Growth and Nutrient Use Efficiencies of Yams (Dioscorea spp.) Grown in Two Contrasting Soils of West Africa

Figure 3

Relationships between the maximum leaf area index and the fresh tuber yield over the growing season of Dioscorea alata and D. rotundata grown with and without fertilizer application in a forest (fertile) and a savanna (infertile) sites in Central Cote d’Ivoire in 2002.