Crop-livestock intensification in Southern Africa: Drivers, opportunities and crop residue utilization - Homann-Kee Tui, Sabine; Tanganyika, J.; Maute, F.R.; Nkomboni, D.; Mpofu, N.; Gondwe, T.N.P.; Dias, P.; Ncube, S.; Rooyen, Andre F. van (International Crops Research Institute for the Semi-Arid Tropics, 2011)