1. Department of Geography, Obafemi Awolowo University, Ile-Ife, Nigeria
2. Farm Platform Research Group, Rothamsted Research, North Wyke, Devon, UK
3. Institute of Bio- and Geosciences, Agrosphere (IBG – 3), Forschungszentrum, Jülich, Germany
4. Department of Geography, College of Environmental and Life Sciences, University of Exeter, UK