1. Graduate School of Natural and Applied Sciences, Çukurova University, Adana, Turkey
2. Department of Crop and Soil Sciences, Lilongwe University of Agriculture and Natural Resources, Lilongwe, Malawi
3. Department of Agricultural Research Services, Makoka Research Station, Zomba, Malawi
4. Department of Agricultural Research Services, Bvumbwe Agricultural Research Station, Thyolo, Malawi