Methods used for rehabilitating old cacao farms in Nigeria. Proceeding.

G G Paulus, A M Muller,L A Rocha Barcellos,B T Kang,G F Wilson,T L Lawson,Z Calle Diaz, L Piedrahita,M R Guariguata,L A R Barcellos,D A Beck, H Hambly, T Onweng Angura, Eds,J Collinet,Centro Agronomico Tropical De Investigacion Y Ensenanza,M Mazariego, Ministerio De Agricultura Y Ganaderia,Nick Abel,M J Drinkwater, J S I Ingram,J C Okafor,R T Prinsley,O Fajardo, Carlos Bustamante,Ivan J Fernandez,B Cumba, F Camacho Morfin, V Gonzalez Kladiano,L T Szott,M J Mazzarino, M A Jimenez,D Kass

mag（1969）

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ecological succession,indicator plants,biomass,metal,regeneration,soil pollution,reclamation,tillage,agroforestry,cycling,nitrogen,soil management,endangered species,environmental impact,organic matter,resource management,weed control,nutrients,soil biology,crops,elements,crop yield,planting,recycling,soil degradation,sol,soil organic matter,plant protection,sustainability,crop residues,metals,green manures,crop rotation

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