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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Animal Science and Veterinary 30 2434 2214 40 39 116 3569

David Pacheco publications per year

The chart shows the history of publications by David Pacheco between 1995 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. David Pacheco published across 31 years, from 1995 to 2025, averaging 4.5 papers a year. Output peaked at 10 publications in 2017. 15 of the 139 publications appeared in the last two years.

No. of publications
2 4 6 8 10
Bar chart. Horizontal axis: year, 1995 to 2025. Vertical axis: number of publications, 0 to 10. Peak 10 publications in 2017. 1995: 2 publications 1996: 0 publications 1997: 0 publications 1998: 0 publications 1999: 0 publications 2000: 0 publications 2001: 0 publications 2002: 0 publications 2003: 3 publications 2004: 4 publications 2005: 2 publications 2006: 6 publications 2007: 4 publications 2008: 8 publications 2009: 3 publications 2010: 6 publications 2011: 2 publications 2012: 6 publications 2013: 6 publications 2014: 5 publications 2015: 6 publications 2016: 9 publications 2017: 10 publications 2018: 2 publications 2019: 6 publications 2020: 8 publications 2021: 10 publications 2022: 9 publications 2023: 7 publications 2024: 6 publications 2025: 9 publications
1995 2025

139 publications in total across all disciplines

View publications per year as a table
David Pacheco: publications per year, 1995 to 2025
Year Publications
1995 2
1996 0
1997 0
1998 0
1999 0
2000 0
2001 0
2002 0
2003 3
2004 4
2005 2
2006 6
2007 4
2008 8
2009 3
2010 6
2011 2
2012 6
2013 6
2014 5
2015 6
2016 9
2017 10
2018 2
2019 6
2020 8
2021 10
2022 9
2023 7
2024 6
2025 9
Total 139
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David Pacheco publications per year - data summary

  • David Pacheco, a Animal Science and Veterinary scholar from New Zealand Agricultural Greenhouse Gas Research Centre (NZAGRC), has 139 publications recorded across 31 years, from 1995 to 2025.
  • The oldest publication on record dates to 1995 and the most recent to 2025.
  • The most productive years are 2017 and 2021, with 10 publications each.
  • The least productive years with any output are 1995, 2005, 2011 and 2018, with 2 publications each.
  • 7 of the 31 years in the span carry no publications at all (1996, 1997, 1998, 1999 and others).
  • The rate of publication averages 4.5 papers per year over the whole span, or 5.8 per year counting only the 24 years with at least one publication.
  • The last 5 years on the chart (2021-2025) hold 41 publications, 29% of the career total.
  • Split into equal eras - 1995-2005: 11 publications (1.0 per year); 2006-2016: 61 publications (5.5 per year); 2017-2025: 67 publications (7.4 per year).
  • Comparing the opening and closing eras, the overall trend of publication is rising.

David Pacheco 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 David Pacheco sits on this spectrum.

No. of scientists
25 50 75 100
Bar chart with 84 bars. Horizontal axis: publications, 29–33 to 442+. Vertical axis: number of scientists, 0 to 109. Most scientists, 109, have 119–123 publications. The last bar groups every scientist with 442 publications or more. The highlighted bar, 114–118 publications, is where this scientist sits. 29–33 publications: 1 scientist 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
29–33 publications 442+

This scientist: 116 publications — 36th percentile

36% of scientists in this discipline score the same or lower.

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

View publications distribution as a table
Number of Animal Science and Veterinary scientists by publication count, Research.com 2026 ranking edition. Based on 3,155 ranked scientists.
Publications Scientists This scientist
29–33 1
34–38 6
39–43 17
44–48 23
49–53 28
54–58 44
59–63 66
64–68 75
69–73 71
74–78 85
79–83 108
84–88 105
89–93 84
94–98 103
99–103 97
104–108 95
109–113 89
114–118 88 116
119–123 109
124–128 93
129–133 89
134–138 95
139–143 92
144–148 80
149–153 75
154–158 74
159–163 67
164–168 53
169–173 62
174–178 63
179–183 50
184–188 55
189–193 50
194–198 27
199–203 44
204–208 31
209–213 28
214–218 38
219–223 33
224–228 36
229–233 29
234–238 35
239–243 23
244–248 24
249–253 29
254–258 28
259–263 21
264–268 25
269–273 11
274–278 18
279–283 13
284–288 18
289–293 10
294–298 12
299–303 11
304–308 15
309–313 14
314–318 14
319–323 8
324–328 8
329–333 13
334–338 14
339–343 13
344–348 10
349–353 11
354–358 5
359–363 8
364–368 8
369–373 6
374–378 7
379–383 8
384–388 3
389–393 4
394–398 5
399–403 8
404–408 5
409–413 4
414–418 3
419–423 8
424–428 5
429–433 3
434–438 5
439–441 5
442+ 99
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David Pacheco publication distribution in Animal Science and Veterinary in 2026 - data summary

  • The chart plots the publication count of all 3,155 Animal Science and Veterinary scientists ranked by Research.com in 2026, grouped into 84 ranges running from 29–33 to 442+ publications.
  • David Pacheco, a Animal Science and Veterinary scholar from New Zealand Agricultural Greenhouse Gas Research Centre (NZAGRC), records 116 publications - the 36th percentile of the discipline.
  • 36% of ranked Animal Science and Veterinary scientists score the same or lower than David Pacheco, and about 64% score higher.
  • The median of the discipline falls in the 139–143 publications range, and David Pacheco ranks below the median.
  • The most crowded range is 119–123 publications, holding 109 scientists (3% of the field).
  • 47% of the field sits in the lowest quarter of the value range (up to 129–133 publications), so the distribution leans towards the lower end of the scale.
  • The final bar has no upper bound: it groups every scientist with 442 publications or more, 99 scientists in all (3% of the field).

David Pacheco 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 David Pacheco sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 58 bars. Horizontal axis: D-Index, 20 to 77+. Vertical axis: number of scientists, 0 to 158. Most scientists, 158, have 31 D-Index. The last bar groups every scientist with 77 D-Index or more. The highlighted bar, 30 D-Index, is where this scientist sits. 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: 30 D-Index — 25th percentile

25% of scientists in this discipline score the same or lower.

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

View D-Index distribution as a table
Number of Animal Science and Veterinary scientists by D-index, Research.com 2026 ranking edition. Based on 3,155 ranked scientists.
D-Index Scientists This scientist
20 5
21 22
22 31
23 44
24 53
25 66
26 80
27 101
28 106
29 116
30 154 30
31 158
32 143
33 137
34 126
35 134
36 112
37 115
38 105
39 111
40 107
41 87
42 74
43 62
44 61
45 41
46 51
47 43
48 28
49 47
50 40
51 34
52 33
53 43
54 16
55 32
56 21
57 18
58 28
59 33
60 17
61 21
62 18
63 21
64 9
65 20
66 11
67 16
68 12
69 17
70 13
71 15
72 11
73 11
74 14
75 5
76 6
77+ 100
Download as CSV

David Pacheco D-index placement in Animal Science and Veterinary in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 3,155 Animal Science and Veterinary scientists ranked by Research.com in 2026, grouped into 58 ranges running from 20 to 77+ D-Index.
  • David Pacheco, a Animal Science and Veterinary scholar from New Zealand Agricultural Greenhouse Gas Research Centre (NZAGRC), records 30 D-Index - the 25th percentile of the discipline.
  • 25% of ranked Animal Science and Veterinary scientists score the same or lower than David Pacheco, and about 75% score higher.
  • The median of the discipline falls in the 36 D-Index range, and David Pacheco ranks below the median.
  • The most crowded range is 31 D-Index, holding 158 scientists (5% of the field).
  • 43% of the field sits in the lowest quarter of the value range (up to 34 D-Index), so the distribution leans towards the lower end of the scale.
  • The final bar has no upper bound: it groups every scientist with 77 D-Index or more, 100 scientists in all (3% of the field).

Overview

David Pacheco is a researcher affiliated with AgResearch in New Zealand. Their work primarily focuses on agricultural and biological sciences, with a strong emphasis on agronomy and crop science. They have contributed to research in several interconnected subfields, including genetics, animal science and zoology, molecular biology, and environmental chemistry.

The main research topics covered by David Pacheco include:

  • Ruminant Nutrition and Digestive Physiology
  • Reproductive Physiology in Livestock
  • Genetic and phenotypic traits in livestock
  • Bioenergy crop production and management
  • Agriculture Sustainability and Environmental Impact
  • Soil and Water Nutrient Dynamics
  • Nitrogen and Sulfur Effects on Brassica

Their recent publications exhibit an interest in methane emissions related to ruminants, forage quality, and environmental impacts of livestock feeding strategies. Notable recent papers include:

  • "A Review: Plant Carbohydrate Types-The Potential Impact on Ruminant Methane Emissions" (2022), published in Frontiers in Veterinary Science
  • "Effect of feeding fresh forage plantain (Plantago lanceolata) or ryegrass-based pasture on methane emissions, total-tract digestibility, and rumen fermentation of nonlactating dairy cows" (2022), Journal of Dairy Science
  • "Activated carbon from Water Hyacinth as electrocatalyst for oxygen reduction reaction in an alkaline fuel cell" (2021), International Journal of Hydrogen Energy
  • "Prediction of nitrogen excretion from data on dairy cows fed a wide range of diets compiled in an intercontinental database: A meta-analysis" (2022), Journal of Dairy Science
  • "Methane emissions and rumen metabolite concentrations in cattle fed two different silages" (2022), Scientific Reports

David Pacheco has published extensively in several scientific journals, frequently contributing to:

  • Journal of Dairy Science
  • Animal Feed Science and Technology
  • New Zealand Journal of Agricultural Research
  • Scientific Reports
  • Journal of Animal Science

The researcher collaborates regularly with various scientists in related fields. Frequent co-authors include:

  • Arjan Jonker
  • M. M. Della Rosa
  • E. Sandoval
  • Peter H. Janssen
  • Rubén Pulido

David Pacheco's work reflects a multidisciplinary approach integrating animal nutrition, genetics, environmental science, and sustainable agricultural practices. Their research contributes data and analyses aimed at understanding and improving livestock production systems with a focus on environmental outcomes such as methane emissions and nutrient management.

Best Publications

  • Methane production from in vitro rumen incubations with Lotus pedunculatus and Medicago sativa, and effects of extractable condensed tannin fractions on methanogenesis

    Michael H. Tavendale;Lucy P. Meagher;David Pacheco;Nicola Walker

  • Milk protein synthesis as a function of amino acid supply.

    L. Doepel;L. Doepel;D. Pacheco;J.J. Kennelly;M.D. Hanigan

  • The route of absorbed nitrogen into milk protein

    H. Lapierre;R. Berthiaume;G. Raggio;M. C. Thivierge

  • Dietary nitrogen - definitions, digestion, excretion and consequences of excess for grazing ruminants

    D. Pacheco;G.C. Waghorn

  • Effect of Level of Metabolizable Protein on Splanchnic Flux of Amino Acids in Lactating Dairy Cows

    G. Raggio;D. Pacheco;R. Berthiaume;G.E. Lobley

  • What is the true supply of amino acids for a dairy cow

    H. Lapierre;D. Pacheco;R. Berthiaume;D.R. Ouellet

  • Methane emissions from sheep fed fresh brassicas (Brassica spp.) compared to perennial ryegrass (Lolium perenne)

    X.Z. Sun;G.C. Waghorn;S.O. Hoskin;Scott James Harrison

  • Production of indolic compounds by rumen bacteria isolated from grazing ruminants

    G. Attwood;D. Li;D. Pacheco;M. Tavendale

  • Responses of the bovine mammary glands to absorptive supply of single amino acids

    J. P. Cant;R. Berthiaume;H. Lapierre;P. H. Luimes

  • The effects of fresh forages and feed intake level on digesta kinetics and enteric methane emissions from sheep

    K.J. Hammond;D. Pacheco;J.L. Burke;J.P. Koolaard

  • A novel concept to reduce nitrogen losses from grazed pastures by administering soil nitrogen process inhibitors to ruminant animals: A study with sheep

    S.F. Ledgard;J.C. Menneer;M.M. Dexter;M.J. Kear

  • Lambs fed fresh winter forage rape (Brassica napus L.) emit less methane than those fed perennial ryegrass (Lolium perenne L.), and possible mechanisms behind the difference.

    Xuezhao Sun;Gemma Henderson;Faith Cox;German Molano

  • Decreasing methane emissions from ruminants grazing forages: a fit with productive and financial realities?

    David Pacheco;Garry Waghorn;Peter H. Janssen

  • Initiation and elongation steps of mRNA translation are involved in the increase in milk protein yield caused by growth hormone administration during lactation.

    A.A. Hayashi;K. Nones;N.C. Roy;W.C. McNabb

  • Sampling procedure for the measurement of dissolved hydrogen and volatile fatty acids in the rumen of dairy cows.

    M. Wang;R. Wang;P. H. Janssen;X. M. Zhang

  • Ryegrasses with increased water soluble carbohydrate: evaluating the potential for grazing dairy cows in New Zealand

    G.P. Cosgrove;J.L. Burke;A.F. Death;M.J. Hickey

  • A mathematical model to describe in vitro kinetics of H2 gas accumulation

    M. Wang;P.H. Janssen;X.Z. Sun;S. Muetzel

  • Prediction of nitrogen excretion from data on dairy cows fed a wide range of diets compiled in an intercontinental database: A meta-analysis.

    Unknown

  • Nitrous oxide emission factors for urine and dung from sheep fed either fresh forage rape (Brassica napus L.) or fresh perennial ryegrass (Lolium perenne L.).

    J. Luo;X. Z. Sun;D. Pacheco;S. F. Ledgard

  • Deriving fractional rate of degradation of logistic-exponential (LE) model to evaluate early in vitro fermentation

    M. Wang;X. Z. Sun;S. X. Tang;Z. L. Tan

  • Development of an improved representation of rumen digesta outflow in a mechanistic and dynamic model of a dairy cow, Molly

    Pablo Gregorini;Pierre Beukes;Garry Waghorn;David Pacheco

  • Sheep fed forage chicory (Cichorium intybus) or perennial ryegrass (Lolium perenne) have similar methane emissions

    X.Z. Sun;S.O. Hoskin;G.G. Zhang;G. Molano

  • Forage brassica: a feed to mitigate enteric methane emissions?

    Xuezhao Sun;David Pacheco;Dongwen Luo

  • Muscle free amino acid profiles are related to differences in skeletal muscle growth between single and twin ovine fetuses near term

    Francisco Sales;David Pacheco;Hugh Blair;Paul Kenyon

Frequent Co-Authors

R. Berthiaume
R. Berthiaume Agriculture and Agriculture-Food Canada
Ermias Kebreab
Ermias Kebreab University of California, Davis
Roger Hegarty
Roger Hegarty AgResearch
Hélène Lapierre
Hélène Lapierre Agriculture and Agriculture-Food Canada
Gerald E. Lobley
Gerald E. Lobley University of Aberdeen
P. R. Kenyon
P. R. Kenyon Massey University
Pascal Dubreuil
Pascal Dubreuil University of Montreal
Warren C. McNabb
Warren C. McNabb Massey University
John Nolan
John Nolan University of New England

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