This issue of Unasylva focuses on the challenges facing mountain development into the twenty-first century.

...The main purpose of this paper is to examine legal measures taken to recognize
indigenous groups and provide for their ongoing operation; the paper starts, therefore, from an
underlying assumption that indigenous groups have continued relevance to the needs and wishes
of the people who operate within them. Nevertheless, while it is beyond the scope and purpose of
the paper to explore this complex issue in any depth, it may be useful to present – however briefly
– some of the arguments made for and against the preservation of indigenous groups. In the

Aujourd'hui, prs de 30 ans aprs la publication de The tragedy, of the commons, l'exprience ngative de l'expropriation des ressources communautaires qu'ont faite les gouvernements a entran un rexamen du potentiel de la gestion collective; et la base de donnes sur les tentatives pratiques de rtablir ou de renforcer les systmes de gestion des ressources communautaires ne cesse d'augmenter. Le prsent numro d'Unasyva est ax sur ces deux aspects relatifs aux ressources forestires.

Now, nearly 30 years after the publication of The tragedy of the commons, the negative experiences of governments with expropriation of common property resources have led to a reexamination of the potential of collective management; and there is a growing database of information on practical experiments with the restoration or strengthening of common property resource management systems. This issue of Unasylva focuses on both these aspects with respect to forest resources.

Actualmente, casi 30 aos despus, la experiencia negativa de los gobiernos con la expropiacin de recursos de propiedad comn ha hecho que se vuelvan a examinar las posibilidades de una gestin colectiva, y ha permitido disponer de una creciente informacin sobre experimentos prcticos con respecto a la restauracin o al refuerzo de los sistemas de gestin de estos recursos. En este nmero de Unasylva se insiste en ambos aspectos en relacin a los recursos forestales.

All land in Zambia is vested in the president, in trust for the people of Zambia, under the Land (Conversion of Titles) Act, 1975 (see p.16), SECTION4.The president has delegated landadministration to the Commissioner of Lands under Statutory Instrument No. 7 of 1964 and GazetteNotice No. 1345 of 1975, as amended. Land in Zambia is divided into State (formerly crown),Reserve, and Trust Lands, as well as park reserves.

Los tcnicos forestales y los administradores de recursos naturales entendieron muy poco y mal los mltiples usos que los campesinos hicieron de las formaciones forestales en el curso de los milenios, ampliamente documentados en un artculo sobre las tcnicas de ordenacin de tierras arboladas aparecido en el nmero 160 de Unasylva.