses on subjects like Plough, which are linked to Water content.

He most often published in these fields:

  • Agronomy (65.52%)
  • Weed (45.21%)
  • Weed control (36.02%)

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

  • Agronomy (65.52%)
  • Weed control (36.02%)
  • Weed (45.21%)

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

His scientific interests lie mostly in Agronomy, Weed control, Weed, Competition and Glyphosate. His work on Mesotrione, Yield and Seedling is typically connected to Far-red and Thiamethoxam as part of general Agronomy study, connecting several disciplines of science. The study incorporates disciplines such as Biomass, Agriculture, Horticulture and Environmental planning in addition to Weed control.

His biological study spans a wide range of topics, including Agroforestry, Low nitrogen, Shade avoidance, Sowing and Tillage. The various areas that Clarence J. Swanton examines in his Competition study include Intraspecific competition and Botany. His study in Glyphosate is interdisciplinary in nature, drawing from both Dicamba and Dimethenamid.

Between 2011 and 2021, his most popular works were:

  • Weed Management in 2050: Perspectives on the Future of Weed Science (74 citations)
  • Experimental Methods for Crop–Weed Competition Studies (69 citations)
  • When too much isn’t enough: Does current food production meet global nutritional needs? (47 citations)

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

  • Ecology
  • Botany
  • Agriculture

Clarence J. Swanton mostly deals with Weed, Weed control, Competition, Agronomy and Botany. Clarence J. Swanton studies Weed, focusing on Anagallis arvensis in particular. His study in the field of Crop weed also crosses realms of Competition, Liberian dollar and Experimental methods.

As part of the same scientific family, he usually focuses on Competition, concentrating on Intraspecific competition and intersecting with Phaseolus, Interspecific competition, Cultivar and Phenotypic plasticity. Much of his study explores Agronomy relationship to Low nitrogen. His work on Lignin and Environmental factor as part of general Botany research is often related to Phytochrome, Far-red and Phenylpropanoid, thus linking different fields of science.

Best Publications

  • Integrated Weed Management: The Rationale and Approach

    Clarence J. Swanton;Stephan F. Weise

  • The critical period of weed control in grain corn (Zea mays).

    Michael R. Hall;Clarence J. Swanton;Glenn W. Anderson

  • Understanding maize–weed competition: resource competition, light quality and the whole plant

    Irena Rajcan;Clarence J Swanton

  • Cycling of extracellular DNA in the soil environment

    David J. Levy-Booth;Rachel G. Campbell;Robert H. Gulden;Miranda M. Hart

  • TILLAGE EFFECTS ON WEED SEED RETURN AND SEEDBANK COMPOSITION

    David R. Clements;Diane L. Benoit;Stephen D. Murphy;Clarence J. Swanton

  • Impact of Agronomic Practices on Weed Communities: Tillage Systems

    Douglas A. Derksen;Guy P. Lafond;A. Gordon Thomas;Heather A. Loeppky

  • The critical period of weed control in soyabean (Glycine max (L.) Merr.).

    R. E. van Acker;C. J. Swanton;S. F. Weise

  • Weed Ecology in Natural and Agricultural Systems

    Barbara D. Booth;Stephen D. D. Murphy;Clarence J. J. Swanton

  • Weed management in 2050: perspectives on the future of weed science.

    James H. Westwood;Raghavan Charudattan;Stephen O. Duke;Steven A. Fennimore

  • Estimation of solar radiation for use in crop modelling

    L.A. Hunt;L. Kuchar;C.J. Swanton

  • Interference of redroot pigweed (Amaranthus retroflexus) in corn (Zea mays)

    Stevan Z. Knezevic;Stephan F. Weise;Clarence J. Swanton

  • Assembly theory applied to weed communities.

    Barbara D. Booth;Clarence J. Swanton

  • Weed Science Beyond the Weeds: The Role of Integrated Weed Management (IWM) in Agroecosystem Health'

    Clarence J. Swanton;Stephen D. Murphy

  • Influence of barnyardgrass (Echinochloa crus-galli) time of emergence and density on corn (Zea mays).

    Aca C. Bosnic;Clarence J. Swanton

  • Effect of Crop Density on Weed Interference in Maize

    M. Tollenaar;A. A. Dibo;A. Aguilara;S. F. Weise

  • Promotion of weed species diversity and reduction of weed seedbanks with conservation tillage and crop rotation

    Stephen D. Murphy;David R. Clements;Svenja Belaoussoff;Peter G. Kevan

  • Effect of planting patterns and inter-row cultivation on competition between corn (Zea mays) and late emerging weeds

    Stephen D. Murphy;Yussif Yakubu;Stephan F. Weise;Clarence J. Swanton

  • Effect of tillage, cover crop and crop rotation on the composition of weed flora in a sandy soil

    A Shrestha;S Z Knezevic;R C Roy;B R Ball-Coelho

  • Experimental Methods for Crop–Weed Competition Studies

    Clarence J. Swanton;Roger Nkoa;Robert E. Blackshaw

  • INFLUENCE OF TILLAGE AND CROP RESIDUE ON POSTDISPERSAL PREDATION OF WEED SEEDS

    Heather E. Cromar;Stephen D. Murphy;Clarence J. Swanton

Frequent Co-Authors

Peter H. Sikkema
Peter H. Sikkema University of Guelph
Robert H. Gulden
Robert H. Gulden University of Manitoba
Anil Shrestha
Anil Shrestha California State University, Fresno
Matthijs Tollenaar
Matthijs Tollenaar University of Guelph
Jeff R. Powell
Jeff R. Powell Western Sydney University
Jack T. Trevors
Jack T. Trevors University of Guelph
John N. Klironomos
John N. Klironomos American University of Sharjah
K. Peter Pauls
K. Peter Pauls University of Guelph
Kari E. Dunfield
Kari E. Dunfield University of Guelph
Miranda M. Hart
Miranda M. Hart University of British Columbia

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