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The increased importance of urban agriculture in developing countries suggests reconsidering some innovation adoption opportunities and challenges, particularly soil fertility inputs. In sub-Saharan Africa, urban horticulture uses a high level of soil inputs like inorganic fertilizers, while local composts are far less common. Yet, municipal solid wastes provide high quantity of organic matter, a major component of compost. Our study aimed to determine if urban horticulture in sub-Saharan towns can provide incentives for compost adoption among farmers. To this end, we surveyed 242 farmers in Yaoundé, the capital of Cameroon in the Central Province, and in Bafoussam, a city in the West Province. We used an Ordered Logit Model to test four soil input modalities adopted by farmers and ranging from no soil inputs, composts only, composts and inorganic fertilizers, and inorganic fertilizers only. Our results revealed that 36% of farmers adopt an exclusive or mixed use of compost. Inorganic fertilizer expenditures, vegetable production, land ownership, and land distance simultaneously and significantly influence the four soil input alternatives. Urban horticulture provides the prerequisites for compost adoption in sub-Saharan Africa. We suggest several recommendations for implementation of a waste recycling commodity chain dedicated to agriculture. (Résumé d'auteur

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International symposium: Urban and peri-urban horticulture in the century of cities 38 • Versailles area (France): recycling stable manure and wastewater treatment sludge on cultivated plots • Réunion Island (France, Indian Ocean): organizing and assessing the recycling of various wastes at a territory level The expected result to be delivered when the project is completed is a generic methodology that will make it possible for agronomists working with rural stakeholders to create highly efficient cropping and farming systems based on the use of a wide range of organic wastes.

Municipal solid waste management is one of the global challenges that the world is facing today as countries make strides towards the Millennium Development Goals. The aim of this paper is to identify the most appropriate municipal solid waste management strategy in Yaoundé. The tool used in this study is the Analytic Hierarchy Process (AHP), one of the multi-criteria decision-making techniques. Based on the synthesis of the decision/policy makers' judgements elicited, the Sustainable Development and Waste Service Quality criteria are identified as the priority objectives that should be applied for the municipal solid waste management strategy in Yaoundé, meanwhile the alternatives Pre-collection and Selective Collection are suitable actions to be integrated into the current municipal solid waste management strategy in Yaoundé.

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