Book excerpt: Technological constraints and opportunities in relation to class of livestock and production objectives; Trhe influence of socioeconomic factors on the availability and utilization of crop residues as animal feeds; Crop residues in Tropical Africa: trends in supply, demand and use; Cowpea and its improvement: key to sustainable mixed crop/livestock farming systems in West Africa; Dynamics of feed resources in mixed farming systems in Southeast, South Asia; West/Central Asia-North Africaand Latin America; Crop residues as a strategic resource in mixed farming systems; Alternatives to crop residues as feed resource in mixed farming systems; Alternatives to crop residues for soil amendment; Crop residues for feeding animals in Asia: technology development and adoption in crop/livestock systems; The national perspective: a synthesis of country reports presented at the Workshop.