University Distinguished Professor Emeritus, Michigan State University

Northwest A & F University, China

Liberty Hyde Bailey Professor, Cornell University

Sindh agriculture university tandojam

Soil Science of Temperate Ecosystems, Agricultural Soil Science, University of Göttingen

University of Western Australia

Emeritus Professor of Agronomy, University of Nebraska

Professor, Nanjing Agricultural University

The University of Sydney

Professor on Integrated Nutrient Impact Modelling Wageningen University