Former visiting scientists
| Dr. Pedro Paulo Teixeira | Universidade Federal de Viçosa, Brasilien |
| Prof. Peter Kopittke | The University of Queensland, Australia |
| Dr. Salifou Traore | Université de Ouagadougou, Burkina Faso |
| PhD-Stud Carlo Angeletti | Università Politecnica Delle Marche, Ancona, Italien |
| Luis Carlos Colocho Hurtarte | Universidade Federal de Viçosa, Brasilia |
| MSc-Stud. Frédérique Kirkels | University of Amsterdam (Netherlands) |
| MSc-Stud. Jasmin Schiefer | University of Natural Resources and Life Sciences, Vienna (Austria) |
| PhD-Stud Taru Lehtinen | Institute of Soil Research, University of Iceland and University of Natural Resources and Life Sciences, Vienna (Austria) |
| Dr. Chao Liang | DOE-Great Lakes Bioenergy Research Center (GLBRC) at the University of Wisconsin-Madison |
| PhD-Stud. Noelia G. Franco | Centro de Edafologia y Biologia Aplicada del Segura (Spain) |
| Dr. Ana Rosa Passos Pereira | Laboratório de Espectroscopia Mössbauer/Depto de Química-UFMG (Brazil) |
| PhD-Stud. Wu Honghui | Institute of Botany, the Chinese Academic of Science (China) |
| PhD-Stud. Yueqin Cheng | Institute of Soil Science, the Chinese Academic of Science (China) |
| Dr. Ana Teresa Lima | Universiteit Utrecht (Netherlands) |
| PhD-Stud. Tao Ma | Department of Soil and Water Science, College of Agricultural Resources and Environment (China) |
| PhD-Stud. Kevin Müller | Pennsylvania State University, Ecology and Woody Plant Physiology University Park (USA) |
| PhD-Stud. Natalja Petschonkina | Kazanskiji gosudarstwenniji Universitet imeni Lenina, Kazan (Russia) |
| MSc-Stud. Sabine Pols | Universiteit Utrecht, Utrecht (Netherlands) |
| PhD-Stud. Marta Velasco Molin | Fac. Biologia, Dept. Edafología y Química Agrícola, Univ. Santiago de Compostela, A CORUÑA (Spain) |
| PhD-Stud. Yessica A. Rivas Tisnao | Universidad Austral de Chile, Valdivia (Chile) |
| PhD-Stud. Laura Sanchez Garcia | IGME Instituto Geológico y Minero de España, Madrid (Spain) |
| PhD-Stud. Susumu Shin Abe | Laboratory of Soil Science Faculty of Agriculture, Tottori University, Tottori (Japan) |
| PhD-Stud. Silvia Orsetti | INQUIMAE, C. Universitaria, Buenos Aires (Argentina) |
| PhD-Stud. Cristina Santín Nuno | INDUROT, Universidad de Oviedo, Mieres (Spain) |
| PhD-Stud. Sha Qi | Chinese Agricultural University, Beijing (China) |
| PhD-Stud. Haixia Zheng | Chinese Agricultural University, Beijing (China) |
| Cand.min. T. Andersen | Inst. of Geomorphology, Univ. of Aarhus, Aarhus (Denmark) |
| PhD-Stud. J. Diekow | Univ. Federal do Rio Grande do Sul, Porto Alegre (Brazil) |
| Dr. M.F. Dignac | INRA, Paris (France) |
| PhD. A. Campbell | Soil Sci. Dept., Lincoln Univ., Lincoln (New Zealand) |
| Dr. M. Fontes | Vicosa (Brazil) |
| PhD-Stud. C. Goncalves | Univ. Federal do Rio Grande do Sul, Porto Alegre (Brazil) |
| Prof. M. Hatcher | Dept. of Chemistry, Pennsylvania State Univ., University Park (USA) |
| M.Sc.agr. S. Islam | Min. of Agriculture, Dakar (Bangladesch) |
| Ing.geol. D.P. Madhikarmi | Dept.of Mines and Geology, Kathmandu (Nepal) |
| Dr. N. Maie | Lab. of Soil Biology and Chemistry, Nagoya Univ., Nagoya (Japan) |
| Dr. S. McMillan | Inst. of Geol. & Nuclear Sci., Crown Res. Dunedin, Dunedin (New Zealand) |
| Dr. D. Pinheiro-Dick | Univ. Federal do Rio Grande do Sul, Porto Alegre (Brazil) |
| A.R. Ravelonarivo | Univ.of Antananarivo, Antananarivo (Madagaskar) |
| PhD−Stud. Clodoaldo dos Santos | Univ. Federal do Rio Grande do Sul, Porto Alegre (Brazil) |