Citation Rankings
Highly Cited Researchers
Highly Cited Researchers 138 Scientists Citation Rankings - 2025
The Citation Rankings (Highly Cited Researchers) list highlight the most cited and influential researchers across a vast range of scientific fields, covering 197 main and sub-disciplines, including the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings. This service, offered exclusively by AD Scientific Index, aims to provide a balanced perspective by excluding data from CERN and other statistical sources that disproportionately favor certain researchers, particularly in the social sciences and humanities. This unique approach addresses the advantages researchers with multi-author publications and CERN involvement hold over others. Furthermore, citation rankings help uncover rule violations and unethical practices within the research community. For more detailed citation analyses, explore the Scientists Last 6 Years Citation Index, Universities Total Citations Rankings 2025, and Universities Last 6 Years Citations Rankings 2025.
* Total Citation Counts Rankings
Ranking Based On Selection: 1
Parasitology
Global burden of diseases
Neglected parasitic diseases in Tropics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
84,512
74,716
0.884
* Total Citation Counts Rankings
Ranking Based On Selection: 2
Soil Science
Forestry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,468
3,410
0.457
* Total Citation Counts Rankings
Ranking Based On Selection: 3
Pollination Biology and biological control research
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,936
3,363
0.567
* Total Citation Counts Rankings
Ranking Based On Selection: 4
Plant Breeding and Horticulture
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,593
978
0.614
* Total Citation Counts Rankings
Ranking Based On Selection: 5
Agricultural Sciences
Coffee
Horticulture
Crop Improvement.
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,586
983
0.620
* Total Citation Counts Rankings
Ranking Based On Selection: 6
Sustainable land Management
Land degradation neutrality (LDN)
soil fertility
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,223
715
0.585
* Total Citation Counts Rankings
Ranking Based On Selection: 7
Microbiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,207
712
0.590
* Total Citation Counts Rankings
Ranking Based On Selection: 8
Climate change
agricultural productivity
policy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,042
323
0.310
* Total Citation Counts Rankings
Ranking Based On Selection: 9
Computers engineering
Networking
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
999
425
0.425
* Total Citation Counts Rankings
Ranking Based On Selection: 10
Molecular Entomology Parasitology and Biotechnology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
877
401
0.457
* Total Citation Counts Rankings
Ranking Based On Selection: 11
Microbiology
virology
microbial diversity
biotechnology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
783
534
0.682
* Total Citation Counts Rankings
Ranking Based On Selection: 12
Physical Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
752
598
0.795
* Total Citation Counts Rankings
Ranking Based On Selection: 13
Production economics
farm efficiency
food security
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
740
503
0.680
* Total Citation Counts Rankings
Ranking Based On Selection: 14
Epidemiology
Medical Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
724
510
0.704
* Total Citation Counts Rankings
Ranking Based On Selection: 15
Blue Carbon expert
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
613
534
0.871
* Total Citation Counts Rankings
Ranking Based On Selection: 16
Nematology
Ecology
Crop protection
Climate Change
Biotechnology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
576
351
0.609
* Total Citation Counts Rankings
Ranking Based On Selection: 17
microbiology
biochemistry and genetics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
546
362
0.663
* Total Citation Counts Rankings
Ranking Based On Selection: 18
Bioreactors
bioenergy
process modelling
catalysis
Fluidization
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
463
297
0.641
* Total Citation Counts Rankings
Ranking Based On Selection: 19
Agronomy and Plant Physiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
422
96
0.227
* Total Citation Counts Rankings
Ranking Based On Selection: 20
Organometallic Chemistry
Coordination Chemistry
olefin oligomerization and polymerization
Inorganic and Bio-inorganic Chemist
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
414
260
0.628
* Total Citation Counts Rankings
Ranking Based On Selection: 21
Climate Change
Nutrient deposition
Plant physiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
386
321
0.832
* Total Citation Counts Rankings
Ranking Based On Selection: 22
Phytochemistry
Natural Products
Molecular Modeling
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
345
282
0.817
* Total Citation Counts Rankings
Ranking Based On Selection: 23
Microeconomics
macroeconomics
international economics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
334
301
0.901
* Total Citation Counts Rankings
Ranking Based On Selection: 24
Plant Breeding
Biotechnology
Dryland agriculture
Crop Protection
Sustainable Seed Systems
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
310
225
0.726
* Total Citation Counts Rankings
Ranking Based On Selection: 25
Analytical and instrumentation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
303
227
0.749
* Total Citation Counts Rankings
Rankings
4,342
3
1
Ranking Based On Selection: 1
Josephine Ngunjiri
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
84,512
74,716
0.884
Parasitology
Global burden of diseases
Neglected parasitic diseases in Tropics
* Total Citation Counts Rankings
Rankings
139,654
45
2
Ranking Based On Selection: 2
Mugendi Daniel Njiru
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,468
3,410
0.457
* Total Citation Counts Rankings
Rankings
176,923
61
3
Ranking Based On Selection: 3
Otieno Mark|Mark Anyanga Otieno
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,936
3,363
0.567
Pollination Biology and biological control research
* Total Citation Counts Rankings
Rankings
522,980
403
4
Ranking Based On Selection: 4
Gichimu BM
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,593
978
0.614
Plant Breeding and Horticulture
* Total Citation Counts Rankings
Rankings
524,439
405
5
Ranking Based On Selection: 5
Bernard Gichimu
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,586
983
0.620
Agricultural Sciences
Coffee
Horticulture
Crop Improvement.
* Total Citation Counts Rankings
Rankings
614,500
551
6
Ranking Based On Selection: 6
Jeremiah Mosioma Okeyo
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,223
715
0.585
Sustainable land Management
Land degradation neutrality (LDN)
soil fertility
* Total Citation Counts Rankings
Rankings
619,191
561
7
Ranking Based On Selection: 7
Romano Mwirichia
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,207
712
0.590
* Total Citation Counts Rankings
Rankings
672,068
655
8
Ranking Based On Selection: 8
Hezron Mogaka
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,042
323
0.310
Climate change
agricultural productivity
policy
* Total Citation Counts Rankings
Rankings
687,167
680
9
Ranking Based On Selection: 9
George Nyambura
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
999
425
0.425
Computers engineering
Networking
* Total Citation Counts Rankings
Rankings
733,873
770
10
Ranking Based On Selection: 10
Eucharia Kenya
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
877
401
0.457
Molecular Entomology Parasitology and Biotechnology
* Total Citation Counts Rankings
Rankings
773,601
845
11
Ranking Based On Selection: 11
Nancy Budambula
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
783
534
0.682
Microbiology
virology
microbial diversity
biotechnology
* Total Citation Counts Rankings
Rankings
787,497
875
12
Ranking Based On Selection: 12
Jackson Wachira Muthengia
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
752
598
0.795
* Total Citation Counts Rankings
Rankings
793,057
887
13
Ranking Based On Selection: 13
Samuel Njiri Ndirangu
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
740
503
0.680
Production economics
farm efficiency
food security
* Total Citation Counts Rankings
Rankings
800,525
907
14
Ranking Based On Selection: 14
Asweto Collins Otieno
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
724
510
0.704
Epidemiology
Medical Science
* Total Citation Counts Rankings
Rankings
856,123
1,031
15
Ranking Based On Selection: 15
Michael N. Githaiga
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
613
534
0.871
* Total Citation Counts Rankings
Rankings
876,887
1,068
16
Ranking Based On Selection: 16
Hannah Karuri
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
576
351
0.609
Nematology
Ecology
Crop protection
Climate Change
Biotechnology
* Total Citation Counts Rankings
Rankings
894,882
1,111
17
Ranking Based On Selection: 17
Julius Ndirangu Mugweru
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
546
362
0.663
microbiology
biochemistry and genetics
* Total Citation Counts Rankings
Rankings
961,074
1,210
18
Ranking Based On Selection: 18
Seth Apollo
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
463
297
0.641
* Total Citation Counts Rankings
Rankings
999,356
1,279
19
Ranking Based On Selection: 19
Gitari Josia Njiru
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
422
96
0.227
* Total Citation Counts Rankings
Rankings
1,006,793
1,294
20
Ranking Based On Selection: 20
George Simba Nyamato
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
414
260
0.628
Organometallic Chemistry
Coordination Chemistry
olefin oligomerization and polymerization
Inorganic and Bio-inorganic Chemist
* Total Citation Counts Rankings
Rankings
1,034,801
1,342
21
Ranking Based On Selection: 21
Justine Muhoro Nyaga
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
386
321
0.832
Climate Change
Nutrient deposition
Plant physiology
* Total Citation Counts Rankings
Rankings
1,079,992
1,426
22
Ranking Based On Selection: 22
Mark Kimani|Njogu M. Kimani
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
345
282
0.817
* Total Citation Counts Rankings
Rankings
1,093,046
1,444
23
Ranking Based On Selection: 23
Kennedy Nyabuto Ocharo
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
334
301
0.901
Microeconomics
macroeconomics
international economics
* Total Citation Counts Rankings
Rankings
1,124,232
1,526
24
Ranking Based On Selection: 24
Phyllis W. Muturi
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
310
225
0.726
Plant Breeding
Biotechnology
Dryland agriculture
Crop Protection
Sustainable Seed Systems
* Total Citation Counts Rankings
Rankings
1,133,625
1,550
25
Ranking Based On Selection: 25
Mr. Mukono|S.T. Mukono, Simon T. Mukono
University of Embu
Embu, Kenya
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
303
227
0.749