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

D-Index & Metrics

Animal Science and Veterinary

D-Index
64
Citations
13350
World Ranking
255
National Ranking
86

Research.com Recognitions

  • 2023 - Research.com Animal Science and Veterinary in United States Leader Award
  • 2020 - American Dairy Science Association Fellowship Award
  • 2012 - American Feed Industry Association Award, American Dairy Science Association

Overview

What is he best known for?

The fields of study he is best known for:

  • Bacteria
  • Biochemistry
  • Gene

Jeffrey L. Firkins spends much of his time researching Rumen, Food science, Digestion, Dairy cattle and Neutral Detergent Fiber. His Rumen research is multidisciplinary, incorporating perspectives in Dry matter, Animal science and Nutrient. His Nutrient research includes themes of Silage, Forage and Metabolism.

His work carried out in the field of Silage brings together such families of science as Feed conversion ratio and Latin square. His Digestion research incorporates themes from Protein degradation and Starch. His Dairy cattle research is multidisciplinary, incorporating elements of Microbial metabolism, Defaunation, Microbiology, Biomass and Metagenomics.

His most cited work include:

  • Special topics--Mitigation of methane and nitrous oxide emissions from animal operations: I. A review of enteric methane mitigation options. (448 citations)
  • Development of an Assay to Quantify Rumen Ciliate Protozoal Biomass in Cows Using Real-Time PCR (252 citations)
  • Effects of grain variability and processing on starch utilization by lactating dairy cattle (190 citations)

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

His primary scientific interests are in Rumen, Food science, Animal science, Dry matter and Neutral Detergent Fiber. His Rumen research integrates issues from Silage, Dairy cattle and Forage. The Digestion and Tallow research Jeffrey L. Firkins does as part of his general Food science study is frequently linked to other disciplines of science, such as Unsaturated fat, therefore creating a link between diverse domains of science.

In his study, which falls under the umbrella issue of Animal science, Greenhouse gas is strongly linked to Agronomy. His biological study spans a wide range of topics, including Urea and Methanogenesis. His research integrates issues of Starch and Isovalerate in his study of Neutral Detergent Fiber.

He most often published in these fields:

  • Rumen (58.99%)
  • Food science (43.17%)
  • Animal science (32.37%)

What were the highlights of his more recent work (between 2014-2021)?

  • Rumen (58.99%)
  • Animal science (32.37%)
  • Neutral Detergent Fiber (28.06%)

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

Jeffrey L. Firkins focuses on Rumen, Animal science, Neutral Detergent Fiber, Dry matter and Food science. The concepts of his Rumen study are interwoven with issues in Ciliate, Protozoa and Bacteria. His research in the fields of Dairy cattle overlaps with other disciplines such as Mean squared prediction error and Polynomial regression.

His Neutral Detergent Fiber study combines topics from a wide range of disciplines, such as Silage, Starch and Isovalerate. Jeffrey L. Firkins has included themes like Methanogenesis, Propionate, Ammonium and Latin square in his Dry matter study. His study of Digestion is a part of Food science.

Between 2014 and 2021, his most popular works were:

  • New roles in hemicellulosic sugar fermentation for the uncultivated Bacteroidetes family BS11 (56 citations)
  • Interspecies cross-feeding orchestrates carbon degradation in the rumen ecosystem (55 citations)
  • Meta-analysis of postruminal microbial nitrogen flows in dairy cattle. I. Derivation of equations (47 citations)

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

  • Bacteria
  • Biochemistry
  • Gene

Jeffrey L. Firkins mainly investigates Rumen, Biochemistry, Biotechnology, Bacteria and Starch. He brings together Rumen and Microbial food web to produce work in his papers. His Fermentation and Glycolysis study, which is part of a larger body of work in Biochemistry, is frequently linked to NAD+ kinase, bridging the gap between disciplines.

His Biotechnology research is multidisciplinary, relying on both Fiber, Neutral Detergent Fiber, Forage and Animal science. In Bacteria, Jeffrey L. Firkins works on issues like Protozoa, which are connected to Food science, Carbohydrate, Carbohydrate synthesis and Butyrate. His Starch research incorporates elements of Dairy cattle and Dry matter.

Best Publications

  • Special topics--Mitigation of methane and nitrous oxide emissions from animal operations: I. A review of enteric methane mitigation options.

    A. N. Hristov;J. Oh;J. L. Firkins;J. Dijkstra

  • Development of an Assay to Quantify Rumen Ciliate Protozoal Biomass in Cows Using Real-Time PCR

    John T. Sylvester;Sanjay K. R. Karnati;Zhongtang Yu;Mark Morrison

  • Mitigation of greenhouse gas emissions in livestock production - A review of technical options for non-CO2 emissions

    A.N. Hristov;J. Oh;C. Lee;R. Meinen

  • Technical options for the mitigation of direct methane and nitrous oxide emissions from livestock: a review

    P.J. Gerber;A.N. Hristov;B.L. Henderson;H.P.S. Makkar

  • Mitigation of methane and nitrous oxide emissions from animal operations: III. A review of animal management mitigation options

    A.N. Hristov;T. Ott;J. Tricarico;A. Rotz

  • Ruminal nitrogen metabolism: perspectives for integration of microbiology and nutrition for dairy.

    J.L. Firkins;Z. Yu;M. Morrison

  • Effects of grain variability and processing on starch utilization by lactating dairy cattle

    J. L. Firkins;M. L. Eastridge;N. R. St-Pierre;S. M. Noftsger

  • Special topics--Mitigation of methane and nitrous oxide emissions from animal operations: III. A review of animal management mitigation options.

    A. N. Hristov;T. Ott;J. Tricarico;A. Rotz

  • Effects of Fat Saturation and Source of Fiber on Site of Nutrient Digestion and Milk Production by Lactating Dairy Cows

    J. Pantoja;J.L. Firkins;M.L. Eastridge;B.L. Hull

  • 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

  • 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 feeding nonforage fiber sources on site of fiber digestion.

    Jeffrey L. Firkins

  • Evaluation of wet and dry distillers grains and wet and dry corn gluten feeds for ruminants

    J. L. Firkins;L. L. Berger;G. C. Fahey

  • Maximizing microbial protein synthesis in the rumen.

    Jeffrey L. Firkins

  • Interspecies cross-feeding orchestrates carbon degradation in the rumen ecosystem

    Lindsey M. Solden;Adrian E. Naas;Simon Roux;Rebecca A. Daly

  • Integration of ruminal metabolism in dairy cattle.

    J. L. Firkins;Alexander Nikolov Hristov;M. B. Hall;G. A. Varga

  • Effects of urea infusion and ruminal degradable protein concentration on microbial growth, digestibility, and fermentation in continuous culture

    K. E. Griswold;G. A. Apgar;J. Bouton;J. L. Firkins

  • Effects of varying forage and concentrate carbohydrates on nutrient digestibilities and milk production by dairy cows.

    M. Sarwar;J.L. Firkins;M.L. Eastridge

  • Effect of intake and forage level on ruminal turnover rates, bacterial protein synthesis and duodenal amino acid flows in sheep.

    Neal R Merchen;J. L. Firkins;L. L. Berger

  • Modeling ruminal digestibility of carbohydrates and microbial protein flow to the duodenum.

    J.L. Firkins;M.S. Allen;B.S. Oldick;N.R. St-Pierre

  • Effects of degree of fat saturation on fiber digestion and microbial protein synthesis when diets are fed twelve times daily.

    B S Oldick;J L Firkins

  • Effect of replacing neutral detergent fiber of forage with soyhulls and corn gluten feed for dairy heifers

    M. Sarwar;J.L. Firkins;M.L. Eastridge

  • New roles in hemicellulosic sugar fermentation for the uncultivated Bacteroidetes family BS11

    Lindsey M Solden;David W Hoyt;William B Collins;Johanna E Plank

  • Site of nutrient digestion by dairy cows fed corn of different particle sizes or steam-rolled

    S.L. Callison;J.L. Firkins;M.L. Eastridge;B.L. Hull

  • Kinetics of hydration and functional specific gravity of fibrous feed by-products.

    S A Bhatti;J L Firkins

Frequent Co-Authors

M.L. Eastridge
M.L. Eastridge The Ohio State University
Zhongtang Yu
Zhongtang Yu The Ohio State University
N.R. St-Pierre
N.R. St-Pierre The Ohio State University
Alexander N. Hristov
Alexander N. Hristov Pennsylvania State University
Chanhee Lee
Chanhee Lee The Ohio State University
William P. Weiss
William P. Weiss The Ohio State University
Ermias Kebreab
Ermias Kebreab University of California, Davis
Paul J. Kononoff
Paul J. Kononoff University of Nebraska–Lincoln
Adegbola T. Adesogan
Adegbola T. Adesogan University of Florida
Jan Dijkstra
Jan Dijkstra Wageningen University & Research

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

Pursuing a degree in Animal Science or Veterinary studies opens doors to diverse career paths, many of which extend beyond traditional veterinary roles. For those interested in the behavioral aspects of animal care and human-animal interactions, exploring psychology-related fields can be beneficial. Programs like nasp school psychology programs offer insights into developmental and behavioral support, which can complement animal science knowledge in roles such as therapy animal coordination or rehabilitation.

If you’re considering advanced studies, online apa accredited psyd programs provide a pathway to clinical expertise, useful for those interested in counseling roles that emphasize human well-being alongside animal-assisted therapy.

Many students also find a rewarding career in addressing complex social issues by obtaining specialized qualifications such as an online addiction counseling degree. These skills are valuable in veterinary contexts where addressing substance abuse and mental health in animal owners can impact animal care outcomes.

Finally, mft master’s programs online provide training in relationship dynamics, which are increasingly relevant in animal-assisted family therapy and community health initiatives involving animals. Together, these pathways enrich the traditional veterinary landscape with broader, impactful career opportunities.

Best Scientists Citing Jeffrey L. Firkins

Trending Scientists

Recently Published Articles