Top 100 Scientists

World Top 100 Scientists 2025

Top 100 scientists can be ranked globally or specific to the following regions including Africa, Asia, Europe, North America, Latin America, Oceania, Arab League, ASEAN, EECA, and BRICS based on total H-index scores without any breakdown by subject areas. Top 100 rankings in the world, in a continent, or a region include standardized subjects areas of Agriculture & Forestry, Arts, Design and Architecture, Business & Management, Economics & Econometrics, Education, Engineering & Technology, History, Philosophy, Theology, Law/Law and Legal Studies, Medical and Health Sciences, Natural Sciences, Social Sciences, Art and Humanities Rankings and Social Sciences and Humanities Rankings BETA VERSION. Subject field ranking in world, region, country and university is beta version since subject field "others" (873,898 scientists profile whose branch cannot be determined, not yet edited or determined) is excluded, so the ranking will change as the others fields are edited. Please note that. Subjects indicated as “ * others ” will not be included in the ranking by regions and subjects.

* Rankings
Ranking Based On Selection: 3
Karl G. Richards
greenhouse gas emissions
nitrous oxide
agricultural sustainability
water quality
soil science
Metrics
H-Index
i10 Index
Citation
50
159
7,774
* Rankings
Ranking Based On Selection: 4
Karl Richards
agriculture
environment
water quality
greenhouse gas emissions
N2O
Metrics
H-Index
i10 Index
Citation
49
155
7,642
* Rankings
Ranking Based On Selection: 5
Gary Lanigan
Plant Science
Climate Change
Greenhouse Gases
Soil Science
Atmospheric Science
Metrics
H-Index
i10 Index
Citation
47
112
7,870
* Rankings
Ranking Based On Selection: 7
Mohammed Gagaoua
Meat science
Animal production
Meat Quality
Muscle biology
Meat
Metrics
H-Index
i10 Index
Citation
44
109
6,798
* Rankings
Ranking Based On Selection: 10
David P. Wall
Agriculture
Soil Science
Nutrient Cycling
Carbon Sequestration
Environmental Science
Metrics
H-Index
i10 Index
Citation
35
60
3,217

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* Rankings
Ranking Based On Selection: 12
Farhad Garavand
Food Processing
Dairy Technology
Food Packaging
Protein Functionality
Metrics
H-Index
i10 Index
Citation
30
44
3,182
* Rankings
Ranking Based On Selection: 17
Karen Daly
Soil science
water quality
environmental modelling
nutrient transfer
spectroscopy
Metrics
H-Index
i10 Index
Citation
24
52
2,419
* Rankings
Ranking Based On Selection: 19
David Meredith
Farm Safety
Farmer Health and Wellbeing
Health Geography
Rural Development
Agriculture Policy
Metrics
H-Index
i10 Index
Citation
21
41
1,769
* Rankings
Ranking Based On Selection: 20
Donal M O'Brien
Agricultural Systems
Sustainability
Carbon Farming
Greenhouse Gases
Carbon Sequestration
Metrics
H-Index
i10 Index
Citation
20
21
1,918
* Rankings
Ranking Based On Selection: 21
Reamonn Fealy
Spatial Analysis
agriculture
environment
policy analysis
ICT
Metrics
H-Index
i10 Index
Citation
20
32
1,606
* Rankings
Ranking Based On Selection: 23
Junfu Ji
Dairy powder
granulation
structural properties and functionalites of food powders
Metrics
H-Index
i10 Index
Citation
18
30
1,295
* Rankings
Ranking Based On Selection: 24
Apeh Omede
Animal Nutrition
Gut Health and Physiology
Microbiome
Feed Enzymes and Additives
Metrics
H-Index
i10 Index
Citation
18
28
1,036
* Rankings
Ranking Based On Selection: 25
Stephen Moore
Research to Improve Dairy Cow Fertility
Animal Reproduction
Dairy
Microbiome
Metrics
H-Index
i10 Index
Citation
16
20
1,292
* Rankings
Ranking Based On Selection: 26
Jason Loughrey
Agricultural Economics
Land Markets
Risk Analysis
Income Distribution
Metrics
H-Index
i10 Index
Citation
15
22
685
* Rankings
Ranking Based On Selection: 28
Zoia Arshad Awan
Plant production
plant protection
environmental sustainability
Metrics
H-Index
i10 Index
Citation
14
16
512
* Rankings
Ranking Based On Selection: 29
Bhavya Ml
Food Science and Technology
Novel non-thermal technologies
Food Microbiology
Biopesticides
Flavour analysis
Metrics
H-Index
i10 Index
Citation
13
14
665
* Rankings
Ranking Based On Selection: 30
William Burchill
Agriculture
Ammonia emissions
Biological N fixation
Nitrous oxide
Metrics
H-Index
i10 Index
Citation
11
12
546
* Rankings
Ranking Based On Selection: 33
Ian Short
silviculture
forestry
agroforestry
broadleaf
continuous cover forestry
Metrics
H-Index
i10 Index
Citation
10
11
640
* Rankings
Ranking Based On Selection: 38
Frauke Fedderwitz
plant-animal interaction
plant protection
entomology
animal behaviour
Metrics
H-Index
i10 Index
Citation
8
7
172
* Rankings
Ranking Based On Selection: 40
Darren J Murphy
Agricultural Engineering
Precision Agriculture
Machine Learning
Sustainability
Nitrates Leaching
Metrics
H-Index
i10 Index
Citation
7
6
240
* Rankings
Ranking Based On Selection: 43
Vajihe Shahrokh
soil science
geospatial analysis
greenhouse gas emissions
soil carbon sequestration
Metrics
H-Index
i10 Index
Citation
6
5
173
* Rankings
Ranking Based On Selection: 45
Aoife M Duff
Soil and environmental microbiology
Microbial ecology
Nutrient cycling
Enteric Pathogens
Plant-soil-microbial interactions
Metrics
H-Index
i10 Index
Citation
6
5
144
* Rankings
Ranking Based On Selection: 48
Geraldine Murphy
Environmental Policy
Environmental Economics
Rural Development
Discrete Choice Modelling
Agricultural Economics
Metrics
H-Index
i10 Index
Citation
6
5
275
* Rankings
Ranking Based On Selection: 49
Lungelo Cele
Agricultural Economics
Cooperative Economics
Rural Economic Development
Agricultural Development
Metrics
H-Index
i10 Index
Citation
5
4
97
Rankings
Ranking Based On Selection: 1
Donagh Berry
Metrics
H-Index
i10 Index
Citation Counts
80
318
24,724
Rankings
Ranking Based On Selection: 2
Laurence Shalloo
Metrics
H-Index
i10 Index
Citation Counts
57
153
9,982
Modelling
Precision livestock farming and sensors
Rankings
Ranking Based On Selection: 3
Karl G. Richards
Metrics
H-Index
i10 Index
Citation Counts
50
159
7,774
greenhouse gas emissions
nitrous oxide
agricultural sustainability
water quality
soil science
Rankings
Ranking Based On Selection: 4
Karl Richards
Metrics
H-Index
i10 Index
Citation Counts
49
155
7,642
agriculture
environment
water quality
greenhouse gas emissions
N2O
Rankings
Ranking Based On Selection: 5
Gary Lanigan
Metrics
H-Index
i10 Index
Citation Counts
47
112
7,870
Plant Science
Climate Change
Greenhouse Gases
Soil Science
Atmospheric Science
Rankings
Ranking Based On Selection: 6
Laura Boyle
Metrics
H-Index
i10 Index
Citation Counts
45
108
5,393
Rankings
Ranking Based On Selection: 7
Mohammed Gagaoua
Metrics
H-Index
i10 Index
Citation Counts
44
109
6,798
Meat science
Animal production
Meat Quality
Muscle biology
Meat
Rankings
Ranking Based On Selection: 8
Donal J O'Callaghan
Metrics
H-Index
i10 Index
Citation Counts
39
72
3,501
dairy technology
cheese
spray drying
physics
Rankings
Ranking Based On Selection: 9
Emer Kennedy
Metrics
H-Index
i10 Index
Citation Counts
36
78
4,220
agriculture
grazing
dairy cows
heifers
calves
Rankings
Ranking Based On Selection: 10
David P. Wall
Metrics
H-Index
i10 Index
Citation Counts
35
60
3,217
Agriculture
Soil Science
Nutrient Cycling
Carbon Sequestration
Environmental Science

Enroll all your faculty members with discounted institutional membership to showcase your institution's academic strength to the world in the best way possible – join now and achieve results fast! 

Rankings
Ranking Based On Selection: 11
John Spink
Metrics
H-Index
i10 Index
Citation Counts
35
72
5,554
Rankings
Ranking Based On Selection: 12
Farhad Garavand
Metrics
H-Index
i10 Index
Citation Counts
30
44
3,182
Food Processing
Dairy Technology
Food Packaging
Protein Functionality
Rankings
Ranking Based On Selection: 13
Ewen Mullins
Metrics
H-Index
i10 Index
Citation Counts
30
67
3,836
Crop biotechnology
genetic engineering
disease resistance
Rankings
Ranking Based On Selection: 14
Noel Mccarthy
Metrics
H-Index
i10 Index
Citation Counts
26
49
1,860
Rankings
Ranking Based On Selection: 15
Keelin O'Driscoll
Metrics
H-Index
i10 Index
Citation Counts
25
53
1,638
Rankings
Ranking Based On Selection: 16
Nóirín Mchugh
Metrics
H-Index
i10 Index
Citation Counts
24
49
1,916
Rankings
Ranking Based On Selection: 17
Karen Daly
Metrics
H-Index
i10 Index
Citation Counts
24
52
2,419
Soil science
water quality
environmental modelling
nutrient transfer
spectroscopy
Rankings
Ranking Based On Selection: 18
Patrick J. Forrestal
Metrics
H-Index
i10 Index
Citation Counts
23
40
1,861
Rankings
Ranking Based On Selection: 19
David Meredith
Metrics
H-Index
i10 Index
Citation Counts
21
41
1,769
Farm Safety
Farmer Health and Wellbeing
Health Geography
Rural Development
Agriculture Policy
Rankings
Ranking Based On Selection: 20
Donal M O'Brien
Metrics
H-Index
i10 Index
Citation Counts
20
21
1,918
Agricultural Systems
Sustainability
Carbon Farming
Greenhouse Gases
Carbon Sequestration
Rankings
Ranking Based On Selection: 21
Reamonn Fealy
Metrics
H-Index
i10 Index
Citation Counts
20
32
1,606
Spatial Analysis
agriculture
environment
policy analysis
ICT
Rankings
Ranking Based On Selection: 22
Niall J Farrelly
Metrics
H-Index
i10 Index
Citation Counts
19
31
1,437
Silviculture
Forestry
Ecology
Environmental Analysis
Rankings
Ranking Based On Selection: 23
Junfu Ji
Metrics
H-Index
i10 Index
Citation Counts
18
30
1,295
Dairy powder
granulation
structural properties and functionalites of food powders
Rankings
Ranking Based On Selection: 24
Apeh Omede
Metrics
H-Index
i10 Index
Citation Counts
18
28
1,036
Animal Nutrition
Gut Health and Physiology
Microbiome
Feed Enzymes and Additives
Rankings
Ranking Based On Selection: 25
Stephen Moore
Metrics
H-Index
i10 Index
Citation Counts
16
20
1,292
Research to Improve Dairy Cow Fertility
Animal Reproduction
Dairy
Microbiome
Rankings
Ranking Based On Selection: 26
Jason Loughrey
Metrics
H-Index
i10 Index
Citation Counts
15
22
685
Agricultural Economics
Land Markets
Risk Analysis
Income Distribution
Rankings
Ranking Based On Selection: 27
John Mcnamara
Metrics
H-Index
i10 Index
Citation Counts
14
20
1,078
agricultural occupational health and safety
Rankings
Ranking Based On Selection: 28
Zoia Arshad Awan
Metrics
H-Index
i10 Index
Citation Counts
14
16
512
Plant production
plant protection
environmental sustainability
Rankings
Ranking Based On Selection: 29
Bhavya Ml
Metrics
H-Index
i10 Index
Citation Counts
13
14
665
Food Science and Technology
Novel non-thermal technologies
Food Microbiology
Biopesticides
Flavour analysis
Rankings
Ranking Based On Selection: 30
William Burchill
Metrics
H-Index
i10 Index
Citation Counts
11
12
546
Agriculture
Ammonia emissions
Biological N fixation
Nitrous oxide
Rankings
Ranking Based On Selection: 32
Anaerobic digestion
Biomethane
Biohydrogen
Agri-industrial waste and wastewater
Rankings
Ranking Based On Selection: 33
Ian Short
Metrics
H-Index
i10 Index
Citation Counts
10
11
640
silviculture
forestry
agroforestry
broadleaf
continuous cover forestry
Rankings
Ranking Based On Selection: 34
Louise Mcnamara
Metrics
H-Index
i10 Index
Citation Counts
9
8
301
Entomology
Biocontrol
Resistance
Integrated Pest Management
Rankings
Ranking Based On Selection: 35
Paul E Smith
Metrics
H-Index
i10 Index
Citation Counts
8
7
236
rumen microbiology
methane
ruminant livestock
animal science
Rankings
Ranking Based On Selection: 36
Rabisa Zia
Metrics
H-Index
i10 Index
Citation Counts
8
6
721
Rankings
Ranking Based On Selection: 37
Samir Ranjitkar
Metrics
H-Index
i10 Index
Citation Counts
8
8
535
Poultry
Nutrition
Gut health
Pig production
Microbiota
Rankings
Ranking Based On Selection: 38
Frauke Fedderwitz
Metrics
H-Index
i10 Index
Citation Counts
8
7
172
plant-animal interaction
plant protection
entomology
animal behaviour
Rankings
Ranking Based On Selection: 39
Qi Tang
Metrics
H-Index
i10 Index
Citation Counts
7
7
311
Plant protein
Dairy protein
Gel
Digestion
Flavor
Rankings
Ranking Based On Selection: 40
Darren J Murphy
Metrics
H-Index
i10 Index
Citation Counts
7
6
240
Agricultural Engineering
Precision Agriculture
Machine Learning
Sustainability
Nitrates Leaching
Rankings
Ranking Based On Selection: 41
Fiona Hutton
Metrics
H-Index
i10 Index
Citation Counts
7
6
119
Rankings
Ranking Based On Selection: 42
Michele Della Bartola
Metrics
H-Index
i10 Index
Citation Counts
6
5
266
plant virology
plant pathology
molecular biology
Rankings
Ranking Based On Selection: 43
Vajihe Shahrokh
Metrics
H-Index
i10 Index
Citation Counts
6
5
173
soil science
geospatial analysis
greenhouse gas emissions
soil carbon sequestration
Rankings
Ranking Based On Selection: 44
Maria Frizzarin
Metrics
H-Index
i10 Index
Citation Counts
6
5
146
Rankings
Ranking Based On Selection: 45
Aoife M Duff
Metrics
H-Index
i10 Index
Citation Counts
6
5
144
Soil and environmental microbiology
Microbial ecology
Nutrient cycling
Enteric Pathogens
Plant-soil-microbial interactions
Rankings
Ranking Based On Selection: 47
David Kelly
Metrics
H-Index
i10 Index
Citation Counts
6
4
100
Rankings
Ranking Based On Selection: 48
Geraldine Murphy
Metrics
H-Index
i10 Index
Citation Counts
6
5
275
Environmental Policy
Environmental Economics
Rural Development
Discrete Choice Modelling
Agricultural Economics
Rankings
Ranking Based On Selection: 49
Lungelo Cele
Metrics
H-Index
i10 Index
Citation Counts
5
4
97
Agricultural Economics
Cooperative Economics
Rural Economic Development
Agricultural Development
Rankings
Ranking Based On Selection: 50
Animal Science
Animal nutrition
Near Infrared Reflectance Spectroscopy
Spectroscopy
Rankings
Ranking Based On Selection: 52
Diana-Elena Bucur
Metrics
H-Index
i10 Index
Citation Counts
3
2
36
Rankings
Ranking Based On Selection: 53
Phoebe Hartnett
Metrics
H-Index
i10 Index
Citation Counts
3
2
34
Animal health
Animal welfare
Animal behaviour
Dairy
Milk quality.
Rankings
Ranking Based On Selection: 54
Atikur Rahman
Metrics
H-Index
i10 Index
Citation Counts
1
0
9
Plant pathology
Plant Biotic and Abiotic Stress Physiology
Rankings
Ranking Based On Selection: 55
Asaf Shnel
Metrics
H-Index
i10 Index
Citation Counts
1
0
5