Soil samples were collected from 8 land use types in Embu to study the effects of land use on soil chemical and physical parameters and on the occurrence of Trichoderma spp. The fungus was recovered from the soil using the dilution plate and soil washing technique.

As the problems of impact assessement are rather intractable, a fairly simple dual approach is proposed. First the major components of environmental impact of current agricultural production systems in Africa (i.e. impact of cropping, livestock keeping, fuelwood and timber extraction and burning) are summarised. Second, "danger zones" in which current and future environmental impacts will be most severe and on which ILCA has focused its problem solving-research is identified.

This report summarizes over 20 years of research on land use change patterns and processes in case study sites across Kenya, Tanzania and Uganda to provide information on the evolution of livestock in the systems. Many of the case study sites cross-ecological gradients, from the Highlands to the lowland savannas, and offer a glimpse of how the mixed crop–livestock, the agro-pastoral and the pastoral systems have evolved in relation to each other.

Records the history of ILCA's involvement in Botswana between 1977 & 1981, w. emphasis on the monitoring of the operational aspects of the Tribal Grazing Land Policy, particularly regarding the implementation of the Second Livestock Development Project, and the monitoring of range, livestock performance, ranch economics, socio-economic activities and the operations of the Nojane ranches; reviews other ILCA activities, particularly research collaboration w. scientists of the Animal Production Research Unit (APRU).