The utilisation of maize-crop residues for overwintering livestock. 3. Livestock performance as effected by different cattle to sheep ratios when grazing maize-crops

afrique du sud beef cattle bovin de boucherie carga ganadera crop residues gain de poids ganado de carne ganancia de peso grazing systems hivernage mais maize ovin ovinos residuos de cosechas sheep sistemas de pastoreo south africa stocking density taux de charge weight gain wintering