John Koolaard

1.5k total citations
47 papers, 1.1k citations indexed

About

John Koolaard is a scholar working on Agronomy and Crop Science, Plant Science and Ecology. According to data from OpenAlex, John Koolaard has authored 47 papers receiving a total of 1.1k indexed citations (citations by other indexed papers that have themselves been cited), including 17 papers in Agronomy and Crop Science, 14 papers in Plant Science and 9 papers in Ecology. Recurrent topics in John Koolaard's work include Ruminant Nutrition and Digestive Physiology (15 papers), Botanical Research and Chemistry (5 papers) and Plant and fungal interactions (5 papers). John Koolaard is often cited by papers focused on Ruminant Nutrition and Digestive Physiology (15 papers), Botanical Research and Chemistry (5 papers) and Plant and fungal interactions (5 papers). John Koolaard collaborates with scholars based in New Zealand, United Kingdom and Australia. John Koolaard's co-authors include Stefan Muetzel, J.L. Burke, G. C. Waghorn, K.J. Hammond, C.S. Pinares-Patiño, Richard D. Johnson, Christine R. Voisey, Sandra Kittelmann, Graham E. Naylor and Peter H. Janssen and has published in prestigious journals such as PLoS ONE, Journal of Experimental Botany and Nutrients.

In The Last Decade

John Koolaard

47 papers receiving 1.1k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
John Koolaard New Zealand 19 452 301 280 190 168 47 1.1k
Xuezhao Sun New Zealand 21 923 2.0× 95 0.3× 150 0.5× 223 1.2× 156 0.9× 70 1.2k
Glen E. Aiken United States 23 696 1.5× 893 3.0× 181 0.6× 402 2.1× 134 0.8× 108 1.7k
Henry Greathead United Kingdom 11 486 1.1× 117 0.4× 186 0.7× 112 0.6× 161 1.0× 22 999
Juan E Carulla Colombia 13 1.1k 2.4× 146 0.5× 176 0.6× 164 0.9× 132 0.8× 70 1.3k
G. M. Hill United States 23 1.0k 2.3× 174 0.6× 317 1.1× 95 0.5× 207 1.2× 71 1.8k
Shiqie Bai China 18 327 0.7× 189 0.6× 531 1.9× 303 1.6× 51 0.3× 89 1.1k
André Soares de Oliveira Brazil 20 1.2k 2.6× 128 0.4× 365 1.3× 153 0.8× 137 0.8× 94 1.6k
John Andrae United States 18 496 1.1× 250 0.8× 81 0.3× 137 0.7× 79 0.5× 58 950
M. Wang China 18 808 1.8× 90 0.3× 150 0.5× 172 0.9× 165 1.0× 35 1.2k
Ives Cláudio da Silva Bueno Brazil 20 778 1.7× 87 0.3× 189 0.7× 91 0.5× 101 0.6× 77 1.1k

Countries citing papers authored by John Koolaard

Since Specialization
Citations

This map shows the geographic impact of John Koolaard'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 John Koolaard with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites John Koolaard more than expected).

Fields of papers citing papers by John Koolaard

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by John Koolaard. 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 John Koolaard. The network helps show where John Koolaard may publish in the future.

Co-authorship network of co-authors of John Koolaard

This figure shows the co-authorship network connecting the top 25 collaborators of John Koolaard. A scholar is included among the top collaborators of John Koolaard 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 John Koolaard. John Koolaard 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
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Faville, Marty J., Wei Zhang, M. Philip Rolston, et al.. (2018). Seed Transmission of Epichloë Endophytes in Lolium perenne Is Heavily Influenced by Host Genetics. Frontiers in Plant Science. 9. 1580–1580. 54 indexed citations
3.
Betteridge, K., Kensuke Kawamura, D. A. Costall, et al.. (2017). Intensive Livestock Farming on New Zealand Hill Country Farms Creates Critical Source Areas of Potential Pollution. 77–87. 1 indexed citations
4.
Sun, Xuezhao, et al.. (2016). Sheep numbers required for dry matter digestibility evaluations when fed fresh perennial ryegrass or forage rape. Animal nutrition. 3(1). 61–66. 6 indexed citations
5.
Voisey, Christine R., Linda J. Johnson, Gregory T. Bryan, et al.. (2016). cAMP Signaling Regulates Synchronised Growth of Symbiotic Epichloë Fungi with the Host Grass Lolium perenne. Frontiers in Plant Science. 7. 1546–1546. 16 indexed citations
6.
Faville, Marty J., Lyn Briggs, Mingshu Cao, et al.. (2015). A QTL analysis of host plant effects on fungal endophyte biomass and alkaloid expression in perennial ryegrass. Molecular Breeding. 35(8). 161–161. 23 indexed citations
7.
8.
Bond, J. J., A. Pernthaner, Sarah M. Rosanowski, et al.. (2014). Efferent intestinal lymph protein responses in nematode-resistant, -resilient and -susceptible lambs under challenge with Trichostrongylus colubriformis. Journal of Proteomics. 109. 356–367. 3 indexed citations
9.
McCoard, S. A., et al.. (2014). The effect of maternal arginine supplementation on the development of the thermogenic program in the ovine fetus. Animal Production Science. 54(10). 1843–1847. 13 indexed citations
10.
Hammond, K.J., D. Pacheco, J.L. Burke, et al.. (2014). The effects of fresh forages and feed intake level on digesta kinetics and enteric methane emissions from sheep. Animal Feed Science and Technology. 193. 32–43. 57 indexed citations
11.
Hatier, Jean‐Hugues B., et al.. (2014). Plant vigour at establishment and following defoliation are both associated with responses to drought in perennial ryegrass ( Lolium perenne L.). Journal of Experimental Botany. 65(20). 5823–5834. 19 indexed citations
12.
McCoard, S. A., et al.. (2013). Parenteral administration of twin-bearing ewes with L-arginine enhances the birth weight and brown fat stores in sheep. SpringerPlus. 2(1). 684–684. 47 indexed citations
13.
Pinares-Patiño, C.S., José Ignacio Gere, María Paula Juliarena, et al.. (2012). Extending the Collection Duration of Breath Samples for Enteric Methane Emission Estimation Using the SF6 Tracer Technique. Animals. 2(2). 275–287. 19 indexed citations
14.
Martin, Cécile, John Koolaard, Yvanne Rochette, et al.. (2011). Effect of release rate of the SF6 tracer on methane emission estimates based on ruminal and breath gas samples. animal. 6(3). 518–525. 6 indexed citations
15.
Heath, D.D. & John Koolaard. (2011). Serological monitoring of protection of sheep against Echinococcus granulosus induced by the EG95 vaccine. Parasite Immunology. 34(1). 40–44. 20 indexed citations
16.
Hurst, Paul L., Virginia K. Corrigan, & John Koolaard. (2006). Genetic analysis of sweetness and textural attributes in winter squash ( Cucurbita maxima ). New Zealand Journal of Crop and Horticultural Science. 34(4). 359–367. 4 indexed citations
17.
Wright, P.J., R.A. Fullerton, & John Koolaard. (2006). Fungicide control of head smut (Sporisorium reilianum) of sweetcorn (Zea mays). New Zealand Journal of Crop and Horticultural Science. 34(1). 23–26. 5 indexed citations
18.
James, K. A. C., et al.. (2005). The effects of cultivar and heat treatment on protein quality and trypsin inhibitor content of New Zealand field peas. New Zealand Journal of Agricultural Research. 48(1). 117–124. 3 indexed citations
19.
James, K. A. C., Peter J. Moore, James A. Mills, et al.. (2004). The nutritional value of cocksfoot (Dactylis glomerata L.), midribbed snow‐tussock (Chionochloa pallens Zotov), and red tussock (Chionochloa rubra Zotov) for the takahe (Porphyrio hochstetteri Meyer). Journal of the Royal Society of New Zealand. 34(4). 333–345. 2 indexed citations
20.
Savage, Geoffrey P., et al.. (2001). Search for predictors of cooking quality of marrowfat pea (Pisum sativum L) cultivars. Journal of the Science of Food and Agriculture. 81(8). 701–705. 4 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.

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