Citation Rankings (Highly Cited Researchers) 2024 and list of influential and most cited researchers in Agriculture and Forestry, Art, Design and Architecture, Business and Management, Economics and Econometrics, Education, Engineering and Technology, History, Philosophy, Theology, Law, Medicine and Health Sciences, Natural Sciences and Social Sciences and their 256 sub-branches is a unique service offered only by “AD Scientific Index”. You can see the most cited and influential researchers in the country and region. See also for more specific citation analyses: "last 6 years citation index" Universities Rankings 2024 (Sort by: Total Citations) and Universities Rankings 2024 (Sort by : Last 6 Years Citations)
* Total Citation Counts Rankings
World Rank
791,038
Country Rank
229,282
Institution Rank : 47
![](https://cdn.adscientificindex.com/logos/11558.png)
![United States](/flags/us.png)
![Johan Liebens](/user/assets/images/profile/no-profile-photo.png)
soil science
geomorphology
environmental science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
710
218
0.307
* Total Citation Counts Rankings
World Rank
833,722
Country Rank
238,830
Institution Rank : 49
![](https://cdn.adscientificindex.com/logos/11558.png)
![United States](/flags/us.png)
![Geoffrey Marchal](https://cdn.adscientificindex.com/pictures/a5/1685705.jpg)
environmental science
analytical chemistry
passive sampling
risk assessment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
626
273
0.436
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
791,038
![United States](/flags/us.png)
229,282
![](https://cdn.adscientificindex.com/logos/11558.png)
47
Johan Liebens
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
710
218
0.307
![](https://cdn.adscientificindex.com/logos/11558.png)
soil science
geomorphology
environmental science
* Total Citation Counts Rankings
Rankings
![](/assets/images/world-icon.png)
833,722
![United States](/flags/us.png)
238,830
![](https://cdn.adscientificindex.com/logos/11558.png)
49
Geoffrey Marchal
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
626
273
0.436
![](https://cdn.adscientificindex.com/logos/11558.png)
environmental science
analytical chemistry
passive sampling
risk assessment