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3. Evaluation of belt transect sampling to determine tree density in a semi-arid Acacia Karoo savanna;Hardy,1992
4. The comparative yield method for estimating dry matter yield of pasture;Haydock;Aust. J. exp. Agric. Anim. Husb.,1975
5. A synthesis of field experiments concerning the grass layer in the savanna regions of southern Africa;O’conner,1985