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of degradation are appropriate under which conditions?<br />

These rhetorical questions serve to illustrate the po<strong>in</strong>t that it is hard to measure degradation<br />

<strong>and</strong> hence susta<strong>in</strong>ability. Equat<strong>in</strong>g evidence of degradation to unsusta<strong>in</strong>able l<strong>and</strong> use is the<br />

common approach but should be treated with caution. There is <strong>in</strong>sufficient agreement on<br />

measur<strong>in</strong>g either <strong>and</strong> until robust, universally accepted <strong>and</strong> measurable def<strong>in</strong>itions are<br />

found it is probably unwise to make statements about susta<strong>in</strong>ability (or the lack of it) <strong>in</strong><br />

communal areas.<br />

It is clear from this study that all is not as bad as it appears <strong>in</strong> the communal rangel<strong>and</strong>s.<br />

However, it is not the <strong>in</strong>tention to create the impression that all is well, because some areas<br />

are <strong>in</strong>deed <strong>in</strong> a poor or degraded condition. This may <strong>in</strong>dicate that <strong>in</strong> some <strong>in</strong>stances the<br />

ecosystems could be gradually deteriorat<strong>in</strong>g. However, the data presented here may<br />

contribute to prevent<strong>in</strong>g people from mak<strong>in</strong>g sweep<strong>in</strong>g <strong>and</strong> often unfounded statements<br />

about systems which are healthier than we perceive them to be, although they may not<br />

always be aesthetically pleas<strong>in</strong>g. It does appear that a number of holy cows may have bitten<br />

(the communal rangel<strong>and</strong>?) dust.<br />

The social responsibility of susta<strong>in</strong>able resource use by rural l<strong>and</strong> users needs no apology<br />

or explanation. All users of the natural resources of the country share it with previous,<br />

present <strong>and</strong> future generations <strong>and</strong> do not have exclusive rights to it. The challenge to<br />

scientists is to determ<strong>in</strong>e the susta<strong>in</strong>ability of communal l<strong>and</strong> use <strong>and</strong>, if necessary, then to<br />

develop susta<strong>in</strong>able community-friendly l<strong>and</strong> use options.<br />

Acknowledgements<br />

The Foundation <strong>for</strong> <strong>Research</strong> Development <strong>and</strong> UK Royal Society <strong>for</strong> fund<strong>in</strong>g <strong>and</strong><br />

Well<strong>in</strong>gton Sibanga, Mweli Nyanga <strong>and</strong> Dumi Pepe <strong>for</strong> technical support.<br />

References<br />

Abel, N.O.J. <strong>and</strong> Blaikie, P.M., 1989. L<strong>and</strong> degradation, stock<strong>in</strong>g rates <strong>and</strong><br />

conservation policies <strong>in</strong> the communal rangel<strong>and</strong>s of Botswana <strong>and</strong> Zimbabwe. L<strong>and</strong><br />

Degradation <strong>and</strong> Rehabilitation, 1: 102-123.<br />

Acocks, J.P.H., 1975. Veld types of South Africa. Memoirs of the Botanical Survey of<br />

South Africa , pp 40.<br />

Behnke, R.H, Scoones, I. <strong>and</strong> Kerven, C.(eds), 1993. Range ecology at disequilibrium.<br />

Overseas Development Institute, London. Russel Press Ltd, Nott<strong>in</strong>gham.<br />

Bransby, D.I. <strong>and</strong> Ta<strong>in</strong>ton, N.M., 1977.The disk pasture meter: possible applications <strong>in</strong><br />

graz<strong>in</strong>g management. Proc. Grassl. Soc. Sth. Afr., 12: 115-118.<br />

Engels, E.A.N., 1983.Voed<strong>in</strong>gsnavors<strong>in</strong>g met die weidende dier. S. Afr. J. Anim. Sci., 13:<br />

292.<br />

Hodgson, J., 1981. Influence of sward characteristics on diet selection <strong>and</strong> herbage <strong>in</strong>take<br />

by the graz<strong>in</strong>g animal. In: Nutritional limits to animal production from pastures (Part 4).<br />

Proceed<strong>in</strong>gs of an International Symposium held at ST. Lucia, Queensl<strong>and</strong>, Australia,<br />

August 24-28, 1981. Ed by: J.B. Hacker, Commonwealth Agricultural Bureaux.<br />

26

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