1. Department of Agricultural Economics and Animal Production, Private Bag X1106, Sovenga, 0727, University of Limpopo, South Africa
2. University of Venda, Department of Statistics, Thohoyandou0950, South Africa Private Bag X1106, Sovenga, 0727, South Africa
3. Risk and Vulnerability Science Centre/VLIR-IUC, Private Bag X1106, Sovenga, 0727, University of Limpopo, South Africa
4. Limpopo Department of Agriculture, 69 Biccard Street, Polokwane, 0700, South Africa