Proceedings of the seminar on evaluation and mapping of tropical African rangelands, particular categories of rangeland survey and evaluation, review of experiences; site development, parameters and methods; sampling and data processing, cartography, with recommendations and guidelines for the fu

Recommendations for preservation and improvement of sub-Saharan rangelands, and for training people in range management and animal production.

The purpose of this soils bulletin is to summarize the soil erosion problem and to focus attention on remedial measurs available with particular reference to the lands under traditionnal forms of agriculture in the developing countries.

This special issue of Unasylva has two main objectives.