Padlass P. Edeafour Soil Research Institute, Council for Scientific and Industrial Research, Kwadaso-Kumasi, Ghana
Aad Kessler Department of Environmental Sciences, Soil Physics and Land Management Chair Group, Wageningen University and Research, Netherlands
Suzanne Philips Plant Production and Protection, Food and Agriculture Organisation, Rome, Italy
Enoch Kwame Tham-Agyekum Department of Agricultural Economics, Agribusiness and Extension, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana