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179 Acknowledgements I would like to express my sincere gratititude to the Volkswagen foundation for providing the financial support for my PhD studies. My thanks are also directed to Geert de Snoo, Hans de Iongh and Gerard Persoon for accepting to supervise me and for the enormous efforts made despite their tight programs to assist me in realising this work. I wish to thank the administration of the University of Dschang in general and the Faculty of Agronomy and Agricultural Sciences in particular for granting me the time factor required to complete this work. This work was carried out as part of the project on Human mobility, Networks and Institutions for the Management of Natural Resources in Africa. I wish to thank the project management board for their cooperation and assistance: Michael Bollig, Mirjam de Bruijn, Francis Nyamnjoh, Paul Hebinck, Tangie Fonchingong, Ulrike Wesch, Webster Wande, Martin Solich. I very much benefited through interacting with the other students of the project : Emmanuel Hanai, Patience Mutopo, Florian Silangwa, Pinimidzai Sithole, Evelyne Teghomo, Anne-Christina Achterberg-Boness and Willem Odendaal I am very grateful to the staff and graduate students of the Institute of Environmental Sciences (CML) and the African Studies Centre (ASC), of Leiden University for their different contributions. Particular thanks go to Ton Dietz, Maarten van’t Zelfde, Jory Sjardijn, Esther Philips, Susanna van den Oever, Jose Brittijn and Maaike Westra. I wish to thank Joseph Seh, Joseph Lumumba and Francis Ndi Wepngong for their friendship during my visits to the Netherlands. I am very cognisant of the contributions of Dr. Loius V. Verchot, Annelies Bus and Dr. Nico de Ridder as I journeyed through thick and thin in quest for this goal. Many thanks go to the farmers, extension workers, and students of FASA and FS of the University of Dschang who participated in the research in data collection . Special thanks go to Walter Tacham for his tremendous contribution in the biodiversity study. 180 The Interactions of Human Mobility and Farming Systems Finally, I thank my wife, children and relatives for their support. This work is dedicated to my parents (Tankou Alphonse and Ngifor Agnes) of blessed memory. ...

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