Introduction - Economic and ecological aspects of diversification of tropical tree crops; Francois Ruf and Goetz SchrothChapter 1. Diversification of cocoa farms in Cote d'Ivoire: complementarity of and competition from rubber rent; Francois RufChapter 2. Coconut farmers and lethal yellowing disease: a case study in two villages in Ghana's Central region; Jean Ollivier, Philippe Courbet and Richard DemocriteChapter 3. From the coffee-cocoa combination to oil palm cycles: the case of Dabou and Aboisso in Cote d'Ivoire; Vylie Tientcheu Sayam and Emmanuelle CheynsChapter 4. Development of oil palm plantations and orange groves in the heart of the cocoa territory in eastern Ghana; Isabelle Michel-Dounias, Laure Steer, Emmanuelle Giry, Claude Jannot and Jean-Marie KalmsChapter 5. Rubber in the kingdom of cocoa. The south-west of Cote d'Ivoire in the 1990s; Armand Yao and Kouame FikoChapter 6. Rubber: natural rent, capitalization rent? West-central Cote d'Ivoire and southern Thailand; Francois Ruf, Benedicte Chambon, Chaiya KongmaneeChapter 7. From Firestone to Michelin, a history of rubber cultivation in a cocoa-growing country: Ghana; Emmanuel Akwasi Owusu and Francois RufChapter 8. Extensive fish farming, a complementary diversification of plantation economies; Marc OswaldChapter 9. Determinants in the choice of perennial crops in diversified production systems of rubber growers in south-western Cameroon; Benedicte Chambon and Simon Gobina MokokoChapter 10. Socio-economic conditions of horticultural diversification in cocoa production systems in southern Cameroon; Ludovic Temple and Jules-Rene Minkoua NzieChapter 11. Agroforestry-based diversification for planting cocoa in the savannah of central Cameroon; Patrick Jagoret, Frank Enjalric and Eric MalezieuxChapter 12. Diversifying Central American coffee agroforestry systems via revenue of shade trees; Philippe Vaast, Mario Martinez, Axelle Boulay, Benito Dzib Castillo and Jean-Michel HarmandChapter 13. Coconut- and cocoa-based agroforestry systems in Vanuatu: a diversification strategy in tune with the farmers' life cycle; Laurene Feintrenie, Frank Enjalric and Jean OllivierChapter 14. The place of cocoa and coconut cultivation in family plantations in peninsular Malaysia; Pierre Dupraz and Murielle MorissonChapter 15. Diversification and perennial-crop cycles in Aceh, Indonesia; Florie Paul, Francois Ruf and Yoddang