John T. O’Donovan

6.3k citations

179 papers · 5.3k · h-index 41

Impact in

Agronomy and Crop Science top 0.1%
- Agronomic Practices and Intercropping Systems
- Crop Yield and Soil Fertility
Soil Science top 0.5%
- Soil Carbon and Nitrogen Dynamics

Papers in

Plant Science 142
- Weed Control and Herbicide Applications 70
- Legume Nitrogen Fixing Symbiosis 29
- Wheat and Barley Genetics and Pathology 19
Agronomy and Crop Science 95
- Agronomic Practices and Intercropping Systems 76
- Crop Yield and Soil Fertility 21

Co-authors: K. Neil Harker (108 shared papers)George W. Clayton (71 shared papers)Robert E. Blackshaw (65 shared papers)Newton Z. Lupwayi (34 shared papers)T. Kelly Turkington (42 shared papers)P. A. O’SULLIVAN (8 shared papers)Eric N. Johnson (39 shared papers)Yantai Gan (18 shared papers)
Journals: Agronomy Journal (22 papers)Weed Science (22 papers)Weed Technology (17 papers)Canadian Journal of Soil Science (7 papers)Canadian Journal of Plant Science (50 papers)
Partner nations: Canada United States Ireland

In The Last Decade

John T. O’Donovan

174 papers receiving 4.8k citations

Peers

Countries citing papers authored by John T. O’Donovan

Since Specialization

Citations

This map shows the geographic impact of John T. O’Donovan'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 T. O’Donovan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites John T. O’Donovan more than expected).

Fields of papers citing papers by John T. O’Donovan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by John T. O’Donovan. 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 T. O’Donovan. The network helps show where John T. O’Donovan may publish in the future.

Co-authors

The 25 scholars most cited alongside John T. O’Donovan, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with John T. O’Donovan Line = papers co-authored together John T. O’Donovan links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

Showing the 20 most-cited of 179 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Recent Weed Control, Weed Management, and Integrated Weed Management Weed Technology ·K. Neil Harker, John T. O’Donovan	2013	273
2	The use of Biologically Realistic Equations to Describe the Effects of Weed Density and Relative Time of Emergence on Crop Yield Weed Science ·Roger Cousens, P. Brain, John T. O’Donovan, P. A. O’SULLIVAN	1987	201
3	Influence of the Relative Time of Emergence of Wild Oat (Avena fatua) on Yield Loss of Barley (Hordeum vulgare) and Wheat (Triticum aestivum) Weed Science ·John T. O’Donovan, Elyn Remy, Pat O'Sullivan, Don A. Dew, Arvind Sharma	1985	201
4	Diversifying crop rotations with pulses enhances system productivity Scientific Reports ·Yantai Gan, Chantal Hamel, John T. O’Donovan, H. Cutforth, R.P. Zentner, Con A. Campbell, Yining Niu, Lee Poppy	2015	200
5	Seeding rate, herbicide timing and competitive hybrids contribute to integrated weed management in canola (Brassica napus) Canadian Journal of Plant Science ·K. Neil Harker, George W. Clayton, Robert E. Blackshaw, John T. O’Donovan, F. Craig Stevenson	2003	108
6	Nitrogen release during decomposition of crop residues under conventional and zero tillage Canadian Journal of Soil Science ·Newton Z. Lupwayi, George W. Clayton, John T. O’Donovan, K. Neil Harker, T. K. Turkington, Y. K. Soon	2006	103
7	Legumes can reduce economic optimum nitrogen rates and increase yields in a wheat–canola cropping sequence in western Canada Field Crops Research ·Mervin St. Luce, Cynthia A. Grant, Bernie J. Zebarth, Noura Ziadi, John T. O’Donovan, Robert E. Blackshaw, K. Neil Harker, Eric N. Johnson, Yantai Gan, G. P. Lafond, William E. May, Mohammad Khakbazan, Elwin G. Smith	2015	99
8	INFLUENCE OF NON-IONIC SURFACTANTS, AMMONIUM SULPHATE, WATER QUALITY AND SPRAY VOLUME ON THE PHYTOTOXICITY OF GLYPHOSATE Canadian Journal of Plant Science ·P. A. O’SULLIVAN, John T. O’Donovan, W. M. Hamman	1981	96
9	Decomposition of crop residues under conventional and zero tillage Canadian Journal of Soil Science ·Newton Z. Lupwayi, George W. Clayton, John T. O’Donovan, K. Neil Harker, T. K. Turkington, W. A. Rice	2004	95
10	Reduced herbicide doses in field crops: A review Weed Biology and Management ·Robert E. Blackshaw, John T. O’Donovan, K. Neil Harker, George W. Clayton, R. N. Stougaard	2006	94
11	Ongoing Development of Integrated Weed Management Systems on the Canadian Prairies Weed Science ·Robert E. Blackshaw, K. Neil Harker, John T. O’Donovan, Hugh J. Beckie, Elwin G. Smith	2008	79
12	The Weed‐Competitive Ability of Canada Western Red Spring Wheat Cultivars Grown under Organic Management Crop Science ·H. Mason, Alireza Navabi, B. Frick, John T. O’Donovan, Dean Spaner	2007	78
13	Soil microbial biomass, functional diversity and enzyme activity in glyphosate-resistant wheat–canola rotations under low-disturbance direct seeding and conventional tillage Soil Biology and Biochemistry ·Newton Z. Lupwayi, K.G. Hanson, K. Neil Harker, George W. Clayton, Robert E. Blackshaw, John T. O’Donovan, Eric N. Johnson, Yantai Gan, R. B. Irvine, M. Monreal	2007	76
14	Seeding Rate, Nitrogen Rate, and Cultivar Effects on Malting Barley Production Agronomy Journal ·John T. O’Donovan, T. Kelly Turkington, M. J. Edney, George W. Clayton, Ross H. McKenzie, P. E. Juskiw, G. P. Lafond, Cynthia A. Grant, S.A. Brandt, K. Neil Harker, Eric N. Johnson, William E. May	2011	74
15	Forage Potential of Intercropping Berseem Clover with Barley, Oat, or Triticale Agronomy Journal ·Shirley Ross, J. R. King, John T. O’Donovan, Dean Spaner	2004	72
16	Rotational Effects of Legumes and Non‐Legumes on Hybrid Canola and Malting Barley Agronomy Journal ·John T. O’Donovan, Cynthia A. Grant, Robert E. Blackshaw, K. Neil Harker, Eric N. Johnson, Yantai Gan, G. P. Lafond, William E. May, T. Kelly Turkington, Newton Z. Lupwayi, F. Craig Stevenson, Debra L. McLaren, Mohammad Khakbazan, Elwin G. Smith	2014	71
17	Barley seeding rate influences the effects of variable herbicide rates on wild oat Weed Science ·John T. O’Donovan, K. Neil Harker, George W. Clayton, J. C. Newman, Darren K. Robinson, Linda M. Hall	2001	67
18	Phosphorus release during decomposition of crop residues under conventional and zero tillage Soil and Tillage Research ·Newton Z. Lupwayi, George W. Clayton, John T. O’Donovan, K. Neil Harker, T. Kelly Turkington, Y. K. Soon	2007	66
19	Integrated approaches to managing weeds in spring-sown crops in western Canada Crop Protection ·John T. O’Donovan, Robert E. Blackshaw, K. Neil Harker, George W. Clayton, J. R. Moyer, Lloyd M. Dosdall, Denise Maurice, T. Kelly Turkington	2006	65
20	Soil microbial biomass and diversity after herbicide application Canadian Journal of Plant Science ·Newton Z. Lupwayi, K. Neil Harker, George W. Clayton, T. Kelly Turkington, W. A. Rice, John T. O’Donovan	2004	64

About John T. O’Donovan

John T. O’Donovan is a scholar working on Plant Science, Agronomy and Crop Science, Soil Science, Molecular Biology and Pollution, having authored 179 papers that have together received 5.3k indexed citations. Recurring topics across this work include Agronomic Practices and Intercropping Systems (76 papers), Weed Control and Herbicide Applications (70 papers), Soil Carbon and Nitrogen Dynamics (38 papers), Nitrogen and Sulfur Effects on Brassica (34 papers), Legume Nitrogen Fixing Symbiosis (29 papers), Pesticide and Herbicide Environmental Studies (24 papers), Crop Yield and Soil Fertility (21 papers) and Wheat and Barley Genetics and Pathology (19 papers). The work is most often cited by research in Agronomy and Crop Science (2.3k citations), Soil Science (1.3k citations), Plant Science (4.0k citations), Pollution (645 citations) and Forestry (182 citations). John T. O’Donovan has collaborated with scholars based in Canada, United States and Ireland. Frequent co-authors include K. Neil Harker, George W. Clayton, Robert E. Blackshaw, Newton Z. Lupwayi, T. Kelly Turkington, P. A. O’SULLIVAN, Eric N. Johnson, Yantai Gan, Dean Spaner and Elwin G. Smith. Their work appears in journals such as Agronomy Journal, Weed Science, Weed Technology, Canadian Journal of Soil Science and Canadian Journal of Plant Science.

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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John T. O’Donovan

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