Roots and Tubers for the 21st Century; Trends, Projections, and Policy Options

v Tables 1. Production of, edible energy and protein in, and value of major roots and tubers and cereals in developing countries, 1995–97 2 2. Percentage of calories and protein from consumption of roots and tubers as food, 1983 and 1996 3 3. Food and feed utilization of roots and tubers by region, 1983 and 1996 8 4. Per capita consumption of roots and tubers as food and feed, 1983 and 1996 9 5. Annual growth rates in area planted with and production of roots and tubers by commodity and region, 1983–96 15 6. 24. Main agronomic characteristics of principal roots and tubers 52 25. Raw material characteristics of roots and tubers 52 26. Key IMPACT parameters for selected countries and regions 53 Illustrations 1. Edible energy produced by major roots and tubers and cereals 3 2. Production growth rates of major roots and tubers and cereals, developing countries, 1961–63 to 1995–97 5 3. Per capita food and feed consumption of roots and tubers, selected countries and regions, 1983 and 1996 9 4a. The relationship between per capita potato consumption and income 10 4b. The relationship between per capita cassava consumption and income 10 4c. The relationship between per capita sweetpotato consumption and income 11 5. Location of root and tuber production, 1996 16 6. Relative importance of major roots and tubers in countries and regions, 1996, based on production volumes 17 Boxes 1. The Variety of Roots and Tubers 2 2. Case Studies on Factors Influencing R&T Use 12 3. The IMPACT Model 24 vii Foreword The tremendous importance of roots and tubers as a source of income for poor farmers and of food for the rural and urban poor is often overlooked in the debate about improving food security and eradicating poverty in developing countries. Hopefully, the analyses in this report, prepared jointly by the International Potato Center (CIP) and the International Food Policy Research Institute (IFPRI), will help give these crops appropriate consideration in future deliberations about the global food system at the national and international levels and thereby improve efforts to ensure access to sufficient food and income for all people. The assessment of past trends, future prospects, and policy options reported here stems from the tradition of joint studies of roots and tubers in developing countries by the centers of the Consultative Group on International Agricultural Research (CGIAR). While this report builds on that previous …