World's Best Scientists 2026 revealed!

D-Index & Metrics

Environmental Sciences

D-Index
48
Citations
6765
World Ranking
5630
National Ranking
432

John G. Farmer publication distribution in Environmental Sciences in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Environmental Sciences in 2026. The highlighted bar marks where John G. Farmer sits on this spectrum.

41–50 publications: 21 scientists 51–60 publications: 62 scientists 61–70 publications: 133 scientists 71–80 publications: 257 scientists 81–90 publications: 361 scientists 91–100 publications: 440 scientists 101–110 publications: 492 scientists 111–120 publications: 541 scientists 121–130 publications: 617 scientists 131–140 publications: 544 scientists 141–150 publications: 541 scientists 151–160 publications: 539 scientists 161–170 publications: 444 scientists 171–180 publications: 444 scientists 181–190 publications: 400 scientists 191–200 publications: 377 scientists 201–210 publications: 318 scientists 211–220 publications: 283 scientists 221–230 publications: 263 scientists 231–240 publications: 220 scientists 241–250 publications: 217 scientists 251–260 publications: 180 scientists 261–270 publications: 181 scientists 271–280 publications: 155 scientists 281–290 publications: 130 scientists 291–300 publications: 127 scientists 301–310 publications: 130 scientists 311–320 publications: 85 scientists 321–330 publications: 106 scientists 331–340 publications: 80 scientists 341–350 publications: 83 scientists 351–360 publications: 75 scientists 361–370 publications: 69 scientists 371–380 publications: 52 scientists 381–390 publications: 54 scientists 391–400 publications: 56 scientists 401–410 publications: 44 scientists 411–420 publications: 40 scientists 421–430 publications: 36 scientists 431–440 publications: 25 scientists 441–450 publications: 25 scientists 451–460 publications: 32 scientists 461–470 publications: 29 scientists 471–480 publications: 21 scientists 481–490 publications: 26 scientists 491–500 publications: 25 scientists 501–510 publications: 17 scientists 511–520 publications: 18 scientists 521–530 publications: 15 scientists 531–540 publications: 22 scientists 541–550 publications: 12 scientists 551–560 publications: 15 scientists 561–570 publications: 11 scientists 571–580 publications: 19 scientists 581–590 publications: 9 scientists 591–600 publications: 9 scientists 601–610 publications: 7 scientists 611–620 publications: 11 scientists 621–630 publications: 5 scientists 631–640 publications: 5 scientists 641–650 publications: 6 scientists 651–660 publications: 3 scientists 661–670 publications: 3 scientists 671–680 publications: 4 scientists 681–686 publications: 3 scientists 687+ publications: 100 scientists
41 publications 687+

This scientist: 135 publications — 33rd percentile

33% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 687 publications or more.

John G. Farmer D-index placement in Environmental Sciences in 2026

The chart shows the D-index (discipline H-index) distribution of Environmental Sciences scientists ranked by Research.com in 2026. The highlighted bar marks where John G. Farmer sits on this spectrum.

30 D-Index: 12 scientists 31 D-Index: 26 scientists 32 D-Index: 51 scientists 33 D-Index: 88 scientists 34 D-Index: 123 scientists 35 D-Index: 163 scientists 36 D-Index: 206 scientists 37 D-Index: 267 scientists 38 D-Index: 265 scientists 39 D-Index: 275 scientists 40 D-Index: 321 scientists 41 D-Index: 343 scientists 42 D-Index: 305 scientists 43 D-Index: 336 scientists 44 D-Index: 330 scientists 45 D-Index: 348 scientists 46 D-Index: 291 scientists 47 D-Index: 275 scientists 48 D-Index: 272 scientists 49 D-Index: 273 scientists 50 D-Index: 263 scientists 51 D-Index: 232 scientists 52 D-Index: 266 scientists 53 D-Index: 217 scientists 54 D-Index: 199 scientists 55 D-Index: 177 scientists 56 D-Index: 202 scientists 57 D-Index: 204 scientists 58 D-Index: 166 scientists 59 D-Index: 177 scientists 60 D-Index: 166 scientists 61 D-Index: 152 scientists 62 D-Index: 143 scientists 63 D-Index: 150 scientists 64 D-Index: 124 scientists 65 D-Index: 119 scientists 66 D-Index: 120 scientists 67 D-Index: 118 scientists 68 D-Index: 82 scientists 69 D-Index: 98 scientists 70 D-Index: 94 scientists 71 D-Index: 105 scientists 72 D-Index: 74 scientists 73 D-Index: 84 scientists 74 D-Index: 70 scientists 75 D-Index: 67 scientists 76 D-Index: 78 scientists 77 D-Index: 60 scientists 78 D-Index: 59 scientists 79 D-Index: 52 scientists 80 D-Index: 47 scientists 81 D-Index: 38 scientists 82 D-Index: 48 scientists 83 D-Index: 42 scientists 84 D-Index: 42 scientists 85 D-Index: 43 scientists 86 D-Index: 29 scientists 87 D-Index: 37 scientists 88 D-Index: 29 scientists 89 D-Index: 30 scientists 90 D-Index: 34 scientists 91 D-Index: 20 scientists 92 D-Index: 22 scientists 93 D-Index: 17 scientists 94 D-Index: 19 scientists 95 D-Index: 24 scientists 96 D-Index: 21 scientists 97 D-Index: 20 scientists 98 D-Index: 24 scientists 99 D-Index: 17 scientists 100 D-Index: 17 scientists 101 D-Index: 21 scientists 102 D-Index: 25 scientists 103 D-Index: 18 scientists 104 D-Index: 26 scientists 105 D-Index: 19 scientists 106 D-Index: 15 scientists 107 D-Index: 10 scientists 108 D-Index: 13 scientists 109 D-Index: 15 scientists 110 D-Index: 12 scientists 111 D-Index: 8 scientists 112 D-Index: 7 scientists 113 D-Index: 9 scientists 114 D-Index: 6 scientists 115 D-Index: 12 scientists 116 D-Index: 7 scientists 117 D-Index: 8 scientists 118 D-Index: 3 scientists 119 D-Index: 5 scientists 120 D-Index: 7 scientists 121 D-Index: 2 scientists 122 D-Index: 4 scientists 123 D-Index: 8 scientists 124 D-Index: 7 scientists 125+ D-Index: 99 scientists
30 D-Index 125+

This scientist: 48 D-Index — 44th percentile

44% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 125 D-Index or more.

Overview

John G. Farmer is affiliated with the University of Edinburgh in the United Kingdom. Their research primarily focuses on Environmental Science and Agricultural and Biological Sciences. The subfields of study that characterize their work include Pollution, Ecology, and Soil Science.

The scientist's research topics center on Wastewater Treatment and Nitrogen Removal, Microbial Community Ecology and Physiology, and Soil Carbon and Nitrogen Dynamics. These themes reflect an emphasis on the interactions between microbial communities and nutrient cycles in soil and water environments.

John G. Farmer has contributed to the academic literature with publications in recognized venues. Notably, they have a paper titled "Ammonium oxidizing bacteria and archaea vary with season under plastic film mulching and long-term fertilization", published in 2020 in the Archives of Agronomy and Soil Science. This paper has received citations demonstrating engagement within the scientific community.

Frequent collaborators in their work include Patrick A. Sawyerr and Jingkuan Wang. These coauthors have appeared alongside John G. Farmer in at least one publication each, indicating collaborative research efforts.

John G. Farmer's presence in publication venues is concentrated in the Archives of Agronomy and Soil Science, where they have published their documented research.

  • Ammonium oxidizing bacteria and archaea vary with season under plastic film mulching and long-term fertilization (2020, Archives of Agronomy and Soil Science)

  • Patrick A. Sawyerr
  • Jingkuan Wang

  • Archives of Agronomy and Soil Science

  • Environmental Science
  • Agricultural and Biological Sciences

  • Pollution
  • Ecology
  • Soil Science

  • Wastewater Treatment and Nitrogen Removal
  • Microbial Community Ecology and Physiology
  • Soil Carbon and Nitrogen Dynamics

Best Publications

  • Stable Lead Isotope Record of Lead Pollution in Loch Lomond Sediments since 1630 A.D.

    John G. Farmer;Lorna J. Eades;Angus B. Mackenzie;Alex Kirika

  • Multi-step sequential chemical extraction of heavy metals from urban soils

    M.J. Gibson;J.G. Farmer

  • Assessment of occupational exposure to inorganic arsenic based on urinary concentrations and speciation of arsenic.

    J G Farmer;L R Johnson

  • Identification and geochemical modeling of processes controlling leaching of Cr(VI) and other major elements from chromite ore processing residue

    Jeanine S Geelhoed;Johannes C.L Meeussen;Stephen Hillier;David G Lumsdon

  • Over one hundred years of trace metal fluxes in the sediments of the Pearl River Estuary, South China.

    C.C.M. Ip;X.D. Li;G. Zhang;J.G. Farmer

  • A Study of Carbon and Nitrogen Stable Isotope and Elemental Ratios as Potential Indicators of Source and Fate of Organic Matter in Sediments of the Forth Estuary, Scotland

    M.C. Graham;M.A. Eaves;J.G. Farmer;J. Dobson

  • The lead content and isotopic composition of british coals and their implications for past and present releases of lead to the UK environment

    John G. Farmer;Lorna J. Eades;Margaret C. Graham

  • Determination of the bioaccessibility of chromium in Glasgow soil and the implications for human health risk assessment

    Andrew Broadway;Mark R. Cave;Joanna Wragg;Fiona M. Fordyce

  • Chromium remediation or release? Effect of iron(II) sulfate addition on chromium(VI) leaching from columns of chromite ore processing residue.

    Jeanine S. Geelhoed;Johannes C. L. Meeussen;Martin J. Roe;Stephen Hillier

  • Isotopic evidence of the relative retention and mobility of lead and radiocaesium in Scottish ombrotrophic peats

    A.B. MacKenzie;J.G. Farmer;C.L. Sugden

  • Role of quantitative mineralogical analysis in the investigation of sites contaminated by chromite ore processing residue.

    S. Hillier;M.J. Roe;J.S. Geelhoed;A.R. Fraser

  • A Comparison of the Historical Lead Pollution Records in Peat and Freshwater Lake Sediments from Central Scotland

    J.G. Farmer;A.B. Mackenzie;C.L. Sugden;P.J. Edgar

  • Calcium polysulfide remediation of hexavalent chromium contamination from chromite ore processing residue.

    Margaret C. Graham;John G. Farmer;Peter Anderson;Edward Paterson

  • Stable lead isotopic characterisation of the historical record of environmental lead contamination in dated freshwater lake sediment cores from northern and central Scotland

    L.J. Eades;J.G. Farmer;A.B. MacKenzie;A. Kirika

  • Isotopic ratios of lead in contemporary environmental material from Scotland

    C L Sugden;J G Farmer;A B Mackenzie

  • A comparative study of acid-extractable and total digestion methods for the determination of inorganic elements in peat material by inductively coupled plasma-optical emission spectrometry

    Charun Yafa;John G. Farmer

  • Geochemical associations and availability of cadmium (Cd) in a paddy field system, northwestern Thailand

    Peerapat Kosolsaksakul;John G. Farmer;Ian W. Oliver;Margaret C. Graham

  • Historical trends in the lead isotopic composition of archival Sphagnum mosses from Scotland (1838-2000).

    John G. Farmer;Lorna J. Eades;Hannah Atkins;David F. Chamberlain

  • A lead isotopic study of the human bioaccessibility of lead in urban soils from Glasgow, Scotland

    John G. Farmer;Andrew Broadway;Mark R. Cave;Joanna Wragg

  • Natural enrichment of arsenic in Loch Lomond sediments

    J.G. Farmer;M.A. Lovell

Frequent Co-Authors

Angus B. MacKenzie
Angus B. MacKenzie Scottish Universities Environmental Research Centre
Mark Cave
Mark Cave British Geological Survey
Rob M. Ellam
Rob M. Ellam Tianjin University
Anthony E. Fallick
Anthony E. Fallick University of Glasgow
Sarah M. Dunn
Sarah M. Dunn James Hutton Institute
Eric Paterson
Eric Paterson James Hutton Institute
Stephen A. Norton
Stephen A. Norton University of Maine
Sarah E. Metcalfe
Sarah E. Metcalfe University of Nottingham
William Shotyk
William Shotyk University of Alberta
Simon J. T. Pollard
Simon J. T. Pollard Cranfield University

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