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Product Qty (kg/yr) Calories/d Protein (g/d) Fat (g/d) % imports

Cereals. 127.3. 1057. 27.6. 7.6. 17.15. Root & Tuber. 163.1. 438. 4.4. 0.7. 0.17. Pulses. 9.5. 88. 5.7. 0.5. 3.49. Oil Crops. 5.3. 63. 2.8. 4.9. 0.95. Fruits. 48.5. 85. 0.9. 0.3. 0.88. Per caput food supply in sub Saharan Africa (SSA) in 2000.

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Product Qty (kg/yr) Calories/d Protein (g/d) Fat (g/d) % imports

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  1. Cereals 127.3 1057 27.6 7.6 17.15 Root & Tuber 163.1 438 4.4 0.7 0.17 Pulses 9.5 88 5.7 0.5 3.49 Oil Crops 5.3 63 2.8 4.9 0.95 Fruits 48.5 85 0.9 0.3 0.88 Per caput food supply in sub Saharan Africa (SSA) in 2000 Product Qty (kg/yr) Calories/d Protein (g/d) Fat (g/d) % imports Ortiz from FAOSTAT

  2. Cereals 13.66 11.26 9.96 -5.00 188.28 Root & Tuber 3.49 3.55 12.82 16.67 38.09 Pulses -6.86 -6.38 -8.06 0.00 89.81 Oil Crops -20.90 -20.25 -9.68 -25.76 -17.33 Fruit -10.68 -9.57 -10.00 -25.00 56.35 Change in per caput food supply (%) in SSA from 1961 to 2000 Product Qty (kg/yr) Calories/d Protein (g/d) Fat (g/d) % imports

  3. Root & Tuber 163.1 438 4.4 0.7 0.17 Cassava 103.1 275 1.9 0.4 0.05 Yams 28.2 77 1.2 0.2 0.01 Sweetpotato 13.9 36 0.5 0.1 0.01 Potato 6.5 13 0.3 0 3.98 Others 11.4 36 0.5 0 0.14 Per caput food supply from roots and tubers in SSA in 2000 Product Qty (kg/yr) Calories/d Protein (g/d) Fat (g/d) % imports

  4. Soil Fertility • IITA and its research for development partners are working towards the development of productive short fallow systems • leguminous cover crops • leguminous food crops in intercropping • studies on the role of mycorrhizal fungi in the nutrition of yam plants • screening of yam germplasm for nutrient use efficiency • symptoms of nutrient deficiency in yams recently published for use in field diagnosis (Shwachi et al. 2004) • review of fertilizer application in yam based systems in West Africa to be published soon

  5. Key Challenges to Yam Production • Planting materials – high cost and health status • High labour requirement • Germplasm –more productive varieties required • Declining soil fertility • Diseases and Pests (including weeds) • Post-harvest handling and processing • Expanded and diversified market opportunities

  6. Producing Yam Seed Tubers IITA scientists and their partners have developed: • Rapid methods for mass propagation of high quality seed tubers • Methods for ensuring good seed tuber health in storage

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