1. Wolaita Sodo University, Department of Plant Sciences, Wolaita Sodo, Ethiopia
2. Hawassa University, School of Plant and Horticultural Science, Hawassa, Ethiopia
3. Ethiopian Institute of Agricultural Research, Addis Abeba, Ethiopia
4. Bahir Dar University, College of Agriculture and Environmental Sciences, Bahir Dar, Ethiopia
5. Hohenheim University, Institute of Soil Science and Land Evaluation, Bio geophysics, Stuttgart, Germany