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Kola nut
The kola nut (Mandinka: kuruwo, Yoruba: obi, Dagbani: guli, Hausa: goro, Igbo: ọjị, Sängö: gôro, Swahili: mukezu) is the seed of certain species of plant of the genus Cola, placed formerly in the cocoa family Sterculiaceae and now usually subsumed in the mallow family Malvaceae (as subfamily Sterculioideae). These cola species are trees native to the tropical rainforests of Africa. Their caffeine-containing seeds are used as flavoring ingredients in various carbonated soft drinks, from which the name cola originates.
About 5 centimetres (2 in) across, the kola nut is a nut of evergreen trees of the genus Cola, primarily of the species Cola acuminata and Cola nitida. Cola acuminata, an evergreen tree about 20 meters in height, has long, ovoid leaves pointed at both the ends with a leathery texture. The trees have cream-white flowers with purplish-brown striations, and star-shaped fruit consisting of usually five follicles. Inside each follicle, about a dozen prismatic seeds develop in a white seed-shell. The nut has a reddish or white color flesh on the inside, and has a sweet and rose-like aroma.
Kola nuts contain about 2–4% caffeine and theobromine, as well as tannins, alkaloids, saponins, and flavonoids.
Preliminary studies of phytochemicals in kola nut indicate the presence of various constituents: caffeine (2–3.5%), theobromine (1.0–2.5%), theophylline, methylliberine, polyphenols, catechins, and phlobaphens (kola red), among others.
Originally a tree of the tropical rainforest, it needs a hot humid climate, but can withstand a dry season on sites with a high ground water level. It may be cultivated in drier areas where groundwater is available. C. nitida is a shade bearer, but develops a better spreading crown which yields more fruits in open places. Though it is a lowland forest tree, it has been found at altitudes over 300 m on deep, rich soils under heavy and evenly distributed rainfall.
Regular weeding is necessary, which can be performed manually or through the use of herbicides. Some irrigation can be provided to the plants, but it is important to remove the water through an effective drainage system, as excess water may prove to be detrimental for the growth of the plant. When not grown in adequate shade, the kola nut plant responds well to fertilizers. Usually, the plants need to be provided with windbreaks to protect them from strong gales.
Kola nuts can be harvested mechanically or by hand, by plucking them at the tree branch. Nigeria produces 52.4% of worldwide production followed by the Ivory Coast and Cameroon. When kept in a cool, dry place, kola nuts can be stored for a long time.
The crop's value makes it one of the most important indigenous cash crops in West Africa and is used as a means of social mobility.
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Kola nut
The kola nut (Mandinka: kuruwo, Yoruba: obi, Dagbani: guli, Hausa: goro, Igbo: ọjị, Sängö: gôro, Swahili: mukezu) is the seed of certain species of plant of the genus Cola, placed formerly in the cocoa family Sterculiaceae and now usually subsumed in the mallow family Malvaceae (as subfamily Sterculioideae). These cola species are trees native to the tropical rainforests of Africa. Their caffeine-containing seeds are used as flavoring ingredients in various carbonated soft drinks, from which the name cola originates.
About 5 centimetres (2 in) across, the kola nut is a nut of evergreen trees of the genus Cola, primarily of the species Cola acuminata and Cola nitida. Cola acuminata, an evergreen tree about 20 meters in height, has long, ovoid leaves pointed at both the ends with a leathery texture. The trees have cream-white flowers with purplish-brown striations, and star-shaped fruit consisting of usually five follicles. Inside each follicle, about a dozen prismatic seeds develop in a white seed-shell. The nut has a reddish or white color flesh on the inside, and has a sweet and rose-like aroma.
Kola nuts contain about 2–4% caffeine and theobromine, as well as tannins, alkaloids, saponins, and flavonoids.
Preliminary studies of phytochemicals in kola nut indicate the presence of various constituents: caffeine (2–3.5%), theobromine (1.0–2.5%), theophylline, methylliberine, polyphenols, catechins, and phlobaphens (kola red), among others.
Originally a tree of the tropical rainforest, it needs a hot humid climate, but can withstand a dry season on sites with a high ground water level. It may be cultivated in drier areas where groundwater is available. C. nitida is a shade bearer, but develops a better spreading crown which yields more fruits in open places. Though it is a lowland forest tree, it has been found at altitudes over 300 m on deep, rich soils under heavy and evenly distributed rainfall.
Regular weeding is necessary, which can be performed manually or through the use of herbicides. Some irrigation can be provided to the plants, but it is important to remove the water through an effective drainage system, as excess water may prove to be detrimental for the growth of the plant. When not grown in adequate shade, the kola nut plant responds well to fertilizers. Usually, the plants need to be provided with windbreaks to protect them from strong gales.
Kola nuts can be harvested mechanically or by hand, by plucking them at the tree branch. Nigeria produces 52.4% of worldwide production followed by the Ivory Coast and Cameroon. When kept in a cool, dry place, kola nuts can be stored for a long time.
The crop's value makes it one of the most important indigenous cash crops in West Africa and is used as a means of social mobility.
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