CONTENTS Contributors vii Acknowledgements xi Foreword xiii Introduction xv 1The Potential Use of Waste-stream Products for Soil Amelioration in Peri-urban Interface Agricultural Production Systems 1 P.J.C. Harris, M. AUison, G. Smith, H.M. Kindness and J. Kelley 2Economic, Sociocultural and Environmental Considerations 2.1 The Economic Viability of Organic Waste Composting 2 9 R.G. Niemeyer, H. Litterscheid and S. Sanders 2.2 Assessing Farmers' Perceptions of Organic Wastes as Nutrient Sources 43 P. Drechsel, C. Quansah and S. Asante-Mensah 2.3 Environmental Concerns of Urban and Peri-urban Agriculture: Case Studies from Accra and Kumasi 55 E. Mensah, P. Amoah, P. Drechsel and R.C. Abaidoo 3Turning Urban Waste into Fertilizer for Urban and Peri-urban Farmers: Case Studies from East and West Africa 3.1 Ibadan Turning Municipal Waste into Compost: the Case of Ibadan 69 T. Agbola Urban Vegetable Production in Lagos and Ibadan 82 M.A.O. Oladokun 3.2 Accra Turning Municipal Waste into Compost: the Case of Accra 84 Z. Etuah-Jackson, W.P. Klaassen and J.A. Awuye 3.3 Kumasi Farming Systems and Farming Inputs in and around Kumasi9 6 K. Nsiah-Gyabaah and M. Adam An Integrated Waste Management Strategy for Kumasi 112 L. Salifu 3.4 Dares Salaam Linking (Peri-)urban Agriculture and Organic Waste Management in Dar es Salaam 115 S. Kiango and J. Amend 3.5 Lome Urban Agriculture in Lome 129 M.E.A. SchreursandH. VanReuler Adding Value to Compost from Urban Household and Market Refuse in Lome 133 A. Kessler and J. Helbig 3.6 Optimizing Nutrient Recycling and Urban Waste Management - New Concepts from Northern Europe 137 J. Magid, A. Dalsgaard and M. Henze 4Modelling Urban and Peri-urban Biomass and Nutrient Flows 4.1 Assessing the Potential of Organic Waste Recycling through the Analysis of Rural-Urban Carbon Fluxes 141 C. Binder and N.Patzel 4.2 The Potential of Co-composting in Kumasi - Quantification of the Urban and Peri-urban Nutrient Balance 150 C. Leitzinger 4.3 Estimating Rural-Urban Nutrient Flows for Mega-cities 163 J. Fwrge, J. Magid and E Penning de Vries 4.4 Monitoring Nutrient Flows and Economic Performance in African Farming Systems: the NUTMON Approach and its Applicability to Peri-urban Agriculture 176 H. Van den Bosch, D. Eaton, M.S. Van Wijk, J. Vlaming and A. De Jager 4.5 Definition and Boundaries of the Peri-urban Interface: Patterns in the Patchwork 193 M. Adam 5Urban Agriculture: International Support and Capacity Building in Africa 209 C.J. Sawio, L. Spies and D. Doucoure 6Research and Development Priorities 219 P. Drechsel and D. Kunze Index 225