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Plant Science and Agronomy
South Africa
2025

D-Index & Metrics

Plant Science and Agronomy

D-Index
60
Citations
11791
World Ranking
1229
National Ranking
13

Ecology and Evolution

D-Index
62
Citations
12493
World Ranking
2093
National Ranking
27

Ed T.F. Witkowski 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 Ed T.F. Witkowski 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: 250 publications — 87th percentile

87% of scientists in this discipline score the same or lower.

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

Ed T.F. Witkowski 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 Ed T.F. Witkowski 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: 60 D-Index — 82nd percentile

82% 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

  • 2025 - Research.com Plant Science and Agronomy in South Africa Leader Award

Overview

What is he best known for?

The fields of study he is best known for:

  • Ecology
  • Botany
  • Agriculture

Ed T.F. Witkowski spends much of his time researching Botany, Ecology, Woodland, Agroforestry and Shrub. His study in Botany is interdisciplinary in nature, drawing from both Nutrient, Agronomy and Horticulture. His Ecology research focuses on Microsite and how it relates to Hakea and Germination.

His work deals with themes such as Forest management, Natural resource and Sustainable management, which intersect with Woodland. His Agroforestry research integrates issues from Coppicing, Firewood, Grassland, Sustainability and Fire regime. The various areas that he examines in his Shrub study include Sclerophyll and Acacia saligna.

His most cited work include:

  • Leaf specific mass confounds leaf density and thickness (537 citations)
  • Population fragmentation may reduce fertility to zero in Banksia goodii — a demonstration of the Allee effect (353 citations)
  • Post-fire litter microsites: Safe for seeds, unsafe for seedlings (198 citations)

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

The scientist’s investigation covers issues in Ecology, Botany, Agroforestry, Agronomy and Woodland. His study in Ecology concentrates on Vegetation, Habitat, Biodiversity, Species richness and Herbivore. His Botany study incorporates themes from Nutrient and Horticulture.

His Agroforestry study combines topics in areas such as Agriculture, Livelihood, Environmental protection, Land use and Sustainability. Ed T.F. Witkowski interconnects Plant ecology, Woody plant and Biological pest control in the investigation of issues within Agronomy. His research integrates issues of Proteaceae and Fire ecology in his study of Shrub.

He most often published in these fields:

  • Ecology (46.46%)
  • Botany (25.98%)
  • Agroforestry (17.32%)

What were the highlights of his more recent work (between 2017-2021)?

  • Ecology (46.46%)
  • Biological pest control (6.30%)
  • Agronomy (16.54%)

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

His primary areas of investigation include Ecology, Biological pest control, Agronomy, Weed and Herbivore. His work is dedicated to discovering how Ecology, Spatial distribution are connected with Spatial ecology and Woodland and other disciplines. His studies deal with areas such as Animal ecology, Plant growth and Lantana camara as well as Biological pest control.

His Agronomy study frequently draws connections to adjacent fields such as Vegetation. His Weed study combines topics from a wide range of disciplines, such as Biodiversity and Horticulture. His Herbivore research is multidisciplinary, incorporating perspectives in Shrub and Insect.

Between 2017 and 2021, his most popular works were:

  • Does host plant quality constrain the performance of the Parthenium beetle Zygogramma bicolorata (11 citations)
  • Wild Foods: Safety Net or Poverty Trap? A South African Case Study (11 citations)
  • A review of Solanum mauritianum biocontrol: prospects, promise and problems: a way forward for South Africa and globally (11 citations)

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

  • Ecology
  • Botany
  • Agriculture

His main research concerns Biological pest control, Ecology, Parthenium hysterophorus, Parthenium and Agronomy. Ed T.F. Witkowski works mostly in the field of Biological pest control, limiting it down to topics relating to Animal ecology and, in certain cases, Asteraceae, Greenhouse and Gall. His study brings together the fields of Sclerocarya birrea and Ecology.

His studies in Agronomy integrate themes in fields like Hakea, Woody plant, Fire ecology and Banksia. His Zygogramma bicolorata research is multidisciplinary, incorporating elements of Fecundity, Toxicology, Invasive species, Plant ecology and Insect. His Herbivore study is focused on Botany in general.

Best Publications

  • Leaf specific mass confounds leaf density and thickness

    E. T. F. Witkowski;Byron B. Lamont

  • Population fragmentation may reduce fertility to zero in Banksia goodii — a demonstration of the Allee effect

    Byron B. Lamont;Peter G. L. Klinkhamer;E. T. F. Witkowski

  • Regeneration by coppicing (resprouting) of miombo (African savanna) trees in relation to land use

    Emmanuel J Luoga;E.T.F Witkowski;Kevin Balkwill

  • Post-fire litter microsites: Safe for seeds, unsafe for seedlings

    Byron B. Lamont;E. T. F. Witkowski;N. J. Enright

  • Unraveling the commercial market for medicinal plants and plant parts on the witwatersrand, South Africa

    Vivienne L. Williams;Kevin Balkwill;Edward T. F. Witkowski

  • Effects of invasive alien acacias on nutrient cycling in the coastal lowlands of the cape fynbos

    E. T. F. Witkowski

  • Differential utilization and Ethnobotany of trees in Kitulanghalo forest reserve and surrounding communal lands, eastern Tanzania

    Emmanuel J. Luoga;E. T. F. Witkowski;Kevin Balkwill

  • Review of commonly used remote sensing and ground-based technologies to measure plant water stress

    M. Govender;M. Govender;P.J. Dye;I.M. Weiersbye;E.T.F. Witkowski

  • Harvested and standing wood stocks in protected and communal miombo woodlands of eastern Tanzania

    Emmanuel J Luoga;E.T.F Witkowski;Kevin Balkwill

  • Water requirements for germination and early seedling establishment in four African savanna woody plant species

    T.B. Wilson;E.T.F. Witkowski

  • Economics of charcoal production in miombo woodlands of eastern Tanzania: some hidden costs associated with commercialization of the resources

    E.J Luoga;E.T.F Witkowski;K Balkwill

  • Valuation of communal area livestock benefits, rural livelihoods and related policy issues

    Delali B.K. Dovie;Charlie M. Shackleton;E.T.F. Witkowski

  • Reviewing Biosphere Reserves globally: effective conservation action or bureaucratic label?

    Kaera L. Coetzer;Edward T. F. Witkowski;Barend F. N. Erasmus

  • Changes in density, biomass, seed production and soil seed banks of the non-native invasive plant, Chromolaena odorata, along a 15 year chronosequence

    E. T. F. Witkowski;M. Wilson

  • Variations in soil phosphorus in the fynbos biome, South Africa.

    E. T. F. Witkowski;D. T. Mitchell

  • The impact of commercial harvesting on Warburgia salutaris (‘pepper-bark tree’) in Mpumalanga, South Africa

    J. Botha;E.T.F. Witkowski;C.M. Shackleton

  • Market profiles and trade in medicinal plants in the Lowveld, South Africa

    J Botha;E T F Witkowski;Charlie Shackleton

  • Direct-use values of woodland resources consumed and traded in a South African village

    Delali B.K. Dovie;Charlie M. Shackleton;Ed T.F. Witkowski

  • Land‐use and cover changes (1988–2002) around budongo forest reserve, NW Uganda: implications for forest and woodland sustainability

    E. N. Mwavu;E. T. F. Witkowski

  • A decision-making framework for restoring riparian zones degraded by invasive alien plants in South Africa

    P. M. Holmes;David M. Richardson;K. J. Esler;E. T. F. Witkowski

  • Taxonomic, Edaphic and Biological Aspects of Narrow Plant Endemism on Matched Sites in Mediterranean South Africa and Australia

    R. M. Cowling;E. T. F. Witkowski;A. V. Milewski;K. R. Newbrey

Frequent Co-Authors

Byron B. Lamont
Byron B. Lamont Curtin University
Charlie M. Shackleton
Charlie M. Shackleton Rhodes University
Konrad J Wessels
Konrad J Wessels George Mason University
Renaud Mathieu
Renaud Mathieu International Rice Research Institute
Sally Archibald
Sally Archibald University of the Witwatersrand
Gregory P. Asner
Gregory P. Asner Arizona State University
Neal J. Enright
Neal J. Enright Murdoch University
Karen J. Esler
Karen J. Esler Stellenbosch University
Timothy G. O’Connor
Timothy G. O’Connor University of the Witwatersrand
David A. Baum
David A. Baum University of Wisconsin–Madison

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