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
62
Citations
13768
World Ranking
288
National Ranking
100

A.J. Heinrichs 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 A.J. Heinrichs 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: 210 publications — 76th percentile

76% of scientists in this discipline score the same or lower.

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

A.J. Heinrichs 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 A.J. Heinrichs 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: 62 D-Index — 91st percentile

91% 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
  • 2018 - American Dairy Science Association Fellowship Award
  • 2009 - DuPont Pioneer Forage Award, American Dairy Science Association

Overview

A.J. Heinrichs is affiliated with Pennsylvania State University in the United States and has a research focus spanning several domains within agricultural and biological sciences, medicine, and biochemistry, genetics, and molecular biology. Their work predominantly addresses topics related to ruminant nutrition and digestive physiology, genetic and phenotypic traits in livestock, animal health and immunology, gastrointestinal disorders and treatments, viral gastroenteritis research and epidemiology, reproductive physiology in livestock, and the effects of environmental stressors on livestock.

The scientist's frequent coauthors include L.K. Mitchell, A.J. Lopez, Coleen Jones, Jason E. Lombard, and N.J. Urie, reflecting collaborative efforts primarily within the dairy science community.

Research findings by A.J. Heinrichs have been published mainly in the Journal of Dairy Science, with eleven publications, as well as in JDS Communications, Livestock Science, and the Journal of Animal Science. These venues underscore a focus on dairy science and livestock research.

Recent notable papers authored or coauthored by Heinrichs include:

  • Limiting total mixed ration availability alters eating and rumination patterns of lactating dairy cows, 2021, JDS Communications
  • Consensus recommendations on calf- and herd-level passive immunity in dairy calves in the United States, 2020, Journal of Dairy Science
  • Invited review: The importance of colostrum in the newborn dairy calf, 2022, Journal of Dairy Science
  • Comparison of immunoglobulin G absorption in calves fed maternal colostrum, a commercial whey-based colostrum replacer, or supplemented maternal colostrum, 2020, Journal of Dairy Science
  • Relationship of body weight at first calving with milk yield and herd life, 2020, Journal of Dairy Science

The scientist has received recognition through awards, including the American Dairy Science Association Fellowship Award in 2018 as well as the DuPont Pioneer Forage Award from the American Dairy Science Association in 2009.

Best Publications

  • A Simple Method for the Analysis of Particle Sizes of Forage and Total Mixed Rations

    B.P. Lammers;D.R. Buckmaster;A.J. Heinrichs

  • Modification of the Penn State Forage and Total Mixed Ration Particle Separator and the Effects of Moisture Content on its Measurements

    P.J. Kononoff;A.J. Heinrichs;D.R. Buckmaster

  • A Survey of Bovine Colostrum Composition and Colostrum Management Practices on Pennsylvania Dairy Farms

    S.I. Kehoe;B.M. Jayarao;A.J. Heinrichs

  • Predicting Body Weight and Wither Height in Holstein Heifers Using Body Measurements

    A.J. Heinrichs;G.W. Rogers;J.B. Cooper

  • Effects of supplemental yeast (Saccharomyces cerevisiae) culture on rumen development, growth characteristics, and blood parameters in neonatal dairy calves.

    K.E. Lesmeister;A.J. Heinrichs;M.T. Gabler

  • Raising dairy replacements to meet the needs of the 21st century

    A.J. Heinrichs

  • The Effect of Corn Silage Particle Size on Eating Behavior, Chewing Activities, and Rumen Fermentation in Lactating Dairy Cows

    P.J. Kononoff;A.J. Heinrichs;H.A. Lehman

  • Effects of Mannan Oligosaccharide or Antibiotics in Neonatal Diets on Health and Growth of Dairy Calves

    A.J. Heinrichs;C.M. Jones;B.S. Heinrichs

  • Effects of Corn Processing on Growth Characteristics, Rumen Development, and Rumen Parameters in Neonatal Dairy Calves

    K.E. Lesmeister;A.J. Heinrichs

  • What affects the costs of raising replacement dairy heifers : A multiple-component analysis

    P.R. Tozer;A.J. Heinrichs

  • Prediction of manure and nutrient excretion from dairy cattle.

    T. D. Nennich;J. H. Harrison;L. M. VanWieringen;Deanne Meyer

  • A prospective study of calf factors affecting first-lactation and lifetime milk production and age of cows when removed from the herd1

    A.J. Heinrichs;B.S. Heinrichs

  • Consensus recommendations on calf- and herd-level passive immunity in dairy calves in the United States

    J. Lombard;N. Urie;F. Garry;S. Godden

  • Standards of weight and height for Holstein heifers.

    A.J. Heinrichs;G.L. Hargrove

  • Meta-Analysis to Assess Effect of Prepubertal Average Daily Gain of Holstein Heifers on First-Lactation Production*

    G.I. Zanton;A.J. Heinrichs

  • A meta-analysis of the effects of preweaned calf nutrition and growth on first-lactation performance

    S.L. Gelsinger;A.J. Heinrichs;C.M. Jones

  • Development and analysis of a rumen tissue sampling procedure.

    K.E. Lesmeister;P.R. Tozer;A.J. Heinrichs

  • The effect of reducing alfalfa haylage particle size on cows in early lactation.

    P.J. Kononoff;A.J. Heinrichs

  • Rumen development in the dairy calf.

    A. J. Heinrichs;K. E. Lesmeister;P. C. Garnsworthy

  • The effect of corn silage particle size and cottonseed hulls on cows in early lactation.

    P.J. Kononoff;A.J. Heinrichs

  • Development of a cost analysis spreadsheet for calculating the costs to raise a replacement dairy heifer.

    M.T. Gabler;P.R. Tozer;A.J. Heinrichs

Frequent Co-Authors

Gabriella A. Varga
Gabriella A. Varga Pennsylvania State University
T.M. Hill
T.M. Hill Provimi
Paul J. Kononoff
Paul J. Kononoff University of Nebraska–Lincoln
Chad Daniel Dechow
Chad Daniel Dechow Pennsylvania State University
J.M. Aldrich
J.M. Aldrich CSA Animal Nutrition
Andrea Formigoni
Andrea Formigoni University of Bologna
Hollis N. Erb
Hollis N. Erb Cornell University
Kenneth J. Stalder
Kenneth J. Stalder Iowa State University

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Related Online Degrees & Career Pathways

Pursuing a career in Animal Science and Veterinary fields opens doors to various related disciplines that are equally impactful and often available through flexible online formats. For those interested in mental health aspects tied to animal therapy or human-animal interaction, exploring online school psychology programs can provide valuable insights and credentials with convenience.

Similarly, students aiming to blend psychological expertise with practical experience may consider apa accredited psyd programs, which offer a streamlined path to clinical psychology without the additional GRE hurdle. These programs can complement animal science careers focused on behavioral studies or therapy.

For those wanting to specialize in helping individuals and communities, degrees such as a substance abuse counselor degree online provide essential training for addressing addiction issues, often related to animal welfare environments like rehabilitation centers.

Lastly, the human-animal bond plays a crucial role in family dynamics, making marriage and family therapy masters programs online a relevant option for individuals seeking a career that supports holistic well-being across families, including pets. These interconnected pathways highlight the multidisciplinary potential within and around Animal Science and Veterinary studies.

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