World's Best Scientists 2026 revealed!

D-Index & Metrics

Animal Science and Veterinary

D-Index
33
Citations
4646
World Ranking
1968
National Ranking
568

D.K. Combs publication distribution in Animal Science and Veterinary in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Animal Science and Veterinary in 2026. The highlighted bar marks where D.K. Combs sits on this spectrum.

29–33 publications: 1 scientists 34–38 publications: 6 scientists 39–43 publications: 17 scientists 44–48 publications: 23 scientists 49–53 publications: 28 scientists 54–58 publications: 44 scientists 59–63 publications: 66 scientists 64–68 publications: 75 scientists 69–73 publications: 71 scientists 74–78 publications: 85 scientists 79–83 publications: 108 scientists 84–88 publications: 105 scientists 89–93 publications: 84 scientists 94–98 publications: 103 scientists 99–103 publications: 97 scientists 104–108 publications: 95 scientists 109–113 publications: 89 scientists 114–118 publications: 88 scientists 119–123 publications: 109 scientists 124–128 publications: 93 scientists 129–133 publications: 89 scientists 134–138 publications: 95 scientists 139–143 publications: 92 scientists 144–148 publications: 80 scientists 149–153 publications: 75 scientists 154–158 publications: 74 scientists 159–163 publications: 67 scientists 164–168 publications: 53 scientists 169–173 publications: 62 scientists 174–178 publications: 63 scientists 179–183 publications: 50 scientists 184–188 publications: 55 scientists 189–193 publications: 50 scientists 194–198 publications: 27 scientists 199–203 publications: 44 scientists 204–208 publications: 31 scientists 209–213 publications: 28 scientists 214–218 publications: 38 scientists 219–223 publications: 33 scientists 224–228 publications: 36 scientists 229–233 publications: 29 scientists 234–238 publications: 35 scientists 239–243 publications: 23 scientists 244–248 publications: 24 scientists 249–253 publications: 29 scientists 254–258 publications: 28 scientists 259–263 publications: 21 scientists 264–268 publications: 25 scientists 269–273 publications: 11 scientists 274–278 publications: 18 scientists 279–283 publications: 13 scientists 284–288 publications: 18 scientists 289–293 publications: 10 scientists 294–298 publications: 12 scientists 299–303 publications: 11 scientists 304–308 publications: 15 scientists 309–313 publications: 14 scientists 314–318 publications: 14 scientists 319–323 publications: 8 scientists 324–328 publications: 8 scientists 329–333 publications: 13 scientists 334–338 publications: 14 scientists 339–343 publications: 13 scientists 344–348 publications: 10 scientists 349–353 publications: 11 scientists 354–358 publications: 5 scientists 359–363 publications: 8 scientists 364–368 publications: 8 scientists 369–373 publications: 6 scientists 374–378 publications: 7 scientists 379–383 publications: 8 scientists 384–388 publications: 3 scientists 389–393 publications: 4 scientists 394–398 publications: 5 scientists 399–403 publications: 8 scientists 404–408 publications: 5 scientists 409–413 publications: 4 scientists 414–418 publications: 3 scientists 419–423 publications: 8 scientists 424–428 publications: 5 scientists 429–433 publications: 3 scientists 434–438 publications: 5 scientists 439–441 publications: 5 scientists 442+ publications: 99 scientists
29 publications 442+

This scientist: 76 publications — 12th percentile

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

The last bar groups every scientist with 442 publications or more.

D.K. Combs D-index placement in Animal Science and Veterinary in 2026

The chart shows the D-index (discipline H-index) distribution of Animal Science and Veterinary scientists ranked by Research.com in 2026. The highlighted bar marks where D.K. Combs sits on this spectrum.

20 D-Index: 5 scientists 21 D-Index: 22 scientists 22 D-Index: 31 scientists 23 D-Index: 44 scientists 24 D-Index: 53 scientists 25 D-Index: 66 scientists 26 D-Index: 80 scientists 27 D-Index: 101 scientists 28 D-Index: 106 scientists 29 D-Index: 116 scientists 30 D-Index: 154 scientists 31 D-Index: 158 scientists 32 D-Index: 143 scientists 33 D-Index: 137 scientists 34 D-Index: 126 scientists 35 D-Index: 134 scientists 36 D-Index: 112 scientists 37 D-Index: 115 scientists 38 D-Index: 105 scientists 39 D-Index: 111 scientists 40 D-Index: 107 scientists 41 D-Index: 87 scientists 42 D-Index: 74 scientists 43 D-Index: 62 scientists 44 D-Index: 61 scientists 45 D-Index: 41 scientists 46 D-Index: 51 scientists 47 D-Index: 43 scientists 48 D-Index: 28 scientists 49 D-Index: 47 scientists 50 D-Index: 40 scientists 51 D-Index: 34 scientists 52 D-Index: 33 scientists 53 D-Index: 43 scientists 54 D-Index: 16 scientists 55 D-Index: 32 scientists 56 D-Index: 21 scientists 57 D-Index: 18 scientists 58 D-Index: 28 scientists 59 D-Index: 33 scientists 60 D-Index: 17 scientists 61 D-Index: 21 scientists 62 D-Index: 18 scientists 63 D-Index: 21 scientists 64 D-Index: 9 scientists 65 D-Index: 20 scientists 66 D-Index: 11 scientists 67 D-Index: 16 scientists 68 D-Index: 12 scientists 69 D-Index: 17 scientists 70 D-Index: 13 scientists 71 D-Index: 15 scientists 72 D-Index: 11 scientists 73 D-Index: 11 scientists 74 D-Index: 14 scientists 75 D-Index: 5 scientists 76 D-Index: 6 scientists 77+ D-Index: 100 scientists
20 D-Index 77+

This scientist: 33 D-Index — 39th percentile

39% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 77 D-Index or more.

Overview

D.K. Combs is affiliated with the University of Wisconsin-Madison in the United States and has contributed extensively to the fields of Agricultural and Biological Sciences as well as Biochemistry, Genetics and Molecular Biology. Their research spans multiple subfields, particularly Plant Science, Agronomy and Crop Science, Genetics, Cell Biology, and Animal Science and Zoology.

The scientist's main topics of work include:

  • Ruminant Nutrition and Digestive Physiology
  • Wheat and Barley Genetics and Pathology
  • Bioenergy Crop Production and Management
  • Plant Pathogens and Fungal Diseases
  • Plant Disease Management Techniques
  • Effects of Environmental Stressors on Livestock
  • Genetics and Plant Breeding

D.K. Combs has frequently published in several scientific venues, involving peer-reviewed journals such as Journal of Dairy Science, Frontiers in Plant Science, Theoretical and Applied Genetics, Heliyon, and Grass and Forage Science.

Notable papers authored or coauthored by this scientist include the following:

  • Randomized clinical trial to assess the effect of antibiotic therapy on health and growth of preweaned dairy calves diagnosed with respiratory disease using respiratory scoring and lung ultrasound, 2020, Journal of Dairy Science
  • Genome-Wide Association Studies Identifying Multiple Loci Associated With Alfalfa Forage Quality, 2021, Frontiers in Plant Science
  • Identification of genetic loci associated with five agronomic traits in alfalfa using multi-environment trials, 2023, Theoretical and Applied Genetics
  • Comparison of two in situ reference methods to estimate indigestible NDF by near infrared reflectance spectroscopy in alfalfa, 2021, Heliyon
  • Intensive mechanical processing of forage crops to improve fibre digestion, 2022, Grass and Forage Science

Collaboration plays an important role in D.K. Combs's research, having frequently coauthored works with several researchers including Sen Lin, Cesar Augusto Medina, Glenn E. Shewmaker, Steve Fransen, and Don Llewellyn.

Best Publications

  • High Feed Intake Increases Liver Blood Flow and Metabolism of Progesterone and Estradiol-17β in Dairy Cattle

    S. Sangsritavong;D.K. Combs;R. Sartori;L.E. Armentano

  • In Situ Dry Matter, Protein, and Fiber Degradation of Perennial Forages

    P.C. Hoffman;S.J. Sievert;R.D. Shaver;D.A. Welch

  • Effects of forage particle size and grain fermentability in midlactation cows. II. Ruminal pH and chewing activity.

    K.M. Krause;D.K. Combs;K.A. Beauchemin

  • Effects of Prepartum Diet, Inert Rumen Bulk, and Dietary Polyethylene Glycol on Dry Matter Intake of Lactating Dairy Cows

    T.R. Johnson;D.K. Combs

  • Effects of Forage Particle Size, Forage Source, and Grain Fermentability on Performance and Ruminal pH in Midlactation Cows

    K.M. Krause;D.K. Combs

  • Effects of Forage Particle Size and Grain Fermentability in Midlactation Cows. I. Milk Production and Diet Digestibility

    K.M. Krause;D.K. Combs;K.A. Beauchemin

  • Intake and milk production of cows fed diets that differed in dietary neutral detergent fiber and neutral detergent fiber digestibility

    C. Kendall;C. Leonardi;P.C. Hoffman;D.K. Combs

  • Effects of increasing levels of grain supplementation on rumen environment and lactation performance of dairy cows grazing grass-legume pasture.

    R.B. Reis;D.K. Combs

  • Effects of fat supplementation and immature alfalfa to concentrate ratio on lactation performance of dairy cattle.

    M.J. Jerred;D.J. Carroll;D.K. Combs;R.R. Grummer

  • Long-Term Effects of Acetate and Propionate on Voluntary Feed Intake by Midlactation Cows

    A.C. Sheperd;D.K. Combs

  • Performance of Lactating Dairy Cows Fed Alfalfa Silage or Perennial Ryegrass Silage

    P.C. Hoffman;D.K. Combs;M.D. Casler

  • Effects of Roasting, Extrusion, and Particle Size on the Feeding Value of Soybeans for Dairy Cows

    T.A. Scott;D.K. Combs;R.R. Grummer

  • Determination of Markers in Digesta and Feces by Direct Current Plasma Emission Spectroscopy

    D.K. Combs;L.D. Satter

  • Mineral concentrations in hair as indicators of mineral status: a review.

    Unknown

  • Variability of ovarian structures and plasma progesterone profiles in dairy cows with ovarian cysts.

    D.J. Carroll;R.A. Pierson;E.R. Hauser;R.R. Grummer

  • Effects of fat supplementation and immature alfalfa to concentrate ratio on plasma progesterone, energy balance and reproductive traits of dairy cattle

    D.J. Carroll;M.J. Jerred;R.R. Grummer;D.K. Combs

  • An On‐Farm Test of Perennial Forage Grass Varieties under Management Intensive Grazing

    M. D. Casler;D. J. Undersander;C. Fredericks;D. K. Combs

  • Effects of Increasing Levels of Refined Cornstarch in the Diet of Lactating Dairy Cows on Performance and Ruminal pH

    K.M. Krause;D.K. Combs;K.A. Beauchemin

  • An alternative method to assess 24-h ruminal in vitro neutral detergent fiber digestibility.

    J.P. Goeser;D.K. Combs

  • Effect of forage to concentrate ratio and intake level on utilization of early vegetative alfalfa silage by dairy cows.

    G. Llamas-Lamas;D.K. Combs

  • Effects of Inert Rumen Bulk on Dry Matter Intake in Early and Midlactation Cows Fed Diets Differing in Forage Content

    T.R. Johnson;D.K. Combs

  • Retention of Rare Earths by Hay Particles Following Incubation in Fresh or Autoclaved Rumen Fluid

    D.K. Combs;R.D. Shaver;L.D. Satter

Frequent Co-Authors

P.C. Hoffman
P.C. Hoffman University of Wisconsin–Madison
Randy D. Shaver
Randy D. Shaver University of Wisconsin–Madison
Ric R. Grummer
Ric R. Grummer University of Wisconsin–Madison
Karen A. Beauchemin
Karen A. Beauchemin Agriculture and Agriculture-Food Canada
Xusheng Guo
Xusheng Guo Lanzhou University
Milo C. Wiltbank
Milo C. Wiltbank University of Wisconsin–Madison
Paul M. Fricke
Paul M. Fricke University of Wisconsin–Madison
George E. Shook
George E. Shook University of Wisconsin–Madison
Louis E. Armentano
Louis E. Armentano University of Wisconsin–Madison
Glen A. Broderick
Glen A. Broderick University of Wisconsin–Madison

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Related Online Degrees & Career Pathways

For students interested in Animal Science and Veterinary studies, exploring complementary fields can broaden career opportunities. Many online programs offer flexibility and specialized training to enhance your expertise. For example, pursuing apa accredited psyd programs online can be an excellent path for those wanting to integrate behavioral science with animal welfare or veterinary psychology.

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By considering these related online degrees, students can develop a multifaceted approach to their careers, combining animal science with counseling and psychological principles for a well-rounded professional journey.

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