PHYSICAL SETTINGPost Comment PHYSICAL SETTING Nigeria
Geology: Much of the state is covered by PreCambrian igneous and metamorphic rocks which extend over the state through
Commercial Center of Ibadan
llorin, Kabba and Ondo. The older granites have resulted in smooth domed inselbergs particularly in areas around lseyin, lgbeti and the greater parts of Oyo North.
Certain groups of metasediments which abound in areas around lfedapo, Kajola and lfeloju, local government areas include the quartzofelds pathic biotite schists, quartzites and marble. Larger quantities of quartzites are found within Ogbomoso and Oyo local government areas.
Mineral Resources: Oyo State is not particularly rich in prominent minerals but is endowed with a wide distribution of the simple but easytoutilize sedimentary and metamorphic groups of minerals, namely, marble, red clay, sand, gravel, granite, limestone and talc.
Climate: Oyo State exhibits the typical tropical climate of averagely high temperatures, high relative humidity and generally two rainfall maxima regimes during the rainfall period of March to October. The mean temperatures are highest at the end of the Harmattan (averaging 28°C), that is from the middle of January to the onset of the rains in the middle of March.
Ladoke Akintola University of Technology, Ogbomoso
Even during the rainfall months, average temperatures are between 24°C and 25°C, while annual range of temperature is about 6°C. Rainfall figures over the state vary from an average of 1200mm at the onset of heavy rains to 1800mm at its peak in the southern part of the state to an average of between 800mm and 1500mm at the northern parts of the State.
Vegetation: The southern parts of the state, it particularly the lbadan-lbarapa region, are covered by the rain forest and derived savannah. Much of Lanlate, Eruwa, lgboOra in lbarapa and Akinyele, Oluyole and Lagelu local government areas are covered by the rain forest. The composition is basically the large tall crowned trees, mixed with thick undergrowth. The high annual rainfall and high.
SmallScale Industrial Categories: Agrobased, Food Processing Forest Based Industries, Leather and Rubber Based Industries: Mineral Based Industries: Metallurgical Based Industries Biscuits and Sweets; Beverages; Cocoa Products; Canning.
Aerial view of Ibadan
Corn Processing; Cattle and Poultry Feed; Candy; Coconut Processing; Dehydrated Ginger; Roasted Cashew; Edible Oils; Garri; Yam Flour; Ice Cream; Rice Milling; Mechanised Bakery. Furniture (Educational and Household), Bamboo and Cane products; Wooden Toys; Tooth Picks; Wood Carving and Decorating Articles; Wooden Electrical Accessories; Safety Matches.
Leather Attache Cases: Leather Goods, Shoes, Belts and Fancy Articles Gloves, Balls, etc.; Rubber Shoes, Rubber Bottles and Nipples; Rubber Balloons, Rubber Pipes; Rubber Toys; Rubber Battery Cases; Tyres Retreading. Ceramic Electrical Accessories: Floor Titles; Burnt Clay Bricks.
Cement/Concrete Poles; Mirrors; School Chalk; Glass Bottles; Refractory Bricks; Polythene Bags; Plastic Tubing; Plastic Toys; Fibre Glass; Reinforced Plastics; Synthetic Detergents; Thinners; Laboratory Chemicals and Reagents. Tin Containers; Iron Rods and Flat Sheets; Wire Netting and Fencina.
humidity encourage the growth and sustenance of the tall rich vegetation in this zone. These also encourage perennial tree cultivation including cocoa, kolanut and rubber. The tree species include the Mahogany, Obeche, Sapele and tropical Cedar. Within this belt are attached various species that are dependent on the major tall trees.
The Bower's Tower, Ibadan
These include the Parasites living on the sap of other liv ing trees Saprophytes which dig their roots and live on decaying vegetable matter like the dead wood trunk; Climbers which wind themselves round the tree trunks as they climb their way up, e.g. the liana and Epiphytes though twisting round tree trunks still leave their roots dangling in the air and, when subsequently rooted in the ground, start to grow and are reputed to strangle their host tree to death thus giving them the names "Killers" and "Stranglers" (lloeje, 1981).
The vegetation thins out into the derived semi deciduous forest as one moves towards southern Oyo and Afijio local government areas. Here, there is a mixture of tall trees, palm trees and tall grasses in the patchy lands utilized for cultivation. Ogbomoso, northern Oyo, lseyin and Kajola local government areas are covered by the Guinea Savannah while the extreme northern parts of the State, namely Saki and Kishi areas in lfedapo and Irepo local government areas are covered by the Sudan Savannah.
University of Ibadan Teaching Hospital, Ibadan
Here, a greater percentage of the vegetation is grass and woodland. Soils: Much of Oyo State is covered by the fertile loamy soils derived mainly from the Pre Cambrian hornblendebiotite geneiss. In the forest zone of the southern parts of the state, the soils include clay, laterite and thick rich dark loamy and humus components.
It is frequently water logged in many parts during the wet season. Northward, the soils are lighter and become a mixture of laterite and finegrained loamy and humus materials which support poorer vegetation and the cultivation of cereals like maize, guinea corn and millet as well as roots like yam and cassava.
Relief: Oyo State lies mostly on lowlands which are punctuated by rocky outcrops and series of hills. Most of the rock outcrops are located in areas around lseyin, Shaki, Sepeteri, Okeho and tgbeti. These are mainly of schist and quartzite inselbergs.
The boundary of the lowlands is marked in the north by the edge of the basement complex of the Western Highlands and in the south by the coastal deposits. Some prominent rivers and their tributar ies which flow through the state have created some notable river basins. The major rivers include the Ogun, Osun, Oyan, Oba and Ona.
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