A. John

1.7k total citations
49 papers, 1.4k citations indexed

About

A. John is a scholar working on Animal Science and Zoology, Agronomy and Crop Science and Plant Science. According to data from OpenAlex, A. John has authored 49 papers receiving a total of 1.4k indexed citations (citations by other indexed papers that have themselves been cited), including 19 papers in Animal Science and Zoology, 19 papers in Agronomy and Crop Science and 8 papers in Plant Science. Recurrent topics in A. John's work include Ruminant Nutrition and Digestive Physiology (19 papers), Animal Nutrition and Physiology (11 papers) and Livestock and Poultry Management (7 papers). A. John is often cited by papers focused on Ruminant Nutrition and Digestive Physiology (19 papers), Animal Nutrition and Physiology (11 papers) and Livestock and Poultry Management (7 papers). A. John collaborates with scholars based in South Africa, Nigeria and United Kingdom. A. John's co-authors include G. C. Waghorn, M. J. Ulyatt, G. Barnett, J.W. Ng`ambi, R. L. Reíd, David O. Norris, T. Gerson, C. S. W. Reid, M. J. Ulyatt and Ulyatt Mj and has published in prestigious journals such as SHILAP Revista de lepidopterología, British Journal Of Nutrition and Journal of the Science of Food and Agriculture.

In The Last Decade

A. John

48 papers receiving 1.2k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
A. John South Africa 22 1.0k 375 289 224 170 49 1.4k
U. Krishnamoorthy India 15 1.3k 1.3× 297 0.8× 361 1.2× 300 1.3× 119 0.7× 43 1.5k
K. A. Beauchemin Canada 17 1.2k 1.2× 401 1.1× 297 1.0× 212 0.9× 163 1.0× 34 1.5k
C. W. Hunt United States 22 1.2k 1.2× 426 1.1× 429 1.5× 313 1.4× 73 0.4× 49 1.6k
P.C. Hoffman United States 19 1.2k 1.2× 357 1.0× 547 1.9× 214 1.0× 97 0.6× 42 1.4k
D.B. Bates United States 15 794 0.8× 317 0.8× 188 0.7× 131 0.6× 140 0.8× 24 999
C. Castríllo Spain 25 1.1k 1.1× 418 1.1× 374 1.3× 149 0.7× 81 0.5× 80 1.5k
R. S. Swingle United States 27 1.1k 1.1× 667 1.8× 511 1.8× 215 1.0× 106 0.6× 73 1.7k
J.A. Guada Spain 25 1.3k 1.3× 469 1.3× 461 1.6× 143 0.6× 84 0.5× 69 1.7k
B. Michalet-Doreau France 26 1.7k 1.7× 402 1.1× 656 2.3× 411 1.8× 171 1.0× 77 2.0k
D. Fritz Germany 6 1.3k 1.3× 340 0.9× 196 0.7× 390 1.7× 156 0.9× 13 1.5k

Countries citing papers authored by A. John

Since Specialization
Citations

This map shows the geographic impact of A. John's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by A. John with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites A. John more than expected).

Fields of papers citing papers by A. John

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by A. John. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by A. John. The network helps show where A. John may publish in the future.

Co-authorship network of co-authors of A. John

This figure shows the co-authorship network connecting the top 25 collaborators of A. John. A scholar is included among the top collaborators of A. John based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with A. John. A. John is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
3.
John, A., J.W. Ng`ambi, & Ejikeme Felix Mbajiorgu. (2020). AQUEOUS EXTRACT OF MORINGA (MORINGA OLEIFERA) LEAF (AEMOL) ON THE GROWTH, SENSORY AND HISTOLOGY PARAMETERS OF BROILER CHICKENS. Applied Ecology and Environmental Research. 18(5). 6753–6764. 6 indexed citations
4.
John, A., et al.. (2014). Carcass yield, organoleptic and serum biochemistry of broiler chickens fed activated charcoal. 2(5). 83–87. 4 indexed citations
5.
Norris, David O., J.W. Ng`ambi, Monnye Mabelebele, A. John, & K. Benyi. (2014). Genetic selection for docility: a review.. 24(2). 374–379. 14 indexed citations
6.
Ng`ambi, J.W., A. John, & David O. Norris. (2013). Role of goats in food security, poverty alleviation and prosperity with special reference to Sub-Saharan Africa: a review.. Indian Journal of Animal Research. 47(1). 1–9. 21 indexed citations
7.
John, A., et al.. (2013). Effects of urea-treated fibrous diets on nutrient intake, digestibility, performance and haematological parameters of Yankasa rams. Tropical Animal Health and Production. 45(6). 1349–1355. 3 indexed citations
8.
John, A., et al.. (2012). Effects of dried baker's yeast inclusion in rice husk-based diets on performance and egg quality parameters in laying hens.. Indian Journal of Animal Research. 46(1). 56–60. 3 indexed citations
9.
Mbajiorgu, C. A., J.W. Ng`ambi, David O. Norris, & A. John. (2011). Effect of Dietary Lysine to Energy Ratio on Performance of Unsexed Indigenous Venda Chickens. Asian Journal of Animal and Veterinary Advances. 6(5). 517–524. 8 indexed citations
10.
Brookes, I.M., et al.. (1994). Effects of leaf shear breaking load on the feeding value of perennial ryegrass (Lolium perenne) for sheep. The Journal of Agricultural Science. 123(1). 129–136. 26 indexed citations
11.
John, A., et al.. (1989). Effects of selection for shear strength on structure and rumen digestion of perennial ryegrass. Proceedings of the New Zealand Society of Animal Production. 49. 225–228. 11 indexed citations
12.
John, A., et al.. (1989). Effects of selection for shear strength on the voluntary intake and digestion of perennial ryegrass fed to sheep. Proceedings of the New Zealand Society of Animal Production. 49. 221–224. 17 indexed citations
13.
John, A., et al.. (1988). Physical breakdown of forages during rumination. Proceedings of the New Zealand Society of Animal Production. 48. 247–248. 5 indexed citations
14.
McSweeney, Christopher S., PM Kennedy, & A. John. (1988). Effect of ingestion of hydrolysable tannins in Terminalia oblongata on digestion in sheep fed Stylosanthes hamata. Australian Journal of Agricultural Research. 39(2). 235–244. 36 indexed citations
15.
John, A. & Ulyatt Mj. (1987). Importance of dry matter content to voluntary intake of fresh grass forages. Proceedings of the New Zealand Society of Animal Production. 47. 13–16. 42 indexed citations
16.
Gc, Waghorn, et al.. (1987). Nutritive value of Lotus corniculatus L. containing low and medium concentrations of condensed tannins for sheep. Proceedings of the New Zealand Society of Animal Production. 47. 25–30. 51 indexed citations
17.
Gerson, T., et al.. (1985). The effects of dietary starch and fibre on thein vitrorates of lipolysis and hydrogenation by sheep rumen digesta. The Journal of Agricultural Science. 105(1). 27–30. 58 indexed citations
18.
John, A. & Ulyatt Mj. (1979). Phosphatidyl choline as a marker of duodenal flow of rumen protozoa in sheep.. Munich Personal RePEc Archive (Ludwig Maximilian University of Munich). 38(3). 144A–144A. 3 indexed citations
19.
John, A., G. Barnett, & R. L. Reíd. (1957). Studies on the production of volatile fatty acids from grass by rumen liquor in an artificial rumen: I. The volatile acid production from fresh grass. The Journal of Agricultural Science. 48(3). 315–321. 144 indexed citations
20.
John, A., G. Barnett, & D. K. Smith. (1955). The movement of higher fatty acids under electrophoresis on filter‐paper strips. Journal of the Science of Food and Agriculture. 6(1). 53–57. 2 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

Explore authors with similar magnitude of impact

Rankless by CCL
2026