Changes in land use on farms at Hengelo were remarkably more frequent than was usually supposed in such areas. The larger farms had a general tendency to decrease in area, while the smaller farms tended to increase in area.

This paper serves three purposes. First, it gives a short introduction to the concept of sustainability in relation to land use. Since the Brundtland report it has become clear that sustainability is a dynamic concept that changes when conditions in society change. Moreover, it is easier to assess what is `unsustainable¿ than what is `sustainable¿. But that will not suppress the demand for sustainable developments.

Evaluation of effects of agri-environmental measures on rangeland degradation in two less-favoured areas in Portugal

Nadia Manuela Jones

The study focuses on analyses of major development problems related to livelihood and natural resource management in the Northern Uplands of Vietnam (NUV). The study was conducted in Suoi Con, a small agro-forestry watershed with the total area is about 1760 ha. The watershed is characterized by a high poverty rate and low agricultural production and household income. Livelihood of the households is dependent upon self-sufficient agricultural production, which accounts for nearly 80% of the total production value.