Citation Rankings
Highly Cited Researchers
Africa Agriculture & ForestryAgriculture & Forestry / Plant Science Highly Cited Researchers Citation Rankings 2025
The Citation Rankings (Highly Cited Researchers) 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
25,523
10,414
0.408
* 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
15,914
10,900
0.685
* 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
13,896
4,885
0.352
* 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
13,431
4,725
0.352
* Total Citation Counts Rankings
Ranking Based On Selection: 5
Plant Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,132
4,178
0.318
* Total Citation Counts Rankings
Ranking Based On Selection: 6
Plant Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,844
3,580
0.279
* Total Citation Counts Rankings
Ranking Based On Selection: 7
microbiology
plant pathology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,636
5,227
0.414
* Total Citation Counts Rankings
Ranking Based On Selection: 8
plant pathology
mycotoxin
aflatoxin
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,075
6,378
0.528
* Total Citation Counts Rankings
Ranking Based On Selection: 9
mycology
plant pathology
biological control
bioenergy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,686
8,101
0.693
* Total Citation Counts Rankings
Ranking Based On Selection: 10
Nanobiotechnology
Plant Physiology
Environmental Botany
Medicinal Plants
Plant Propagation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,389
9,808
0.861
* 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
11,188
9,537
0.852
* Total Citation Counts Rankings
Ranking Based On Selection: 12
Pollen analysis
palaeoscience
palynology
palaeoecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,795
3,606
0.334
* Total Citation Counts Rankings
Ranking Based On Selection: 13
Plant Physiology (Legume/Rhizobium Symbiosis)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,631
4,691
0.441
* 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
10,472
2,524
0.241
* Total Citation Counts Rankings
Ranking Based On Selection: 15
Plant ecophysiology and ecology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,404
4,818
0.463
* 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
10,179
3,624
0.356
* 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
9,901
6,539
0.660
* Total Citation Counts Rankings
Ranking Based On Selection: 18
Plant Physiology
Photosynthesis
Environmental Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,777
5,761
0.741
* Total Citation Counts Rankings
Ranking Based On Selection: 19
Plant Protection- Acarology -Nematology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,335
6,113
0.833
* Total Citation Counts Rankings
Ranking Based On Selection: 20
Drug development
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,555
3,192
0.487
* 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
6,138
1,649
0.269
* Total Citation Counts Rankings
Ranking Based On Selection: 22
Plant Physiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,008
2,228
0.371
* Total Citation Counts Rankings
Ranking Based On Selection: 23
Phenolic compounds
HPLC analysis
herbal teas
fruits
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,758
3,047
0.529
* Total Citation Counts Rankings
Ranking Based On Selection: 24
Plant Sciences
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,694
2,121
0.372
* Total Citation Counts Rankings
Ranking Based On Selection: 25
Conservation
Plant-herbivore interaction
wild herbivore nutrition
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,672
2,068
0.365
* Total Citation Counts Rankings
Rankings
28,619
83
8
Ranking Based On Selection: 1
Steven D. Johnson
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,523
10,414
0.408
Evolutionary biology
pollination biology
plant reproduction
chemical ecology
invasion biology
* Total Citation Counts Rankings
Rankings
55,319
183
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
15,914
10,900
0.685
Andrology
Oxidative stress
Medicinal Plants
reactive oxygen species
male infertility
* Total Citation Counts Rankings
Rankings
66,114
226
1
Ranking Based On Selection: 3
Michael Rutherford
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,896
4,885
0.352
Plant ecology
vegetation-environmental relations
biogeography
* Total Citation Counts Rankings
Rankings
69,001
235
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
13,431
4,725
0.352
Plant ecology
plant ecophysiology
conservation biology
invasion biology
ethnoecology
* Total Citation Counts Rankings
Rankings
71,074
239
49
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
13,132
4,178
0.318
* Total Citation Counts Rankings
Rankings
73,048
242
20
Ranking Based On Selection: 6
Karl Kunert
University of Pretoria
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,844
3,580
0.279
* Total Citation Counts Rankings
Rankings
74,585
248
22
Ranking Based On Selection: 7
Teresa Coutinho
University of Pretoria
Pretoria, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,636
5,227
0.414
* Total Citation Counts Rankings
Rankings
78,744
35
1
Ranking Based On Selection: 8
Ranajit Bandyopadhyay
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
12,075
6,378
0.528
plant pathology
mycotoxin
aflatoxin
* Total Citation Counts Rankings
Rankings
81,931
111
9
Ranking Based On Selection: 9
Mohamed Hashem Mohamed Ahmed
Assiut University
Asyut, Egypt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,686
8,101
0.693
mycology
plant pathology
biological control
bioenergy
* Total Citation Counts Rankings
Rankings
84,543
70
11
Ranking Based On Selection: 10
Azamal Husen
University of Gondar
Gondar, Ethiopia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,389
9,808
0.861
Nanobiotechnology
Plant Physiology
Environmental Botany
Medicinal Plants
Plant Propagation
* Total Citation Counts Rankings
Rankings
86,387
298
28
Ranking Based On Selection: 11
Hussien Shimelis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,188
9,537
0.852
Plant Breeding
Plant Genetics
Quantitative Genetics
Crop Science
Agricultural Plant Sciences
* Total Citation Counts Rankings
Rankings
90,152
311
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
10,795
3,606
0.334
Pollen analysis
palaeoscience
palynology
palaeoecology
* Total Citation Counts Rankings
Rankings
91,830
318
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
10,631
4,691
0.441
Plant Physiology (Legume/Rhizobium Symbiosis)
* Total Citation Counts Rankings
Rankings
93,419
324
30
Ranking Based On Selection: 14
Norman Pammenter
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
10,472
2,524
0.241
plant ecophysiology
plant desiccation tolerance
seed biology
* Total Citation Counts Rankings
Rankings
94,105
331
79
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
10,404
4,818
0.463
Plant ecophysiology and ecology
* Total Citation Counts Rankings
Rankings
96,564
343
86
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
10,179
3,624
0.356
Historical Ecology
Conservation Biology
Arid Lands
* Total Citation Counts Rankings
Rankings
99,610
350
33
Ranking Based On Selection: 17
Mark Laing
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
9,901
6,539
0.660
Biological control
silicon in agriculture
plant breeding
African crops
climate change
* Total Citation Counts Rankings
Rankings
130,688
31
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
7,777
5,761
0.741
Plant Physiology
Photosynthesis
Environmental Science
* Total Citation Counts Rankings
Rankings
139,248
221
4
Ranking Based On Selection: 19
Mahmoud A Taha
Al Azhar University
Cairo, Egypt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
7,335
6,113
0.833
Plant Protection- Acarology -Nematology
* Total Citation Counts Rankings
Rankings
156,641
617
9
Ranking Based On Selection: 20
Bharti Odhav
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,555
3,192
0.487
* Total Citation Counts Rankings
Rankings
167,607
667
160
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
6,138
1,649
0.269
Biological control of invasive alien plants
* Total Citation Counts Rankings
Rankings
171,134
687
61
Ranking Based On Selection: 22
Richard Beckett
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,008
2,228
0.371
* Total Citation Counts Rankings
Rankings
178,518
725
1
Ranking Based On Selection: 23
Dalene De Beer
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,758
3,047
0.529
Phenolic compounds
HPLC analysis
herbal teas
fruits
* Total Citation Counts Rankings
Rankings
180,564
735
64
Ranking Based On Selection: 24
Marnie E. Light
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,694
2,121
0.372
* Total Citation Counts Rankings
Rankings
181,321
738
16
Ranking Based On Selection: 25
CC Grant
Rhodes University
Grahamstown, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
5,672
2,068
0.365
Conservation
Plant-herbivore interaction
wild herbivore nutrition