Describes a streamlined approach to calculating water and salinity balances in three different irrigated areas of Pakistan where salinity is a major problem. Explores the impact of current irrigation and agronomic practices on salinity and suggests corrective measures.

This issue of Unasylva focuses on the challenges facing forestry extension and current attempts to respond to them.

This paper outlines FAO's past and present activities on combating desertification, with particular emphasis on the Near East Region, in an attempt to mobilise all the potential efforts towards the establishment of an adequate strategy to enable this particular part of the world to build…

Le prsent numro d'Unasylva examine les dfis que doit relever la vulgarisation forestire et les efforts dploys actuellement en ce sens.