Unruh JD (1995) Pastoralist resource use and access in Somalia: a changing context of
development, environmental stress, and conflict. In: Sorenson J (ed.) Disaster and Development on the Horn of Africa. Macmillan, London

We measured productivity and diversity of annual plant communities in human—made pits and mounds (20 ° 30 ° 100 cm) in the Northern Negev of Israel. We differentiated the species according to propagule size, dispersal mode, and geographical distribution in Israel. Our results in 28 experimental units containing a pit, a mound, and a portion of the undisturbed surrounding "matrix" showed that species richness, total plant density, and biomass yield were higher in the pits and mounds than in the matrix.

Full text of the Convention to Combat Desertification, which was elaborated by the Intergovernmental Negotiating Committee (INCD) and signed in June 1994.Also available from the CCD WWW site in French and English