Forests and plant cover in general contribute considerably to the reduction of the phenomenon of desertification in all its forms and more particularly at the level of water and wind erosion. The national strategy for the development of the forestry and pastoral sector therefore constitutes a major component of the national program to combat desertification. The ten-year program relating to the national strategy for the development of the forest sector, which spans the period 2002-2011, sets itself the main objectives of increasing the rate of vegetation cover, rationally managing the various forest systems and protecting forests and different wild areas. The program aims to create 400,000 ha of forest and pastoral plantations divided into 190,000 ha of forest reforestation and 210,000 ha of pastoral plantations, thus making it possible to achieve a forest cover rate of 16% in 2011. The program must also create windbreaks at the level of the irrigated perimeters at the rate of an average of 3,000 ha/year, i.e. a total of 30,000 ha until 2011, reforest the banks of the wadis and protect the hydraulic infrastructures over an area of 20,000