Universidad de Córdoba

Professor, Soil and Water Science Department, University of Florida

Emeritus Professor, School of Science, University of Waikato, Hamilton, New Zealand

Former Principal Scientist, NBSSLUP(ICAR), Nagpu r,India; Former Consultant, ICRISAT …

Professor Sênior UNESP, Soil Science - Campus de Jaboticabal

Tianjin University

Clays and Clay Minerals in Africa

Principal Scientist and Head Divison of Soil Resource Studies

Raman Centre for Applied and Interdisciplinary Sciences & Agtec Innovations Inc

King Saud University