manihot esculenta 119 starch crops 47 development 23 cultivation 22 marketing 20 processing 20 economics 19 cassava products 16 costs 15 drying 15 processed products 15 productivity 15 research 14 root productivity 13 uses 13 costos 12 mercadeo 12 variedades 12 cultivars 11 development projects 11 industrialization 11 production 11 proyectos de desarrollo 11 socioeconomic aspects 11 technology 11 cassava chips 10 cultivo 10 dried roots 10 secamiento 10 pests 9