Se realizó un estudio comparativo entre un sistema de producción de cereales de secano de conservación y otro tradicional, con el fin de evaluar los efectos a largo plazo de diferentes prácticas culturales en el combate a la desertificación. El sistema de conservación ha recurrido a siembras directas a lo largo de 10 años consecutivos, mientras que el tradicional al laboreo del suelo. En un suelo tipo Chromic Vertisol en Portugal se evaluó a partir de imágenes en 2D, la continuidad del espacio poroso y, por tanto, la dinámica del agua del suelo.

El artículo tiene el objetivo de exponer la situación socioambiental actual y su vínculo con las prácticas sociales de producción propias del sistema productivo ovino extensivo en Santa Cruz, Patagonia austral, Argentina. El emergente más significativo que se puede apreciar actualmente es la desertificación y su impacto en los diferentes niveles del sistema socioproductivo.

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This paper reports on a workshop held in Ethiopia in 2004, targeting stakeholders involved in implementing Ethiopia’s National Action Plan (NAP) for the United Nations Convention to Combat Desertification (UNCCD). The workshop was based on international, national and regional experiences, principles and practices related to dryland management and combating desertification to the development of community driven processes.

This report presents a panorama of the environmental status of the world’s deserts: their location and extent, uniqueness and vulnerability, biodiversity and natural resources. The report provides a balanced picture of deserts as ecosystems which form a special part of the world’s natural and cultural heritage, and not simply as land that is the end result of the process of desertification.The Global Deserts Outlook is the first thematic assessment report in the Global Environment Outlook (GEO) series of the United Nations Environment Programme (UNEP).

It is clear from the failure of our efforts in many countries to halt the desertification process - deserts are now advancing at a rate of nearly 15,000,000 acres a year worldwide (Worrall 1984) (that something was missing in our knowledge of the problem). Four discoveries have been made that enabled us to design a simple holistic model to manage resources successfully in a sustained and economic manner.

This paper seeks to analyse some of the problems of degradation persisting in the dryland regions with particular reference to Sub-Saharan Africa, and describe the processes that aim to tackle them.It identifies the threat to dryland regions as a complex mixture of degrading soils, continuous exposures to frequent droughts and political and economic marginalisation which is putting poor people living in the drylands at risk.

The objectives of this study are to analyze and synthesize the experience of the World Bank and other agencies in dryland management, with special emphasis on Africa.Recommendations are provided on "good policies and practices" in drylands management, which can support actions to fulfil obligations arising from the United Nations Convention to Combat Desertification (CCD) for member countries and for international organizations, such as the World Bank.