Over the past 30 years, the natural environment of the Asia-Pacific region has been subjected to increasing degradation of both land and water resources thereby threatening livelihoods, food security, people's health and long-term sustainable development. Pressures on these resources are more severe compared to other regions in the world. Some 850 million hectares, representing more that 28 percent of the region's land area, are affected by some form of land degradation.

This report summarizes the findings of the e-mail conference that took place from 9 October to 4 November 2002 and which was organized by the Land Degradation Assessment in Drylands project (LADA). The report contains exchanges of views on data sets and methods that may be used to assess land degradation and a discussion on the biophysical, socio-economic and institutional indicators that explain the root causes, driving forces, status, impact and reponses to land degradation at various scales.

Land degradation in the tropics is strongly associated with human population growth. The latter phenomenon is quite marked in humid areas and in the temperate highlands (Jahnke 1982). Notably in the plateaux of Sub-Saharan Africa and Asia, several pastoral systems have gradually evolved into mixed farming, in order to cope with such pressure (Ruthenberg, 1980). Land is more intensively utilized as population density increases since mixed systems are more efficient than specialized crop or livestock systems (McIntire et al.,1992). In fact, livestock crop integration allows:

This publication has been prepared as a background paper in view of the UN conference on the human environment that was held in Stockholm in 1972. This background document had contribution from UNESCO, IAEA and WHO. While the demand for land for land increases at a very rapid rate through population growth, technological progress and industrial development, soil resources remain fixed. The maintenance of their productivity is therefore of paramount importance.

This document is the second part of a two part manual on local level assessment of land degradation and sustainable land management:

? Part 1 ? Planning and Methodological Approach, Analysis and Reporting

? Part 2 ? Field Methodology and Tools

The two parts should be used together as Part 1 provides the background information for the conduct of the methods and tools that are provided in Part 2.

This guidelines booklet is addressed to the LADA partner countries and, more in

general, to the increasing number of countries which are expressing their interest in

implementing the LADA approach for mapping Land Degradation.

The specific objective is to provide guidelines for the identification, selection and

description of nationally based indicators of land degradation.

The LADA approach is well defined by a range of specific documents and manuals.

The National indicators common to all countries are based on the LADA-Wocat QM

Land degradation is a serious problem that crosses national borders, ecological zones and

socio-economic levels. It can be especially devastating for the world’s poorest people living

in dryland areas. The Land Degradation Assessment in Drylands (LADA) project, executed

by FAO with funding from UNEP, GEF and others, assesses the causes and impacts of

land degradation at global, national and local levels in order to detect hot spots and identify

remedial measures. LADA approaches land degradation as a biophysical, social, economic

The current volume presents the Proceedings of an important meeting entitled "Regional Expert Consultation on Land Degradation, Plant, Animal and Human Nutrition: Inter-relation and Impact". This scientific gathering managed to have a group of soil scientists/plant nutrition specialists, animal nutrition and medical doctors/human nutrition specialists to discuss these inter-related issues.

La présente loi fixe les modalités et les conditions de l’expropriation de droit commun; l’expropriation des terrains ruraux (absence de mise en valeur); le déguerpissement; alignation-servitudes d’utilité publique; et les cas de constatation des droits coutumiers.