1. Energy and Protein Requirements of Ruminants. An Advisory Manual Prepared by the AFRC Technical Committee on Response to Nutrients;AFRC,1993
2. Condition and Management of the Rangelands in the Western Province of Zambia;Baars,1996
3. Barnes, D.L., 1956. Veld Management Studies at the Gwebi College of Agriculture, Southern Rhodesia. Witwatersrand University, Johannesburg, South Africa.
4. Boudet, G., 1991. Manuel sur les Pâturages Tropicaux et les Cultures Fourragères. Institut d’Elevage et de Médecine Vétérinaire des Pays Tropicaux (IEMVT). Maisons-Alfort, France.
5. Nitrogen cycling and management of soil fertility in small-scale farming systems in north eastern Zimbabwe;Campbell;J. Sust. Agric.,1998