ABSTRACTED FROM IIED WEBSITE INTRODUCTION: One of the outputs of a research project considering shifting cultivation in Thailand, Lao PDR and Vietnam. It considers the dynamics of shifting cultivation and alternative land use systems in the context of highland development in Thailand, gathered in order to provide up-to-date information to policymakers. The study includes examination of national policies relating to highland areas and the impacts of such policies on local communities and land use patterns.

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.