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Smallholder farmers in the region of Sub-Saharan Africa have begun to participate in global supply chains through applying contract farming (CF). The main aims of this paper are: to present a typology of CF and to describe the contract farming in Sub-Saharan African countries. This article has synthesised the fi ndings from contract farming agreements in Sub-Saharan African countries to form a conceptual framework of the determinants and dynamics of farmers’ participation in CF agreements. This article can be treated as an introduction to a complex comparative study of the Sub-Saharan African CF schemes and may spur further integrative analysis of the transformation in agriculture in developing countries.
There are various biomass energy technologies with imbalanced application status spread all over Sub-Sahara Africa. Currently, some biomass technologies have been developed maturely in the market such as biogas, that can be economically competitive, commercially developed, and applied in large scale, while other technologies are in the early stage of commercial applications, that need subsidies and other financial incentives to encourage them in the market. These include biomass power, biomass pallet fuel, biofuels from non-grain feedstock, etc. There are also many emerging biomass technologies which are at R&D and demonstration stage and are expected to develop into industrial and commercial applications, such as biological ethanol fuel from cellulose and biodiesel from oil plants. Due to the differences in terms of technology maturity, development stage, market competitiveness, and future perspectives of the various biomass technologies, the obstacles can be different, the needed incentives also vary. It is an important task for Sub-Sahara African Countries to study and design a biomass energy development program to ensure implementation of the region’s biomass energy development objectives. The biomass energy development program in Sub-Sahara Africa should include assessment of various biomass technology status and objectives, development of approaches in biomass technology research and development, pilot projects, demonstration, and application promotions, and identify supporting incentives in techniques and regulations.
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Epidemiology of Salmonella and Salmonellosis

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The prevalence of enteritis and its accompanying diarrheal and other health challenges linked to infections with Salmonella has continuously plagued sub Saharan Africa. In Nigeria, typhoid fever is among the major widespread diseases affecting both young and old as a result of many interrelated factors such as inadequate sanitaion, indiscriminate use of antibiotics and fecal contamination of water sources. Morbidity associated with illness due to Salmonella continues to increase with untold fatal consequences, often resulting in death. An accurate figure of cases is difficult to arrive at because only large outbreaks are mostly investigated whereas sporadic cases are under-reported. A vast majority of rural dwellers in Africa often resort to self medication or seek no treatment at all, hence serving as carries of this disease. Non typhoidal cases of salmonellosis account for about 1.3 billion cases with 3 million deaths annually. Given the magnitude of the economic losses incurred by African nations in the battle against salmonella and salmonellosis, this article takes a critical look at the genus Salmonella, its morphology, isolation, physiological and biochemical characteristics, typing methods, methods of detection, virulence factor, epidemiology and methods of spread within the environment.
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