1. Department of Livestock and Pasture Sciences, Faculty of Science and Agriculture University of Fort Hare, P/Bag X1314, Alice 5700, South Africa
2. Rwanda Institute for Conservation Agriculture, Kagasa-Rweru Road, Gashora/Rweru Districts, Bugesera, Rwanda
3. Department of Microbial Biochemical and Food Biotechnology, University of Free State, P.O. Box 339, Bloemfontein 9300, South Africa
4. Department of Agriculture and Animal Health, University of South Africa, Johannesburg, South Africa