University, Subject, Country, Region, World
World 3.869 Scientists Subject Rankings - 2025
The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 197 sub-branches at global, national, and regional levels. These analyses are based on indicators such as the H-index, i10-index, and citation count, including their values from the last 6 years. As of Feb 03, 2025, the rankings are determined according to the Total H Index. BETA VERSION: The subject field rankings for the world, regions, countries, and universities are currently in their Beta phase. This is due to the exclusion of (870.057) scientists categorized under ‘Others’, whose profiles have yet to be determined, edited, or classified. As updates are made to these fields, the rankings will be adjusted accordingly. Note: Please keep this in mind while reviewing the rankings. For further details, explore our [University Subject Rankings].
* Total H IndexRankings
Ranking Based On Selection: 26
Soil science and Hydrology
Metrics
H-Index
i10 Index
Citation Counts
97
597
41,873
* Total H IndexRankings
Ranking Based On Selection: 27
Soil Science
Environmental Science
Microbial Ecology
Metrics
H-Index
i10 Index
Citation Counts
94
329
32,612
* Total H IndexRankings
Ranking Based On Selection: 28
soil microbial ecology
biogeochemistry
stable isotopes
ecosystem science
global change
Metrics
H-Index
i10 Index
Citation Counts
94
235
35,802
* Total H IndexRankings
Ranking Based On Selection: 29
Microbial Ecology
Soil Biology
Metrics
H-Index
i10 Index
Citation Counts
94
317
36,771
* Total H IndexRankings
Ranking Based On Selection: 30
Soil chemistry
soil biochemistry
plant nutrition
environmental issues related to agriculture
Metrics
H-Index
i10 Index
Citation Counts
94
222
40,863
* Total H IndexRankings
Ranking Based On Selection: 31
soil
water
flow transport
dielectrics
evaporation
Metrics
H-Index
i10 Index
Citation Counts
93
326
34,235
* Total H IndexRankings
Ranking Based On Selection: 32
Soil science
Soil organic matter cycling
Resource-efficient agriculture
Permafrost soils
Biotic-abiotic interactions in soil
Metrics
H-Index
i10 Index
Citation Counts
93
271
43,723
* Total H IndexRankings
Ranking Based On Selection: 33
soil
trace elements
biogeochemistry
Metrics
H-Index
i10 Index
Citation Counts
90
215
27,846
* Total H IndexRankings
Ranking Based On Selection: 34
Soil Science
Environmental Science
Climate science
Earth System Science
Metrics
H-Index
i10 Index
Citation Counts
89
338
60,774
* Total H IndexRankings
Ranking Based On Selection: 35
Soil and Water Quality
Metrics
H-Index
i10 Index
Citation Counts
85
371
25,949
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* Total H IndexRankings
Ranking Based On Selection: 36
Natural Resources Management
Soil Science
Tropical Agriculture
climate Change
Metrics
H-Index
i10 Index
Citation Counts
85
282
22,201
* Total H IndexRankings
Ranking Based On Selection: 37
soil
organic matter
C storage
soil structure
microbial habitat
Metrics
H-Index
i10 Index
Citation Counts
84
217
31,056
* Total H IndexRankings
Ranking Based On Selection: 38
Molecular Microbiology
Soil Science
Biogeochemistry
Ecosystem Ecology
Sustainable Agriculture
Metrics
H-Index
i10 Index
Citation Counts
84
171
45,476
* Total H IndexRankings
Ranking Based On Selection: 39
soil science
biogeochemistry
environmental science
Metrics
H-Index
i10 Index
Citation Counts
84
258
26,965
* Total H IndexRankings
Ranking Based On Selection: 40
soil physics
soil
water
vadose zone hydrology
soil science
Metrics
H-Index
i10 Index
Citation Counts
83
356
34,578
* Total H IndexRankings
Ranking Based On Selection: 41
Soil ecology
agroecology
soil quality
sustainable agriculture
Metrics
H-Index
i10 Index
Citation Counts
83
186
27,182
* Total H IndexRankings
Ranking Based On Selection: 42
irrigation
evapotranspiration
Metrics
H-Index
i10 Index
Citation Counts
83
283
27,202
* Total H IndexRankings
Ranking Based On Selection: 43
soil science
agronomy
agriculture
environmental science
Metrics
H-Index
i10 Index
Citation Counts
82
240
27,650
* Total H IndexRankings
Ranking Based On Selection: 44
Soil Science
Environmental Chemistry
Clay Minerals
Enhanced weathering
Metrics
H-Index
i10 Index
Citation Counts
81
202
19,207
* Total H IndexRankings
Ranking Based On Selection: 45
Soil science
Metrics
H-Index
i10 Index
Citation Counts
80
218
32,549
* Total H IndexRankings
Ranking Based On Selection: 46
soil science
soil chemistry
biogeochemistry
environmental chemistry
ecosystem research
Metrics
H-Index
i10 Index
Citation Counts
80
239
21,372
* Total H IndexRankings
Ranking Based On Selection: 47
soil
Metrics
H-Index
i10 Index
Citation Counts
79
272
23,917
* Total H IndexRankings
Ranking Based On Selection: 48
Soil science
Soil chemistry
Soil biology
Metrics
H-Index
i10 Index
Citation Counts
79
266
24,535
* Total H IndexRankings
Ranking Based On Selection: 49
soil science
soil fertility
soil genesis
colour
soil mineralogy
Metrics
H-Index
i10 Index
Citation Counts
79
214
19,166
* Total H IndexRankings
Ranking Based On Selection: 50
Tropical soils
hunger
nutrition
Metrics
H-Index
i10 Index
Citation Counts
79
213
35,402
Ji-Zheng He
Metrics
H-Index
i10-Index
Citation Counts
94
329
32,612
Soil Science
Environmental Science
Microbial Ecology
Bruce Hungate
Northern Arizona University
Flagstaff, United States
Metrics
H-Index
i10-Index
Citation Counts
94
235
35,802
soil microbial ecology
biogeochemistry
stable isotopes
ecosystem science
global change
Ellen Kandeler
Universität Hohenheim
Stuttgart, Germany
Metrics
H-Index
i10-Index
Citation Counts
94
317
36,771
Microbial Ecology
Soil Biology
M Ali Tabatabai
Metrics
H-Index
i10-Index
Citation Counts
94
222
40,863
Soil chemistry
soil biochemistry
plant nutrition
environmental issues related to agriculture
Dani Or
Metrics
H-Index
i10-Index
Citation Counts
93
326
34,235
soil
water
flow transport
dielectrics
evaporation
Georg Guggenberger
Universität Hannover
Hannover, Germany
Metrics
H-Index
i10-Index
Citation Counts
93
271
43,723
Soil science
Soil organic matter cycling
Resource-efficient agriculture
Permafrost soils
Biotic-abiotic interactions in soil
Ruben Kretzschmar
Metrics
H-Index
i10-Index
Citation Counts
90
215
27,846
soil
trace elements
biogeochemistry
Wim De Vries
Wageningen University & Research Centre
Wageningen, Netherlands
Metrics
H-Index
i10-Index
Citation Counts
89
338
60,774
Soil Science
Environmental Science
Climate science
Earth System Science
Yuncong Li
University of Florida
Gainesville, United States
Metrics
H-Index
i10-Index
Citation Counts
85
371
25,949
Soil and Water Quality
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Paul Vlek
Metrics
H-Index
i10-Index
Citation Counts
85
282
22,201
Natural Resources Management
Soil Science
Tropical Agriculture
climate Change
Claire Chenu
Metrics
H-Index
i10-Index
Citation Counts
84
217
31,056
soil
organic matter
C storage
soil structure
microbial habitat
Eoin Brodie
Metrics
H-Index
i10-Index
Citation Counts
84
171
45,476
Molecular Microbiology
Soil Science
Biogeochemistry
Ecosystem Ecology
Sustainable Agriculture
Leo Condron
Lincoln University Canterbury
Christchurch, New Zealand
Metrics
H-Index
i10-Index
Citation Counts
84
258
26,965
soil science
biogeochemistry
environmental science
Robert Horton
Metrics
H-Index
i10-Index
Citation Counts
83
356
34,578
soil physics
soil
water
vadose zone hydrology
soil science
Lijbert Brussaard
Wageningen University & Research Centre
Wageningen, Netherlands
Metrics
H-Index
i10-Index
Citation Counts
83
186
27,182
Soil ecology
agroecology
soil quality
sustainable agriculture
Terry A Howell SR|Terry A. Howell, Sr.
Texas A&M University
College Station, United States
Metrics
H-Index
i10-Index
Citation Counts
83
283
27,202
irrigation
evapotranspiration
Alan Franzluebbers
US Department of Agriculture
Washington, United States
Metrics
H-Index
i10-Index
Citation Counts
82
240
27,650
soil science
agronomy
agriculture
environmental science
Binoy Sarkar
Lancaster University
Lancaster, United Kingdom
Metrics
H-Index
i10-Index
Citation Counts
81
202
19,207
Soil Science
Environmental Chemistry
Clay Minerals
Enhanced weathering
Keith Goulding
Rothamsted Research
Harpenden, United Kingdom
Metrics
H-Index
i10-Index
Citation Counts
80
218
32,549
Wolfgang Wilcke
Karlsruhe Institute of Technology
Karlsruhe, Germany
Metrics
H-Index
i10-Index
Citation Counts
80
239
21,372
soil science
soil chemistry
biogeochemistry
environmental chemistry
ecosystem research
Roland Bol
Metrics
H-Index
i10-Index
Citation Counts
79
272
23,917
Ram Dalal
University of Queensland
St Lucia, Australia
Metrics
H-Index
i10-Index
Citation Counts
79
266
24,535
Soil science
Soil chemistry
Soil biology
Jose Torrent
Universidad de Córdoba
Córdoba, Spain
Metrics
H-Index
i10-Index
Citation Counts
79
214
19,166
soil science
soil fertility
soil genesis
colour
soil mineralogy
Pedro A Sanchez
University of Florida
Gainesville, United States
Metrics
H-Index
i10-Index
Citation Counts
79
213
35,402
Tropical soils
hunger
nutrition