This paper reviews the studies of property institutions that have been undertaken by researchers affiliated with the International Livestock Centre for Africa (ILCA) since 1980. Particular attention is given to the systems studies and an ongoing study of the impacts of trypanosomiasis control on property institutions. Past and current studies by other workshop participants are mentioned but not reviewed in any detail. The majority of the completed studies have been concerned with two fundamental questions: (1) How do property institutions affect the use and management of resources?

Selection of presentations made at the workshop on "Pastoral systems research in sub-Saharan Africa", describing the framework used by ILCA for pastoral systems research (PSR), examining methods used in the descriptive and diagnostic stage of PSR, and showing how the design and testing procedures are followed in practice; with particular reference to low-altitude aerial surveys, livestock surveys & household studies.

Presents a collection of conference papers defining pastoral systems research; the survey and diagnostic phase of pastoral systems research; ILCA's experience in remote sensing techniques and aerial surveys; survey of vegetation resources; livestock productivity and animal nutrition; pastoral production strategies, wealth effects, household studies, and labour data collection as well as livestock marketing studies.

Presents papers dealing with the use of crop residues as livestock feed in smallholder crop/livestock farming systems, and the role of plant breeding in maintaining or improving their nutritive value. Discusses factors limiting the nutritive value of crop residues, and the effect of genotype and environment on the nutritive value of crop residues. Outlines perspectives and implications for crop improvement programmes. Includes recommendations.

Animal agriculture can add to agricultural development through income generation, intensification, foreign exchange earnings and non-agricultural development. The primary justification for being concerned with animal agricultural in sub-Saharan Africa at present is the need to increase farmer incomes. Technological change is the primary means of raising farmer incomes. However, while new technology is a necessary ingredient in the process of agircultural development, it is not sufficient without conductive policy.

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.

Presents papers discussing the potential for impacts within ILCA's organisational framework and mandate. The introductory paper raises general issues and poses questions that are pursued in the other papers. These papers address the environmental, economic and social components of impact within the organisation. Case studies on ILCA's research on tenure policy and alley farming, forage legumes, animal traction, milk processing, hay making and studies on pricing policies, technology generation and ILCA's research networks are presented in the papers.

The systems of livestock production, marketing and research have been profoundly transformed by recent policies in Central Asia since the break up of the Soviet Union. Decollectivisation of state farms has transferred livestock ownership to new private farming units. These receive little or no state support for inputs, or for processing and selling livestock products. Most livestock-keeping families have much-reduced incomes compared to the Soviet period.