Verwysings
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- Gammon , D.M. and Roberts , B.R. 1978 . (a) Patterns of defoliation during continuous and rotational grazing of the Matopos Sandveld of Rhodesia. 1. Selectivity of grazing . Rhod. J. Agric. Res. , 16 : 117 – 131 .
- Gammon , D.M. and Roberts , B.R. 1978 . (b) Patterns of defoliation during continuous and rotational grazing of the Matopos Sandveld of Rhodesia. 2. Severity of defoliation . Rhod. J. Agric. Res. , 16 : 133 – 145 .
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- Nuwe adres: Dept. Weidingsleer U.O.V.S. Bloemfontein.