World's Best Scientists 2026 revealed!

D-Index & Metrics

Plant Science and Agronomy

D-Index
70
Citations
19701
World Ranking
703
National Ranking
205

William R. Horwath 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 William R. Horwath 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: 314 publications — 94th percentile

94% of scientists in this discipline score the same or lower.

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

William R. Horwath 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 William R. Horwath 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: 70 D-Index — 89th percentile

89% 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

  • 2009 - Fellow of the Soil Science Society of America (SSSA)

Overview

What is he best known for?

The fields of study he is best known for:

  • Ecology
  • Agriculture
  • Ecosystem

William R. Horwath mostly deals with Agronomy, Environmental chemistry, Soil organic matter, Mineralization and Soil water. His Agronomy study incorporates themes from Nutrient, Organic farming and Cycling. He has included themes like Nitrogen, Incubation, Ferric, Water quality and Nitrate in his Environmental chemistry study.

He interconnects Soil management, Crop rotation, Trifolium repens, No-till farming and Lolium perenne in the investigation of issues within Soil organic matter. His Mineralization research is multidisciplinary, incorporating elements of Food science, Tannin and Tannic acid. His work deals with themes such as Temperate forest and Total organic carbon, which intersect with Soil water.

His most cited work include:

  • Acid fumigation of soils to remove carbonates prior to total organic carbon or CARBON‐13 isotopic analysis (733 citations)
  • Spectrophotometric Determination of Nitrate with a Single Reagent (580 citations)
  • Ammonia oxidation pathways and nitrifier denitrification are significant sources of N2O and NO under low oxygen availability (391 citations)

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

The scientist’s investigation covers issues in Agronomy, Soil water, Soil organic matter, Environmental chemistry and Soil carbon. Agronomy is often connected to Nutrient in his work. His Soil water research includes themes of Hydrology and Organic matter.

William R. Horwath has researched Soil organic matter in several fields, including Total organic carbon, Soil quality, Soil fertility, Cycling and Nutrient cycle. His study looks at the relationship between Environmental chemistry and fields such as Sulfate, as well as how they intersect with chemical problems. His research integrates issues of Soil chemistry, Ecosystem and Mollisol in his study of Soil carbon.

He most often published in these fields:

  • Agronomy (45.06%)
  • Soil water (33.60%)
  • Soil organic matter (18.97%)

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

  • Soil water (33.60%)
  • Environmental chemistry (17.00%)
  • Agronomy (45.06%)

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

His scientific interests lie mostly in Soil water, Environmental chemistry, Agronomy, Soil carbon and Climate change. His study in Soil water focuses on Mineralization in particular. His Environmental chemistry study combines topics from a wide range of disciplines, such as Soil organic matter, Soil pH, Sulfate and Nutrient.

The various areas that William R. Horwath examines in his Soil organic matter study include Primary production, Total organic carbon, Tillage and Biogeochemical cycle. The study incorporates disciplines such as Agriculture, Crop residue and Nitrogen in addition to Agronomy. His Soil carbon research incorporates themes from Soil type, Mollisol, Incubation, Soil series and Soil texture.

Between 2017 and 2021, his most popular works were:

  • Soil microbial biomass size and soil carbon influence the priming effect from carbon inputs depending on nitrogen availability (46 citations)
  • Review and synthesis of the effects of elevated atmospheric CO2 on soil processes: No changes in pools, but increased fluxes and accelerated cycles (42 citations)
  • Sources of Variability that Compromise Mineralizable Carbon as a Soil Health Indicator (25 citations)

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

  • Ecology
  • Agriculture
  • Ecosystem

William R. Horwath mostly deals with Soil water, Environmental chemistry, Ecosystem, Soil carbon and Climate change. His studies in Soil water integrate themes in fields like Nitrification and Cycling. His study in Environmental chemistry is interdisciplinary in nature, drawing from both Water quality, Nutrient, Ammonia and Wetland.

His research in Ecosystem intersects with topics in Inceptisol, Ultisol, Entisol and Hydrology. His Soil carbon research is multidisciplinary, relying on both Residue, Plant residue, Agronomy and Incubation. In the subject of general Agronomy, his work in Tillage is often linked to Energy source, thereby combining diverse domains of study.

Best Publications

  • Acid fumigation of soils to remove carbonates prior to total organic carbon or CARBON-13 isotopic analysis

    David Harris;William R. Horwáth;Chris van Kessel

  • Ammonia oxidation pathways and nitrifier denitrification are significant sources of N2O and NO under low oxygen availability

    Xia Zhu;Martin Burger;Timothy A Doane;William R Horwath

  • Pathways of nitrogen utilization by soil microorganisms - a review.

    Daniel Geisseler;Daniel Geisseler;William R. Horwath;Rainer Georg Joergensen;Bernard Ludwig

  • Changes in Soil Chemical Properties Resulting from Organic and Low-Input Farming Practices

    M. Sean Clark;William R. Horwath;Carol Shennan;Kate M. Scow

  • On-Farm Assessment of Soil Quality in California's Central Valley

    Susan S. Andrews;Jeffrey P. Mitchell;Roberto Mancinelli;Douglas L. Karlen

  • Decomposition of rice straw and microbial carbon use efficiency under different soil temperatures and moistures

    Olivier C Devêvre;William R Horwáth

  • Agroecology: A Review from a Global-Change Perspective

    Thomas P. Tomich;Sonja Brodt;Howard Ferris;Ryan Galt

  • Climate-smart agriculture global research agenda: scientific basis for action

    Kerri L Steenwerth;Amanda K Hodson;Arnold J Bloom;Michael R Carter

  • Soil compaction effects on growth of young ponderosa pine following litter removal in California's Sierra Nevada

    A. Gomez;R. F. Powers;M. J. Singer;W. R. Horwath

  • Comparison of soil N availability and leaching potential, crop yields and weeds in organic, low-input and conventional farming systems in northern California

    D.D. Poudel;W.R. Horwath;W.T. Lanini;S.R. Temple

  • Rice yield and nitrogen utilization efficiency under alternative straw management practices.

    Alison J. Eagle;Jeffrey A. Bird;William R. Horwath;Bruce A. Linquist

  • Comparison of Permanganate-Oxidizable Carbon and Mineralizable Carbon for Assessment of Organic Matter Stabilization and Mineralization

    Tunsisa T. Hurisso;Steve W. Culman;William R. Horwath;Jordon Wade

  • Nitrogen, weeds and water as yield-limiting factors in conventional, low-input, and organic tomato systems.

    M.Sean Clark;William R. Horwath;Carol Shennan;Kate M. Scow

  • Cover cropping affects soil N2O and CO2 emissions differently depending on type of irrigation

    Cynthia M. Kallenbach;Dennis E. Rolston;William R. Horwath

  • Review and synthesis of the effects of elevated atmospheric CO2 on soil processes: No changes in pools, but increased fluxes and accelerated cycles

    Yakov Kuzyakov;Yakov Kuzyakov;William R. Horwath;Maxim Dorodnikov;Evgenia Blagodatskaya

  • Cover cropping and no-tillage improve soil health in an arid irrigated cropping system in California’s San Joaquin Valley, USA

    Jeffrey P. Mitchell;Anil Shrestha;Konrad Mathesius;Kate M. Scow

  • Mineral control of organic carbon mineralization in a range of temperate conifer forest soils

    Craig Rasmussen;Randal J. Southard;William R. Horwath

  • 14C Allocation in tree-soil systems.

    William R. Horwath;Kurt S. Pregitzer;Eldor A. Paul

  • Regulation of extracellular protease activity in soil in response to different sources and concentrations of nitrogen and carbon.

    Daniel Geisseler;William R. Horwath

  • Higher yields and lower methane emissions with new rice cultivars.

    Yu Jiang;Kees Jan van Groenigen;Kees Jan van Groenigen;Shan Huang;Bruce A. Hungate

  • Carbon and nitrogen dynamics in a forest soil amended with purified tannins from different plant species

    Tamara E.C. Kraus;Robert J. Zasoski;Randy A. Dahlgren;William R. Horwath

Frequent Co-Authors

Lucas C. R. Silva
Lucas C. R. Silva University of Oregon
Jeffrey P. Mitchell
Jeffrey P. Mitchell University of California, Davis
Chris van Kessel
Chris van Kessel University of California, Davis
Johan Six
Johan Six ETH Zurich
Kate M. Scow
Kate M. Scow University of California, Davis
Wesley W. Wallender
Wesley W. Wallender University of California, Davis
Craig Rasmussen
Craig Rasmussen University of Arizona
Louise E. Jackson
Louise E. Jackson University of California, Davis
Bruce A. Linquist
Bruce A. Linquist University of California, Davis
Randy A. Dahlgren
Randy A. Dahlgren University of California, Davis

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