Purpose: Agricultural extension services in poor countries often identify opinion leaders based on criteria such as wealth and social status. We explore the effectiveness of this top-down approach by analysing the role of so-called model and nodal farmers in the diffusion of malt barley in a highland community in Ethiopia. Research approach: We…

Purpose: The article reports effects on livelihoods of a participatory technology development effort in Benin and Ghana (2001-2006), five years after it ended. Design: The study uses data from all smallholders who participated in seven experimental groups, each facilitated by a PhD researcher. Baseline data and controls were not available. In…

The University of Minnesota trapped and killed birds to reduce bird damage to research grain plots. When the Animal Rights Coalition demanded the practice be stopped, the situation became a public controversy. Presents an abridged form of this case as a focus for consideration of research methods, interest group agenda, and the universities' role…

Described are the economic and agricultural issues surrounding the cultivation of desert plants, principally the jojoba, as a source of fuel. The article examines the environmental impacts of an industry based on arid-region cultivation of such plants. (RE)

Elucidates strategies for applying microbiological techniques to traditional agricultural practices. Discusses the manipulation of microorganisms that live with plants and also the problems involved in the introduction of new genes into crop plants by recombinant DNA methods. (CS)