Citation Rankings
Highly Cited Researchers
AfricaAgriculture & Forestry / Plant Science Highly Cited Researchers 1.221 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
Evolutionary biology
pollination biology
plant reproduction
chemical ecology
invasion biology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,950
9,160
0.353
* Total Citation Counts Rankings
Ranking Based On Selection: 2
Andrology
Oxidative stress
Medicinal Plants
reactive oxygen species
male infertility
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,402
10,589
0.646
* Total Citation Counts Rankings
Ranking Based On Selection: 3
Plant ecology
vegetation-environmental relations
biogeography
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,058
4,202
0.299
* Total Citation Counts Rankings
Ranking Based On Selection: 4
Plant ecology
plant ecophysiology
conservation biology
invasion biology
ethnoecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,548
3,945
0.291
* Total Citation Counts Rankings
Ranking Based On Selection: 5
Plant Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,276
3,586
0.270
* Total Citation Counts Rankings
Ranking Based On Selection: 6
Plant Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,996
3,088
0.238
* Total Citation Counts Rankings
Ranking Based On Selection: 7
microbiology
plant pathology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,828
4,626
0.361
* Total Citation Counts Rankings
Ranking Based On Selection: 8
plant pathology
mycotoxin
aflatoxin
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,377
5,638
0.456
* Total Citation Counts Rankings
Ranking Based On Selection: 9
Nanobiotechnology
Plant Physiology
Environmental Botany
Medicinal Plants
Plant Propagation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,257
9,853
0.804
* Total Citation Counts Rankings
Ranking Based On Selection: 10
mycology
plant pathology
biological control
bioenergy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,165
8,005
0.658
* Total Citation Counts Rankings
Ranking Based On Selection: 11
Plant Breeding
Plant Genetics
Quantitative Genetics
Crop Science
Agricultural Plant Sciences
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,656
9,185
0.788
* Total Citation Counts Rankings
Ranking Based On Selection: 12
Pollen analysis
palaeoscience
palynology
palaeoecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,965
3,145
0.287
* Total Citation Counts Rankings
Ranking Based On Selection: 13
Plant Physiology (Legume/Rhizobium Symbiosis)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,785
4,107
0.381
* Total Citation Counts Rankings
Ranking Based On Selection: 14
plant ecophysiology
plant desiccation tolerance
seed biology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,576
2,147
0.203
* Total Citation Counts Rankings
Ranking Based On Selection: 15
Plant ecophysiology and ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,554
4,184
0.396
* Total Citation Counts Rankings
Ranking Based On Selection: 16
Historical Ecology
Conservation Biology
Arid Lands
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,305
3,152
0.306
* Total Citation Counts Rankings
Ranking Based On Selection: 17
Biological control
silicon in agriculture
plant breeding
African crops
climate change
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,192
6,087
0.597
* Total Citation Counts Rankings
Ranking Based On Selection: 18
Plant Physiology
Photosynthesis
Environmental Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,076
5,460
0.676
* Total Citation Counts Rankings
Ranking Based On Selection: 19
Plant Protection- Acarology -Nematology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,976
6,070
0.761
* Total Citation Counts Rankings
Ranking Based On Selection: 20
Drug development
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,637
2,794
0.421
* Total Citation Counts Rankings
Ranking Based On Selection: 21
Biological control of invasive alien plants
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,194
1,433
0.231
* Total Citation Counts Rankings
Ranking Based On Selection: 22
Plant Physiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,095
1,976
0.324
* Total Citation Counts Rankings
Ranking Based On Selection: 23
Abiotic Stress Physiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,949
5,716
0.961
* Total Citation Counts Rankings
Ranking Based On Selection: 24
Phenolic compounds
HPLC analysis
herbal teas
fruits
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,863
2,550
0.435
* Total Citation Counts Rankings
Ranking Based On Selection: 25
Plant Sciences
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,770
1,765
0.306
* Total Citation Counts Rankings
Rankings
28,676
84
8
Ranking Based On Selection: 1
Steven D. Johnson
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,950
9,160
0.353
Evolutionary biology
pollination biology
plant reproduction
chemical ecology
invasion biology
* Total Citation Counts Rankings
Rankings
54,441
182
5
Ranking Based On Selection: 2
Ralf Henkel
University of the Western Cape
Bellville, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,402
10,589
0.646
Andrology
Oxidative stress
Medicinal Plants
reactive oxygen species
male infertility
* Total Citation Counts Rankings
Rankings
66,736
229
1
Ranking Based On Selection: 3
Michael Rutherford
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,058
4,202
0.299
Plant ecology
vegetation-environmental relations
biogeography
* Total Citation Counts Rankings
Rankings
69,946
239
35
Ranking Based On Selection: 4
ETF Witkowski
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,548
3,945
0.291
Plant ecology
plant ecophysiology
conservation biology
invasion biology
ethnoecology
* Total Citation Counts Rankings
Rankings
71,775
242
50
Ranking Based On Selection: 5
Jill M. Farrant
University of Cape Town
Cape Town, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,276
3,586
0.270
* Total Citation Counts Rankings
Rankings
73,726
250
21
Ranking Based On Selection: 6
Karl Kunert
University of Pretoria
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,996
3,088
0.238
* Total Citation Counts Rankings
Rankings
74,944
253
22
Ranking Based On Selection: 7
Teresa Coutinho
University of Pretoria
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,828
4,626
0.361
* Total Citation Counts Rankings
Rankings
78,215
39
1
Ranking Based On Selection: 8
Ranajit Bandyopadhyay
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,377
5,638
0.456
plant pathology
mycotoxin
aflatoxin
* Total Citation Counts Rankings
Rankings
79,125
67
11
Ranking Based On Selection: 9
Azamal Husen
University of Gondar
Gondar, Ethiopia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,257
9,853
0.804
Nanobiotechnology
Plant Physiology
Environmental Botany
Medicinal Plants
Plant Propagation
* Total Citation Counts Rankings
Rankings
79,922
110
8
Ranking Based On Selection: 10
Mohamed Hashem Mohamed Ahmed
Assiut University
Asyut, Egypt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,165
8,005
0.658
mycology
plant pathology
biological control
bioenergy
* Total Citation Counts Rankings
Rankings
84,201
289
27
Ranking Based On Selection: 11
Hussien Shimelis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,656
9,185
0.788
Plant Breeding
Plant Genetics
Quantitative Genetics
Crop Science
Agricultural Plant Sciences
* Total Citation Counts Rankings
Rankings
90,608
313
5
Ranking Based On Selection: 12
Louis Scott
University of the Free State
Bloemfontein, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,965
3,145
0.287
Pollen analysis
palaeoscience
palynology
palaeoecology
* Total Citation Counts Rankings
Rankings
92,392
321
3
Ranking Based On Selection: 13
Felix Dapare Dakora
Tshwane University of Technology
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,785
4,107
0.381
Plant Physiology (Legume/Rhizobium Symbiosis)
* Total Citation Counts Rankings
Rankings
94,466
327
31
Ranking Based On Selection: 14
Norman Pammenter
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,576
2,147
0.203
plant ecophysiology
plant desiccation tolerance
seed biology
* Total Citation Counts Rankings
Rankings
94,677
328
77
Ranking Based On Selection: 15
Michael Denis Cramer
University of Cape Town
Cape Town, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,554
4,184
0.396
Plant ecophysiology and ecology
* Total Citation Counts Rankings
Rankings
97,349
346
85
Ranking Based On Selection: 16
M. Timm Hoffman
University of Cape Town
Cape Town, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,305
3,152
0.306
Historical Ecology
Conservation Biology
Arid Lands
* Total Citation Counts Rankings
Rankings
98,579
347
33
Ranking Based On Selection: 17
Mark Laing
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,192
6,087
0.597
Biological control
silicon in agriculture
plant breeding
African crops
climate change
* Total Citation Counts Rankings
Rankings
128,156
30
4
Ranking Based On Selection: 18
Abdallah Oukarroum
Mohammed VI Polytechnic University
Ben Guerir, Morocco
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
8,076
5,460
0.676
Plant Physiology
Photosynthesis
Environmental Science
* Total Citation Counts Rankings
Rankings
129,960
199
3
Ranking Based On Selection: 19
Mahmoud A Taha
Al Azhar University
Cairo, Egypt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,976
6,070
0.761
Plant Protection- Acarology -Nematology
* Total Citation Counts Rankings
Rankings
157,987
620
9
Ranking Based On Selection: 20
Bharti Odhav
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,637
2,794
0.421
* Total Citation Counts Rankings
Rankings
169,570
677
161
Ranking Based On Selection: 21
VC Moran
University of Cape Town
Cape Town, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,194
1,433
0.231
Biological control of invasive alien plants
* Total Citation Counts Rankings
Rankings
172,296
694
61
Ranking Based On Selection: 22
Richard Beckett
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,095
1,976
0.324
* Total Citation Counts Rankings
Rankings
176,519
311
7
Ranking Based On Selection: 23
Amr el Kelish
Suez Canal University
Ismailia, Egypt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,949
5,716
0.961
* Total Citation Counts Rankings
Rankings
179,154
729
1
Ranking Based On Selection: 24
Dalene De Beer
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,863
2,550
0.435
Phenolic compounds
HPLC analysis
herbal teas
fruits
* Total Citation Counts Rankings
Rankings
182,115
746
66
Ranking Based On Selection: 25
Marnie E. Light
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,770
1,765
0.306