1. Department of Environment and Sustainable Development, Mzumbe University, Morogoro, Tanzania
2. Department of Soil and Geological Science, Sokoine University of Agriculture, Morogoro, Tanzania
3. Plant Production Department, College of Food and Agriculture Sciences, King Saud University, Riyadh, Riyadh, Saudi Arabia
4. Department of Biosystems and Agricultural Engineering (BAE), College of Agriculture and Natural Resources, Michigan State University, East Lansing, MI, USA
5. Department of Agricultural Science and Technology, School of Agriculture and Environmental Science, Kenyatta University, Nairobi, Kenya