The Cassava Plant

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Cassava (Manihot esculentum) is the only cultivated only food crop species in its genus (Fauquet 1990). It has many names including mogo (Africa), manioc, yucca, and tapioca (wikipedia). Cassava is a woody perennial shrub that is never grown, as a crop, from further than 30°N and 30° S of the equator (Cock 1985). The crop is much more limited in range by rainfall rather than temperature. The cassava plant, under cultivation, can grow to 5 to 12 feet, but in abandoned fields could grow up to 18 feet (Jones 1959). The leaves are large and palmate, growing between 3 to 11 lobes, varying on the region of attachment (Nartey 1978). They grow only toward the end of the branches; locations of earlier leaves are marked by a series of alternating nodes along the branch (Jones 1959). As the plant grows, the main stem forks, usually into three branches, and in their turn the lesser branches divide similarly (Cock 1985). The stems are woody and brittle, whose diameter varies with age, averaging about 3 to 6 cm (Nartey 1978).
The cassava plant is mainly cultivated for its tuberous starchy root. The crop is a major source of calories, following maize, sugar (cane and beet), and rice, for over 400 million people in tropical countries in Asia, Latin America, and Africa (El-Sharkway 1993). Cassava provides 38.7%, 11.7%, and 6.7% of the total caloric intake in Africa, Latin America, and the Far East, respectively (Nartey 1978). Cassava has high dry weight proportion, between 30% and 40%, and starch and sugar make up 90% of the dry matter (Cock 1958). Cassava is relatively rich in calcium and ascorbic acid (vitamin c) and contains significant quantities of thiamine, riboflavin, and niacin (Jones 1959). Diets, which consist mainly of cassava, may lea...

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... by Portuguese trades migrating between Brazil and the West African coast. Evidence reveals that cassava was introduced as early as the 1588 to the Congo. The Portuguese brought cassava from Brazil to their trading stations along the coast from present day Ghana to Somalia (Jones 1959). Through multiple sites of introduction cassava quickly spread throughout Angola, Zaire, Congo, Gabon, and Cameroon.
Cassava was independently introduced into East Africa and Madagascar by the middle of the eighteenth century. A hundred years later
In Africa,
Even though the exact location of origin is still under debate, there is no debating the importance of cassava to in daily caloric intake for many of the tropical nations. It is clear that cassava was introduced to Africa, India, countries of South East Asia, and the Pacific Islands all originate from Brazil (Thampan 1979).

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