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D. A. Roland

D-Index & Metrics

Discipline name D-Index World Ranking National Ranking Publications Citations
Animal Science and Veterinary 34 1894 544 153 3983

D. A. Roland publications per year

The chart shows the history of publications by D. A. Roland between 1971 and 2009, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. D. A. Roland published across 39 years, from 1971 to 2009, averaging 4.6 papers a year. Output peaked at 9 publications in 1975. 12 of the 181 publications appeared in the last two years.

No. of publications
2 4 6 8
Bar chart. Horizontal axis: year, 1971 to 2009. Vertical axis: number of publications, 0 to 9. Peak 9 publications in 1975. 1971: 3 publications 1972: 7 publications 1973: 8 publications 1974: 6 publications 1975: 9 publications 1976: 6 publications 1977: 7 publications 1978: 4 publications 1979: 3 publications 1980: 3 publications 1981: 3 publications 1982: 3 publications 1983: 5 publications 1984: 4 publications 1985: 3 publications 1986: 8 publications 1987: 2 publications 1988: 3 publications 1989: 4 publications 1990: 7 publications 1991: 7 publications 1992: 7 publications 1993: 4 publications 1994: 1 publication 1995: 3 publications 1996: 3 publications 1997: 6 publications 1998: 3 publications 1999: 5 publications 2000: 2 publications 2001: 3 publications 2002: 3 publications 2003: 9 publications 2004: 4 publications 2005: 6 publications 2006: 1 publication 2007: 4 publications 2008: 6 publications 2009: 6 publications
1971 2009

181 publications in total across all disciplines

View publications per year as a table
D. A. Roland: publications per year, 1971 to 2009
Year Publications
1971 3
1972 7
1973 8
1974 6
1975 9
1976 6
1977 7
1978 4
1979 3
1980 3
1981 3
1982 3
1983 5
1984 4
1985 3
1986 8
1987 2
1988 3
1989 4
1990 7
1991 7
1992 7
1993 4
1994 1
1995 3
1996 3
1997 6
1998 3
1999 5
2000 2
2001 3
2002 3
2003 9
2004 4
2005 6
2006 1
2007 4
2008 6
2009 6
Total 181
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D. A. Roland 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. A. Roland 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, 149–153 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: 153 publications — 58th percentile

58% 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
119–123 109
124–128 93
129–133 89
134–138 95
139–143 92
144–148 80
149–153 75 153
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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D. A. Roland 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. A. Roland 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, 34 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: 34 D-Index — 43rd percentile

43% 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
31 158
32 143
33 137
34 126 34
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

Best Publications

  • Performance of commercial laying hens fed various phosphorus levels, with and without supplemental phytase

    RW Gordon;DA Roland

  • Effect of dietary energy on performance and egg composition of Bovans White and Dekalb White hens during phase I

    G. Wu;M. M. Bryant;R. A. Voitle;D. A. Roland

  • Influence of large doses of ascorbic acid on performance, plasma calcium, bone characteristics, and eggshell quality in broilers and Leghorn hens.

    J. I. Orban;D. A. Roland;K. Cummins;R. T. Lovell

  • Influence of supplemental microbial phytase on first cycle laying hens fed phosphorus-deficient diets from day one of age

    S Punna;DA Roland

  • Influence of Dietary Phosphorus on Performance of Hy-Line W36 Hens

    S. S. Sohail;D. A. Roland

  • The Influence of Various Calcium and Phosphoras Levels on Tibia Strength and Eggshell Quality of Pullets During Peak Production

    T. J. Frost;D. A. Roland

  • Influence of Calcium and Environmental Temperature on Performance of First-Cycle (Phase 1) Commercial Leghorns

    D. A. Roland;M. M. Bryant;H. W. Rabon;J. Self

  • The Ability of Hens to Maintain Calcium Deposition in the Egg Shell and Egg Yolk as the Hen Ages

    D. A. Roland;D. R. Sloan;R. H. Harms

  • Influence of Vitamin D3, 1α-Hydroxyvitamin D3, and 1,25-Dihydroxyvitamin D3 on Eggshell Quality, Tibia Strength, and Various Production Parameters in Commercial Laying Hens

    T. J. Frost;D. A. Roland;G. G. Untawale

  • Influence of Premolt Production on Postmolt Performance with Explanation for Improvement in Egg Production Due to Force Molting

    D. A. Roland;J. Brake

  • Factors Influencing Bone Mineral Content, Density, Breaking Strength, and Ash as Response Criteria for Assessing Bone Quality in Chickens

    J. I. Orban;D. A. Roland;M. M. Bryant;J. C. Williams

  • Influence of Dietary Calcium Level and Particle Size of Calcium Source on In Vivo Calcium Solubilization by Commercial Leghorns

    K. S. Rao;D. A. Roland

  • Influence of Dietary Fat on Economic Returns of Commercial Leghorns

    S. S. Sohail;M. M. Bryant;D. A. Roland

  • In Vivo Limestone Solubilization in Commercial Leghorns: Role of Dietary Calcium Level, Limestone Particle Size, In Vitro Limestone Solubility Rate, and the Calcium Status of the Hen

    K. S. Rao;D. A. Roland

  • Calcium and its Relationship to Excess Feed Consumption, Body Weight, Egg Size, Fat Deposition, Shell Quality, and Fatty Liver Hemorrhagic Syndrome,

    D. A. Roland;M. Farmer;D. Marple

  • Shell quality as influenced by zeolite with high ion-exchange capability.

    Unknown

  • Effect of essential fatty acid deficiency and type of dietary fat supplementation on biotin-deficient chicks.

    David A. Roland;Hardy M. Edwards

  • The Ability of Hens to Regulate Protein Intake When Offered A Choice of Diets Containing Different Levels of Protein

    Unknown

  • The Effects of Various Dietary Phosphorus Levels on the Circadian Patterns of Plasma 1,25-Dihydroxycholecalciferol, Total Calcium, Ionized Calcium, and Phosphorus in Laying Hens

    T. J. Frost;D. A. Roland;D. N. Marple

  • Research note: current methods used in determination and evaluation of tibia strength: a correlation study involving birds fed various levels of cholecalciferol.

    T. J. Frost;D. A. Roland

  • Calcium Metabolism in Broiler Breeder Hens. 2. The Influence of the Time of Feeding on Calcium Status of the Digestive System and Eggshell Quality in Broiler Breeders

    M. Farmer;D. A. Roland;M. K. Eckman

  • Influence of dietary calcium on bone calcium utilization

    M. Farmer;D. A. Roland;A. J. Clark

  • Evidence for Absorption of Silicon and Aluminum by Hens Fed Sodium Zeolite A

    D. A. Roland;H. W. Rabon;K. S. Rao;R. C. Smith

  • Calcium Metabolism in Broiler Breeder Hens: 1. Calcium Status of the Digestive Tract of Broiler Breeders Throughout a 24-Hour Period

    M. Farmer;D. A. Roland;J. Brake;M. K. Eckman

Frequent Co-Authors

J. Brake
J. Brake North Carolina State University

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Related Online Degrees & Career Pathways

Exploring education options related to Animal Science and Veterinary fields can broaden your career potential. For those interested in supporting animal welfare and human relationships, pursuing an mft master's programs online can be a valuable complement, integrating counseling skills with animal-assisted therapies.

If you want to dive deeper into psychology or counseling, a phd in counseling online offers flexible advanced study options, potentially enhancing careers linked to animal behavior and human-animal interaction research.

For those aiming at high-paying opportunities, exploring careers with animals that pay well highlights a range of roles from wildlife management to veterinary specialties, emphasizing the demand for qualified professionals in these areas.

Interestingly, leadership roles like an athletic director require management skills applicable across industries. Understanding how to become an athletic director can inspire those interested in organizational roles within animal science institutions, zoos, or educational programs.

Best Scientists Citing D. A. Roland

S.V. Rama Rao

S.V. Rama Rao

Indian Council of Agricultural Research

Publications: 11

K. Keshavarz

K. Keshavarz

Cornell University

Publications: 11

Carl M Parsons

Carl M Parsons

University of Illinois at Urbana-Champaign

Publications: 10

A.K. Panda

A.K. Panda

Indian Council of Agricultural Research

Publications: 10

Patricia Y. Hester

Patricia Y. Hester

Purdue University West Lafayette

Publications: 8

Velmurugu Ravindran

Velmurugu Ravindran

Massey University

Publications: 8

Craig N. Coon

Craig N. Coon

University of Arkansas at Fayetteville

Publications: 6

Gonzalo González Mateos

Gonzalo González Mateos

Technical University of Madrid

Publications: 6

M.V.L.N. Raju

M.V.L.N. Raju

Indian Council of Agricultural Research

Publications: 6

S. Leeson

S. Leeson

University of Guelph

Publications: 5

Kazim Sahin

Kazim Sahin

Fırat University

Publications: 5

Sylwester Świątkiewicz

Sylwester Świątkiewicz

National Research Institute of Animal Production

Publications: 5

Abolghasem Golian

Abolghasem Golian

Ferdowsi University of Mashhad

Publications: 4

Olayiwola Adeola

Olayiwola Adeola

Purdue University West Lafayette

Publications: 4

M. R. Bedford

M. R. Bedford

AmeriCorps VISTA

Publications: 4

Muhlis Macit

Muhlis Macit

Atatürk University

Publications: 4

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