World's Best Scientists 2026 revealed!
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Animal Science and Veterinary
USA
2023

D-Index & Metrics

Animal Science and Veterinary

D-Index
65
Citations
12628
World Ranking
245
National Ranking
80

J.H. Clark 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 J.H. Clark 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: 138 publications — 50th percentile

50% of scientists in this discipline score the same or lower.

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

J.H. Clark 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 J.H. Clark 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: 65 D-Index — 93rd percentile

93% of scientists in this discipline score the same or lower.

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

Research.com Recognitions

  • 2023 - Research.com Animal Science and Veterinary in United States Leader Award
  • 2005 - AFIA - FASS New Frontiers in Animal Nutrition Award, American Society of Animal Science
  • 2003 - American Dairy Science Association Fellowship Award
  • 2002 - Distinguished Service Award, American Dairy Science Association
  • 2000 - Award of Honor, American Dairy Science Association
  • 1998 - Zinpro Award for Excellence in Dairy Science, American Dairy Science Association
  • 1994 - American Feed Industry Association Award in Ruminant Nutrition Research, American Society of Animal Science
  • 1980 - American Feed Industry Association Award, American Dairy Science Association

Overview

J.H. Clark is affiliated with the University of Illinois at Urbana-Champaign in the United States. Their research primarily focuses on agricultural and biological sciences, with significant contributions to subfields including agronomy and crop science, animal science and zoology, nutrition and dietetics, and genetics.

The scientist's recent work involves topics such as ruminant nutrition and digestive physiology, meat and animal product quality, fatty acid research and health, reproductive physiology in livestock, and genetic and phenotypic traits in livestock. This body of work emphasizes both the metabolic and physiological dimensions of dairy and livestock production.

J.H. Clark has published in venues that concentrate on dairy science, notably the Journal of Dairy Science. Their notable recent papers include:

  • Functional properties of cream from dairy cows with experimentally altered milk fat composition (2022, Journal of Dairy Science)
  • Production, metabolism, and follicular dynamics in multiparous dairy cows fed diets providing different amounts of metabolizable protein prepartum and postpartum (2022, Journal of Dairy Science)

The scientist frequently collaborates with several researchers in the field. Some of their prominent coauthors include J.K. Drackley, Gerardo Ortiz Gonzalez, Rafael Jiménez-Flores, D.R. Bremmer, and E.J. DePeters.

Throughout their career, J.H. Clark has received multiple awards from recognized professional societies focusing on animal science and dairy science. These include the American Feed Industry Association Award (1980), American Feed Industry Association Award in Ruminant Nutrition Research (1994), Zinpro Award for Excellence in Dairy Science (1998), Award of Honor from the American Dairy Science Association (2000), Distinguished Service Award from the American Dairy Science Association (2002), American Dairy Science Association Fellowship Award (2003), and the AFIA - FASS New Frontiers in Animal Nutrition Award from the American Society of Animal Science (2005).

Best Publications

  • Microbial protein synthesis and flows of nitrogen fractions to the duodenum of dairy cows.

    J.H. Clark;T.H. Klusmeyer;M.R. Cameron

  • Relationship between ovarian activity and energy status during the early postpartum period of high producing dairy cows.

    C.R. Staples;W.W. Thatcher;J.H. Clark

  • Lactational Responses to Postruminal Administration of Proteins and Amino Acids

    Jimmy H. Clark

  • Effects of source of protein and carbohydrate on ruminal fermentation and passage of nutrients to the small intestine of lactating cows.

    R.D. McCarthy;T.H. Klusmeyer;J.L. Vicini;J.H. Clark

  • Variants of somatotropin in cattle: gene frequencies in major dairy breeds and associated milk production☆

    M.C. Lucy;S.D. Hauser;P.J. Eppard;G.G. Krivi

  • Influence of diet composition, dry-matter intake, milk production and energy balance on time of post-partum ovulation and fertility in dairy cows

    M. C. Lucy;C. R. Staples;W. W. Thatcher;Peter S. Erickson

  • Milk Production, Nitrogen Utilization and Glucose Synthesis in Lactating Cows Infused Postruminally with Sodium Caseinate and Glucose

    Jimmy H. Clark;Howard R. Spires;Robert G. Derrig;Maurice R. Bennink

  • Evaluation of Chemical and Physical Properties of Feeds That Affect Protein Metabolism In the Rumen

    M.D. Stern;G.A. Varga;J.H. Clark;J.L. Firkins

  • Effects of urea and starch on rumen fermentation, nutrient passage to the duodenum, and performance of cows.

    M.R. Cameron;T.H. Klusmeyer;G.L. Lynch;J.H. Clark

  • Soyhulls as an alternative feed for lactating dairy cows: a review.

    I.R. Ipharraguerre;J.H. Clark

  • Infusion of long-chain fatty acids varying in saturation and chain length into the abomasum of lactating dairy cows.

    J.K. Drackley;T.H. Klusmeyer;A.M. Trusk;J.H. Clark

  • Ontogeny of the estrogen receptor during early uterine development.

    James H. Clark;Jack Gorski

  • Usefulness of ionophores for lactating dairy cows: a review

    Ignacio R Ipharraguerre;Jimmy H Clark

  • Ruminal fermentation and passage of nutrients to the duodenum of lactating cows fed mixtures of corn and barley

    T.R. Overton;M.R. Cameron;J.P. Elliottt;J.H. Clark

  • Alteration of rumen fermentation, milk fat synthesis, and nutrient utilization with mineral salts in dairy cows.

    J.A. Rogers;C.L. Davis;J.H. Clark

  • Effects of prilled fatty acids and calcium salts of fatty acids on rumen fermentation, nutrient digestibilities, milk production, and milk composition.

    D.J. Schauff;J.H. Clark

  • Effects of feeding diets containing calcium salts of long-chain fatty acids to lactating dairy cows.

    D.J. Schauff;J.H. Clark

  • Milk production and nitrogen utilization in response to postruminal infusion of sodium caseinate in lactating cows.

    H. R. Spires;J. H. Clark;R. G. Derrig;C. L. Davis

  • Impacts of the source and amount of crude protein on the intestinal supply of nitrogen fractions and performance of dairy cows.

    I.R. Ipharraguerre;J.H. Clark

  • Effect of abomasal infusion of sodium caseinate on milk yield, nitrogen utilization and amino acid nutrition of the dairy cow.

    R. G. Derrig;J. H. Clark;C. L. Davis

Frequent Co-Authors

James K. Drackley
James K. Drackley University of Illinois at Urbana-Champaign
C.L. Davis
C.L. Davis University of Illinois at Urbana-Champaign
Thomas R. Overton
Thomas R. Overton Cornell University
Brian A Crooker
Brian A Crooker University of Minnesota
George C. Fahey
George C. Fahey University of Illinois at Urbana-Champaign
Michael R. Murphy
Michael R. Murphy University of Illinois at Urbana-Champaign
Roger D. Shanks
Roger D. Shanks University of Illinois at Urbana-Champaign
Neal R Merchen
Neal R Merchen University of Illinois at Urbana-Champaign
Larry L. Berger
Larry L. Berger University of Illinois at Urbana-Champaign
Dale E. Bauman
Dale E. Bauman Cornell University

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Related Online Degrees & Career Pathways

Exploring online degrees related to Animal Science and Veterinary studies opens up diverse career opportunities. Careers in fields requiring a deep understanding of animal biology, behavior, and health are expanding, making a degree in this area highly valuable. For those interested in broadening their options, the list of careers with animals offers insight into various roles—from wildlife conservation to animal nutrition and beyond.

Some students may also consider branching into sports and athletic administration, where leadership and management skills combine with health knowledge. To understand such roles better, learn about the athletic director salary and career pathways, which can complement studies in animal health, especially in areas like equine therapy and animal-assisted sports.

Meanwhile, degrees in exercise science can intersect with veterinary interests, particularly when focusing on animal mobility and rehabilitation. Many programs now offer exercise science degrees online, providing flexible learning options for students balancing other commitments.

Additionally, students pursuing behavior-focused careers might explore certification options through bacb accredited schools. These programs prepare candidates for board certification in behavior analysis, a valuable credential for professionals working with both animals and humans.

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