Examkin

Regional Geography of Nigeria

181 soru

Tüm türler181Çoktan seçmeli105Doğru / Yanlış2Eşleştirme38Sıralama32Boşluk doldurma4
Soru 121Soru →

Arrange the following sequential stages involved in the natural gas-based manufacturing of nitrogenous fertilizer in Nigeria's Niger Delta industrial region, from primary raw material extraction to final market distribution.

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Cevap

The correct sequence begins with the extraction and piping of natural gas from Niger Delta gas fields, followed by steam methane reforming to yield hydrogen gas, catalytic chemical reaction to synthesize ammonia and urea granules, and concluding with bagging and inter-regional distribution to agricultural zones.
Natural gas-based fertilizer plants (such as those in Port Harcourt/Eleme) follow a strict forward industrial value chain. Upstream gas extraction in the Niger Delta provides the essential hydrocarbon feedstock. Midstream processing uses steam methane reforming to isolate hydrogen, which is chemically combined with nitrogen to synthesize ammonia and granular urea. Downstream logistics complete the cycle by transporting finished fertilizer from coastal manufacturing points to inland agricultural belts.

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1
Identify the primary raw material location and upstream extraction stage.
Natural gas extraction in the Niger Delta is established as the starting point of the manufacturing chain.
Chemical manufacturing requires raw material input before processing can begin.
2
Trace the initial chemical transformation of raw methane into synthesis gases.
Desulfurization and steam methane reforming form the second stage.
Raw natural gas must be chemically processed to produce pure hydrogen before ammonia synthesis.
3
Identify the primary chemical manufacturing and synthesis stage.
Ammonia synthesis and subsequent urea granulation form the third stage.
Synthesis gas is reacted with nitrogen and carbon dioxide to create the final fertilizer compound.
4
Determine the downstream commercial and spatial distribution stage.
Bagging and freight transport to agricultural markets across Nigeria form the final stage.
Finished industrial goods are transported from coastal industrial plants to consumer markets.

Anahtar Kavram

Industrial value chain and resource-based manufacturing in Nigeria
Soru 122Soru →

In southeastern Nigeria, heavy equatorial rainfall acting on deeply weathered, leached Ferrallitic soils frequently triggers catastrophic gully erosion following vegetation removal. Which of the following soil conservation strategies is most suitable for halting active gully extension and re-stabilizing these degraded slopes?

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Cevap: Establishing tree plantations and constructing structural check dams along gully channels

Cevap

Establishing tree plantations and constructing structural check dams along gully channels
Establishing tree cover (afforestation) anchors loose, deeply weathered Ferrallitic subsoils with root networks and intercepts heavy rainfall, while check dams physically obstruct channelized runoff, reducing its scouring energy and trapping eroded sediment to heal active gullies.

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1
Identify the primary cause of severe gully degradation on Ferrallitic soils in southeastern Nigeria
Gully erosion is driven by intense rainfall runoff scouring highly leached, unconsolidated sandy-clay soils after forest clearance.
Understanding the physical mechanics of water erosion isolates the necessary intervention.
2
Evaluate conservation measures that directly counteract runoff velocity and soil detachment
Tree roots bind vulnerable subsoil layers, while physical check dams slow down torrent flow, trapping suspended sediments inside the gully channel.
Revegetation combined with mechanical barriers provides immediate and long-term stabilization.

Anahtar Kavram

Soil Conservation Measures for Gully Erosion in Nigeria
Soru 123Soru →

In the Guinea Savanna zone of Nigeria, agricultural productivity on Ferruginous tropical soils derived from crystalline Basement Complex rocks is severely constrained by the seasonal formation of an indurated subsurface iron hardpan. Which soil management strategy is most effective for mitigating surface runoff erosion and restoring soil physical structure in this environment?

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Cevap: Deep subsoiling combined with contour bunding and cover cropping

Cevap

Deep subsoiling combined with contour bunding and cover cropping is the most effective management strategy for Ferruginous tropical soils with subsurface iron hardpans.
The correct strategy uses deep subsoiling to mechanically rupture the rigid subsurface iron hardpan (plinthite), allowing rainwater penetration and deeper root growth. Pairing this with contour bunding retards runoff along savanna slopes, while cover crops prevent rain-impact crusting and replenish soil organic matter.

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1
Analyze the soil characteristics and pedological constraints
Ferruginous tropical soils in Nigeria's Guinea Savanna have rich iron content that hardens into an impermeable subsurface plinthite layer (hardpan) during marked dry seasons.
Understanding the physical barrier created by hardpan formation is essential for selecting appropriate soil conservation techniques.
2
Evaluate mechanical and biological conservation options suitable for this soil group
Mechanical subsoiling breaks the dense subsurface layer to allow root penetration and water infiltration, while contour bunds prevent slope wash and cover crops reduce surface crusting.
Combining mechanical disruption of the hardpan with surface water management provides a complete soil conservation solution.

Anahtar Kavram

Ferruginous Tropical Soil Characteristics and Conservation in Nigeria
Soru 124Soru →

Arrange the following Nigerian states in ascending order of their average population density, from the state with the lowest population density to the state with the highest population density:

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The correct sequence from lowest to highest population density is Niger State, Kaduna State, Anambra State, and Lagos State.
Population density in Nigeria increases from the sparsely populated Middle Belt (Niger State) to the moderately populated northern savanna transition zone (Kaduna State), followed by the highly dense South-Eastern agricultural-commercial belt (Anambra State), and culminates in the ultra-dense coastal urban agglomeration of Lagos State.

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1
Identify the low-density belt state
Niger State belongs to the sparsely populated Middle Belt region, where large land area and historical/physical factors keep population density below 60 persons per square kilometer.
Sparsely populated regions form the baseline for ascending order.
2
Identify the moderate-density belt state
Kaduna State lies in the north-central savanna transition zone with moderate agricultural population density around 120 to 180 persons per square kilometer.
Moderate density areas exceed Middle Belt densities but remain far lower than southern high-density belts.
3
Identify the high rural-urban density belt state
Anambra State is part of the extremely dense South-Eastern belt, where high indigenous population and dense commercial settlements result in over 850 persons per square kilometer.
South-Eastern agricultural and commercial zones rank higher than northern savanna zones in density.
4
Identify the highest density state
Lagos State has Nigeria's smallest land area combined with an immense metropolitan population, creating an extreme density of over 2,500 persons per square kilometer.
Extreme urban concentration makes Lagos State the most densely populated state in Nigeria.

Anahtar Kavram

Spatial variations of population density belts across Nigeria
Soru 125Soru →

Nigeria's transportation architecture heavily relies on major arterial rail and road corridors established to link resource-producing interior hinterlands with coastal maritime outlets. Which of the following options correctly identifies the primary economic commodity historically evacuated along the Western Railway corridor from its northernmost major urban terminus to the port complex at Lagos?

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Cevap: Groundnuts from the Kano collection center

Cevap

Groundnuts from the Kano collection center
The Western Railway trunk line connects Lagos to Kano. Historically, Kano served as the premier commercial assembly point for groundnuts produced in the Northern savanna, which were transported in bulk by rail to Apapa Port in Lagos for international trade.

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1
Identify the geographical alignment of Nigeria's Western Railway corridor.
The Western Railway runs from Lagos in the southwest through Ibadan, Jebba, Minna, and Kaduna to its major northern terminus at Kano.
Understanding network geography is essential for connecting interior nodes to coastal export outlets.
2
Analyze the agricultural land-use and crop zoning along the northern segment of this rail corridor.
Kano serves as the central commercial depot for the Sudan savanna agricultural belt, famous for the historical groundnut pyramids.
Crop distribution in Nigeria is ecologically zoned by climatic belts.
3
Match the trade node and commodity to determine the historical freight movement.
Bulk evacuation of groundnuts from Kano to the Lagos port complex (Apapa) formed the economic foundation of the Western rail axis.
Colonial rail infrastructure was configured explicitly for raw material export from specific ecological production zones to coastal seaports.

Anahtar Kavram

Spatial alignment of Nigerian transport corridors and regional trade commodity evacuation
Soru 126Soru →

In the rural agricultural areas of the Benue Valley in central Nigeria, homesteads are characteristically scattered across individual farm holdings rather than clustered together in central villages. Which factor is primarily responsible for this dispersed settlement pattern?

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Cevap: The practice of extensive farming on family-owned landholdings requiring farmers to live directly on their agricultural plots

Cevap

The practice of extensive farming on family-owned landholdings requiring farmers to live directly on their agricultural plots is the primary factor responsible for the dispersed settlement pattern in the Benue Valley.
In agricultural regions such as the Benue Valley of central Nigeria, dispersed rural settlement patterns develop primarily due to land tenure systems and extensive crop farming. Farmers build family compounds directly on their cultivated plots to reduce distance between home and fields and protect agricultural holdings.

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1
Identify the settlement morphology described in the stem.
The stem describes isolated homesteads scattered over agricultural land in central Nigeria, defining a dispersed settlement pattern.
Recognizing the settlement pattern type is essential for isolating its underlying physical or socio-economic causes.
2
Analyze the geographic factors governing rural settlement distribution in the Middle Belt of Nigeria.
In agricultural areas like Tivland in the Benue Valley, land tenure systems and extensive farming practices lead individual households to reside on their farmland to minimize travel time to fields and secure land tenure.
Farm placement directly dictates living arrangements when agricultural activities are extensive and family-based.

Anahtar Kavram

Factors shaping rural settlement morphology (dispersed vs. nucleated patterns) in Nigeria
Tahmini Süre:1m 0s
Soru 127Soru →

A pedologist is conducting a latitudinal transect across Nigeria to document soil zonal distribution. Arrange the following major soil groups in sequential order according to their dominant distribution, starting from the southern coastline (Niger Delta) and moving northward toward the semi-arid northern border with Niger Republic.

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The correct South-to-North latitudinal sequence of soil zones in Nigeria is: Hydromorphic mangrove swamp soils of the coastal deltaic plains, followed by deeply weathered acidic ferrallitic soils of the rainforest belt, then ferruginous tropical soils of the Guinea savanna, and finally sandy regosols and brown soils of the Sudan/Sahel savanna in the far north.
Nigeria's soil belts reflect latitudinal climatic transitions (rainfall and vegetation) from south to north. The sequence begins at the coast with waterlogged hydromorphic mangrove soils in the Niger Delta, transitions inland to heavily leached ferrallitic soils in the tropical rainforest zone, moves into central Nigeria with ferruginous tropical soils in the Guinea savanna, and finishes at the northern border with semi-arid sandy regosols and brown soils of the Sahel belt.

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1
Identify the soil type occupying the extreme southern coastal boundary of Nigeria
Hydromorphic mangrove swamp soils formed under coastal tidal waterlogging and high organic deposition in the Niger Delta.
Coastal geography determines that marshy deltaic soils are the southernmost soil belt.
2
Identify the immediate inland soil zone corresponding to the high-rainfall forest belt
Ferrallitic soils (acid sands and reddish-yellow soils).
Heavy equatorial rainfall in southern Nigeria promotes intensive leaching (ferrallitization) directly north of the coastal swamps.
3
Identify the dominant soil zone of the sub-humid Middle Belt (savanna)
Ferruginous tropical soils overlying basement complex rocks.
Distinct wet and dry seasons in the Guinea Savanna foster ferruginous weathering with iron-rich horizons across central Nigeria.
4
Identify the northernmost soil zone adjacent to the Sahelian border
Regosols and brown soils.
Low annual rainfall and aeolian wind deposition near the Niger Republic border produce dry, poorly developed sandy soils.

Anahtar Kavram

Latitudinal Zonal Soil Distribution in Nigeria
Soru 128Soru →

Unlike the Ajaokuta Steel Plant located near the Itakpe iron ore deposits in Kogi State, the Delta Steel Company at Aladja near Warri was established far from inland iron ore fields. Which primary geographical factor determined the industrial siting of the Aladja steel plant?

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Cevap: Availability of natural gas from Niger Delta oilfields for direct reduction smelting and coastal port access for importing iron ore pellets

Cevap

The siting of the Delta Steel Company at Aladja was primarily determined by proximity to Niger Delta natural gas fields used in the direct reduction steelmaking process and access to coastal water transport facilities.
The Delta Steel Company at Aladja (Warri) was sited specifically to take advantage of abundant natural gas reserves in the Niger Delta, which fuel the Direct Reduction (DR) process of steelmaking. Additionally, its coastal location near Escravos and Warri port channels facilitates maritime transportation of imported iron ore and output distribution.

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1
Analyze the technological requirements of the Delta Steel Company at Aladja compared to traditional blast furnace plants.
Aladja uses Direct Reduction (DR) technology rather than the traditional blast furnace system used at Ajaokuta.
Direct reduction technology requires large volumes of natural gas as a reducing agent and power source instead of coking coal.
2
Identify the geographical advantages provided by the Niger Delta coastal location.
The location offers immediate access to natural gas pipelines from oilfield gas flaring/processing units and port infrastructure along the Warri river channel.
Natural gas fuels the reduction process, while river ports allow transshipment of imported iron ore pellets and heavy equipment.
3
Evaluate why alternative location factors such as market or coal proximity are secondary or inaccurate.
Steelmaking is a weight-losing manufacturing operation, and Nigeria's major coal reserves lie inland (Enugu/Middle Belt), making coastal gas resources the decisive location advantage.
Weberian industrial location principles dictate placing weight-losing or energy-intensive industries near fuel supply nodes when raw materials must be transported.

Anahtar Kavram

Industrial Location Factors for Energy-Intensive Metallurgical Manufacturing in Nigeria
Tahmini Süre:2m 0s
Soru 129Soru →

Nigeria extends from the coastal waters of the Gulf of Guinea in the south to the semi-arid region near Lake Chad in the north. Which pair of parallels of latitude defines the precise southern and northern limits of the country?

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Cevap: 4∘N4^\circ\text{N} and 14∘N14^\circ\text{N}

Cevap

4∘N4^\circ\text{N} and 14∘N14^\circ\text{N}
Nigeria is situated in West Africa between parallels of latitude 4∘N4^\circ\text{N} and 14∘N14^\circ\text{N}, giving the country a total north-south angular span of 10∘10^\circ.

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1
Identify the geographical extent of Nigeria along the north-south latitudinal axis.
The coastal southernmost border lies at latitude 4∘N4^\circ\text{N}, while the northern boundary reaches latitude 14∘N14^\circ\text{N}.
Latitude measures angular distance north or south of the Equator (0∘0^\circ).
2
Distinguish latitudinal boundaries from longitudinal boundaries.
Nigeria's latitudinal range is 4∘N4^\circ\text{N} to 14∘N14^\circ\text{N}, whereas its longitudinal range is 3∘E3^\circ\text{E} to 15∘E15^\circ\text{E}.
Interchanging latitudinal and longitudinal coordinates is a common error when learning regional location facts.

Anahtar Kavram

Latitudinal Extent of Nigeria
Soru 130Soru →

The Eastern Scarplands of Nigeria, stretching from Nsukka through Enugu to Okigwe, present a prominent cuesta landscape. Which of the following correctly describes the structural relief and drainage characteristics of this physical region?

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Cevap: A steep eastward-facing scarp slope drained by headstreams of the Cross River and a gentle westward dip slope drained by tributaries of the Anambra River

Cevap

A steep eastward-facing scarp slope drained by headstreams of the Cross River and a gentle westward dip slope drained by tributaries of the Anambra River
The Eastern Scarplands of Southeastern Nigeria represent a classic cuesta formed by tilted sedimentary strata. The asymmetric ridge features a steep scarp slope facing east (drained by short headstreams of the Cross River) and a long, gentle dip slope facing west (drained by tributaries of the Anambra River, which flows into the Lower Niger).

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1
Identify the geological structure of the Eastern Scarplands
The Nsukka-Enugu-Okigwe ridge is composed of inclined sedimentary sandstone and shale beds forming a classic cuesta landform.
Unequal erosion of tilted strata creates an asymmetric relief feature with two distinct slope faces.
2
Determine the orientation of the physical slopes
The steep escarpment faces east, while the gentle dip slope inclines westwards.
The westward dipping Cretaceous rock layers produce a sharp eastern drop-off and a gradually sloping western surface.
3
Relate the physical slopes to the regional river drainage pattern
Short, rapid streams flow down the eastern scarp into the Cross River basin, while longer streams flow down the western dip slope into the Anambra River.
Drainage systems align directly with the structural slopes of the cuesta landscape.

Anahtar Kavram

Cuesta relief structure and drainage alignment of the Eastern Scarplands
Tahmini Süre:1m 15s
Soru 131Soru →

The strategic siting of Nigeria's premier integrated iron and steel industrial complex at Ajaokuta in Kogi State was primarily determined by proximity to which of the following combinations of raw materials?

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Cevap: Iron ore deposits at Itakpe and limestone quarries at Jakura

Cevap

Iron ore deposits at Itakpe and limestone quarries at Jakura
The correct option highlights the iron ore reserves at Itakpe and limestone at Jakura. Primary iron and steel smelting is a classic heavy, weight-losing manufacturing process. Siting the Ajaokuta Steel Company in Kogi State dramatically lowers production costs by placing the plant in close spatial proximity to its essential mineral inputs.

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1
Identify the industrial classification of primary iron and steel smelting.
Primary iron smelting is classified as a heavy, weight-losing industry dependent on massive inputs of iron ore and fluxing material (limestone).
According to Weber's industrial location theory, weight-losing processes incur high raw material transport costs and must be located near mineral extraction sites.
2
Map the raw material locations supporting the Ajaokuta steel complex in Kogi State.
The plant is situated near the Itakpe hill iron ore deposit (about 52 km away) and the Jakura limestone quarry.
Proximity to these heavy essential minerals minimizes total ton-kilometer transportation costs for raw materials.

Anahtar Kavram

Raw Material Orientation in Heavy Mineral Processing Industries
Soru 132Soru →

Match each Nigerian transportation node or corridor with its primary geographic characteristic or operational commercial role.

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Öğeler

Escravos Channel
Baro Port
Eastern Railway Line
Jebba Bridge

Eşleşmeler

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Cevap

Escravos Channel matches the dredged fairway providing deep-water access to Delta ports; Baro Port matches the River Niger inland transshipment terminal; Eastern Railway Line matches the coal and eastern hinterland evacuation corridor; Jebba Bridge matches the river-crossing node connecting South-Western and Northern transport routes.
Each transport feature matches its exact geographical location and trade function: Escravos Channel permits maritime vessel entry to Delta ports; Baro is an inland river terminal on the River Niger; the Eastern Railway Line connects Port Harcourt, Enugu, and northern regions; Jebba Bridge provides the primary overland crossing point across the River Niger.

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1
Analyze maritime entrance channels in the Niger Delta coastal area
Escravos Channel serves as the main navigational access route through shallow mudbars into Delta ports.
Siltation along coastal river mouths necessitates dredged fairways for commercial maritime navigation.
2
Evaluate inland river port infrastructure along the River Niger navigation system
Baro Port functions as an inland river-rail intermodal terminal on the River Niger.
River ports serve as critical transshipment nodes connecting seasonal water routes to land transport.
3
Identify the historical economic purpose of major rail arterial routes in Nigeria
The Eastern Railway Line connects Port Harcourt to the coalfields of Enugu and northern agricultural centers.
Railways in Nigeria were aligned to transport mineral and agricultural commodities from the interior to coastal ports.
4
Determine key river-crossing infrastructure linking regional trade zones
Jebba Bridge provides the essential rail and road crossing over the River Niger.
Physical barriers like major rivers require designated bridge nodes to maintain interstate trade flow.

Anahtar Kavram

Nigerian Transportation Infrastructure and Regional Commercial Trade Corridors
Soru 133Soru →

Match each geographical region of Nigeria listed on the left with its predominant settlement pattern and primary geographical driver on the right.

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Öğeler

Sokoto-Rima Basin
Jos Plateau Uplands
Yoruba Agricultural Belt (South-West)
Cross River Basin

Eşleşmeler

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Cevap

Sokoto-Rima Basin matches with clustered nucleated villages around fadama floodplains; Jos Plateau Uplands matches with hilltop refuge sites shaped by defense and mining; Yoruba Agricultural Belt matches with large nucleated towns; Cross River Basin matches with linear ribbon settlements along rivers and highways.
Each region correctly aligns with its characteristic settlement structure: the Sokoto-Rima Basin forms nucleated clusters near scarce water bodies; the Jos Plateau features defensive hilltop and tin-mining settlements; the Yoruba belt exhibits large nucleated urban-agrarian centers; and the Cross River Basin forms linear ribbon settlements along water and road transport corridors.

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1
Examine the physical constraints and human historical factors determining settlement distribution in each Nigerian region.
Identify semi-arid water scarcity in the North-West, relief/defense/mining on the Jos Plateau, traditional urban-agricultural nucleation in the South-West, and riverine/transport corridor constraints in the South-East.
Settlement morphology across Nigeria is shaped by a combination of water availability, relief, historical defense needs, and transportation networks.
2
Pair the Sokoto-Rima Basin with its water-seeking settlement pattern.
Match Sokoto-Rima Basin with clustered villages around perennial fadama floodplains.
Perennial surface water sources attract high settlement density in semi-arid northern environments.
3
Pair the Jos Plateau and Yoruba Belt with their specific relief and socio-economic drivers.
Match Jos Plateau with hilltop refuge and mining hamlets, and Yoruba Agricultural Belt with large nucleated urban-agricultural towns.
Jos Plateau settlements originated as hilltop defensive locations, whereas southwestern Nigeria has a long history of high-density agro-urban nucleation.
4
Pair the Cross River Basin with its spatial alignment along transportation features.
Match Cross River Basin with linear ribbon settlements along river courses and roads.
Dense rainforest cover restricts settlements to accessible linear dry-land strips along rivers and roads.

Anahtar Kavram

Factors Influencing Settlement Morphology and Regional Density in Nigeria
Soru 134Soru →

During the late 1970s, the Nigerian government established inland steel rolling mills at Oshogbo, Jos, and Katsina as part of a regional industrial decentralization policy. However, these facilities faced high operational costs and underutilization. Based on industrial location theory, which factor represents the main structural geographical flaw in the siting of these inland rolling mills?

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Cevap: They incurred high overland freight tariffs transporting heavy semi-finished steel billets from coastal supply centers like Aladja.

Cevap

The main structural geographical flaw was the heavy freight cost incurred by transporting semi-finished steel billets overland from coastal primary plants like Aladja to distant inland rolling mills.
The correct option highlights the freight cost burden of moving heavy steel billets from coastal primary production nodes (such as Delta Steel at Aladja) across long distances to inland rolling plants (Oshogbo, Jos, Katsina) without efficient heavy-rail transportation. This created unsustainable assembly costs for intermediate materials.

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1
Identify the industrial input-output relationship of steel rolling mills in Nigeria.
Rolling mills require primary steel billets (intermediate heavy inputs) to produce finished rods, bars, and wire rods.
Understanding raw material/intermediate input dependencies is required to apply Weber's least-cost location model.
2
Analyze the spatial distribution of primary steel plants vs inland rolling mills.
Primary production was centered at Aladja (Delta State near the coast), whereas the rolling mills were located far inland at Oshogbo, Jos, and Katsina.
Distance between intermediate supply points and processing facilities determines assembly transport costs.
3
Evaluate transport cost implications under least-cost location principles.
Moving bulk steel billets over hundreds of kilometers via road haulage dramatically raised production costs, creating a severe locational bottleneck.
Industrial efficiency requires minimizing total transport costs (assembly of raw materials/intermediates + distribution of final products).

Anahtar Kavram

Industrial Location Factors and Decentralization Challenges in Nigerian Manufacturing
Soru 135Soru →

Despite the extensive coverage of the Niger-Benue river system through major commercial zones in Nigeria, inland water transport accounts for a minimal share of long-distance agricultural export freight compared to rail and road networks. Which of the following physical and operational factors primarily limits the year-round navigability and commercial viability of the Niger-Benue waterways?

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Cevap: Severe seasonal discharge fluctuations, extensive siltation, and shifting sandbars that drastically reduce draft depth during dry months.

Cevap

Severe seasonal discharge fluctuations, extensive siltation, and shifting sandbars that drastically reduce draft depth during dry months.
The Niger-Benue river system suffers from severe hydrological limitations, including intense seasonal variation in water volume between wet and dry seasons, high rates of silt deposition creating shifting sandbars, and rapids in certain stretches. These physical barriers reduce the draft depth, rendering large sections unnavigable for heavy commercial barges during several months of the year.

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1
Analyze the physical hydrological characteristics of River Niger and River Benue.
The rivers exhibit marked Regime variability between the rainy season (high water volume) and dry season (low discharge).
Understanding seasonal volume flow is critical to evaluating year-round vessel navigation capacity.
2
Evaluate the impact of sediment load and channel features on vessel navigation.
Heavy siltation leads to sandbars and shallow channels that ground vessels unless continuously dredged.
Bulk freight transportation requires consistent minimum draft depths to operate economically.
3
Compare river transport limitations against overland modes like rail and road.
Railways and arterial highways provide reliable, year-round schedule integrity connecting northern agricultural hinterlands to southern seaports.
Reliability and seasonality explain why inland water transport holds a low modal share in Nigeria's commercial trade traffic.

Anahtar Kavram

Hydrological Bottlenecks of Nigerian Inland Waterways
Soru 136Soru →

The Kano Close-Settled Zone in northern Nigeria maintains one of the highest rural population densities in West Africa despite receiving lower annual rainfall than the southern forest belt. Which factor primarily accounts for the historical development and sustainability of this high population density?

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Cevap: Intensive soil fertility management utilizing livestock manure and continuous cropping systems

Cevap

Intensive soil fertility management utilizing livestock manure and continuous cropping systems primarily accounts for the sustained high population density in the Kano Close-Settled Zone.
The Kano Close-Settled Zone achieved and maintained extremely high population density through historical agro-pastoral integration. Farmers used manure from cattle and small ruminants to maintain soil fertility, enabling continuous annual cultivation of grains (sorghum, millet) and groundnuts on small, inherited farm plots.

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1
Analyze the geographical context of the Kano Close-Settled Zone
The zone is located in Northern Nigeria within the Sudan Savanna belt, characterized by moderate rainfall and high agricultural land use.
Understanding the physical environment helps evaluate which land management and agricultural practices are feasible.
2
Identify the primary mechanism supporting high rural population density in this ecosystem
Local farmers integrated livestock keeping with crop farming (manuring), allowing continuous cultivation of farmland without requiring extensive bush fallowing.
Intensive land management allowed high carrying capacity and dense rural populations to thrive for centuries.

Anahtar Kavram

Factors influencing population density in Northern Nigeria (Kano Densely Populated Zone)
Soru 137Soru →

In Northern Nigeria, commercial groundnut production is heavily concentrated in the light-soil zones around Kano and Katsina, whereas commercial cotton production is predominantly focused around Zaria and Funtua. Which of the following physical factors best accounts for this spatial differentiation between the two cash crop belts?

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Cevap: Groundnut requires well-drained, light sandy loams for easy pod penetration and harvesting, whereas cotton demands deeper, heavier clay-loam soils with greater moisture retention.

Cevap

Groundnut requires well-drained, light sandy loams for easy pod penetration and harvesting, whereas cotton demands deeper, heavier clay-loam soils with greater moisture retention.
The spatial distribution of groundnut and cotton in Northern Nigeria is primarily governed by soil texture and rainfall gradients. Groundnut is geocarpic (fruit matures underground), requiring light, loose sandy loams for the peduncle (peg) to penetrate the soil and for easy harvesting. Cotton, conversely, requires higher soil moisture retention and deeper clay-loam soils found in the slightly wetter belt around Zaria and Funtua.

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1
Identify the geographical regions mentioned in Northern Nigeria
Kano and Katsina lie in the Northern Sudan savanna belt, while Zaria and Funtua lie in the Southern Sudan / Northern Guinea savanna transition zone.
Understanding the ecological and soil gradient from north to south helps isolate the key growth requirements of each crop.
2
Analyze the soil and moisture requirements of groundnut
Groundnut develops its pods underground (pegging); thus, light, loose, sandy loam soils are necessary for flower stalk penetration and harvesting without pod breakage.
The sandy loams of the Kano region are ideal for subterranean fruit development.
3
Analyze the soil and moisture requirements of cotton
Cotton requires heavier, deeper loams with good water retention and slightly higher rainfall (750 mm−1,000 mm750\text{ mm} - 1,000\text{ mm}) during its growing cycle.
The heavier clay-loam soils around Zaria provide the required moisture retention during the critical boll formation stage.

Anahtar Kavram

Soil Texture and Moisture Limits in Crop Zonation of Northern Nigeria
Tahmini Süre:2m 0s
Soru 138Soru →

Match each mineral or energy resource found in Nigeria on the left with its principal deposit location or operational power generation site on the right.

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Öğeler

Kaolin
Lead-Zinc ore
Marble
Hydroelectric Power

Eşleşmeler

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Cevap

Kaolin matches with Kankara (Katsina State); Lead-Zinc ore matches with Abakaliki (Ebonyi State); Marble matches with Igbeti (Oyo State); Hydroelectric Power matches with Dadin Kowa (Gombe State).
Each item correctly pairs with its geographical extraction center or operational energy facility: Kaolin is located in Kankara (Katsina State), Lead-Zinc ore in Abakaliki (Ebonyi State), Marble in Igbeti (Oyo State), and Hydroelectric Power generation at Dadin Kowa (Gombe State).

Adım Adım Çözüm

1
Identify the primary source location of kaolin clay in northern Nigeria.
Kaolin corresponds to Kankara in Katsina State.
Kaolin clay is formed from weathered feldspathic rocks abundantly found near Kankara.
2
Locate major lead-zinc mineralization along the Benue Trough structure.
Lead-Zinc ore corresponds to Abakaliki in Ebonyi State.
Abakaliki lies within the lower Benue Trough, known for rich galena (lead) and sphalerite (zinc) veins.
3
Determine the notable quarrying center for high-grade metamorphic marble.
Marble corresponds to Igbeti in Oyo State.
Igbeti is widely recognized in Nigeria as the 'Marble City' due to extensive crystalline limestone metamorphic deposits.
4
Match the renewable hydroelectricity plant with its host dam site.
Hydroelectric Power corresponds to Dadin Kowa in Gombe State.
Dadin Kowa Dam houses a major hydroelectric power scheme constructed on the Gongola River.

Anahtar Kavram

Spatial distribution of solid minerals and hydroelectric energy infrastructure in Nigeria
Soru 139Soru →

Which environmental resource management strategy is primarily used in northern Nigerian states such as Sokoto and Jigawa to control wind erosion and arrest desertification?

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Cevap: Establishing afforestation shelterbelts and tree windbreaks along arid borders

Cevap

Establishing afforestation shelterbelts and tree windbreaks along arid borders
Establishing shelterbelts and planting tree windbreaks along the arid northern borders reduces wind velocity, traps loose sand, and prevents topsoil loss, making it the most effective ecological measure against desertification in northern Nigeria.

Adım Adım Çözüm

1
Identify the environmental hazard and affected region
The hazard described is desertification and wind erosion in semi-arid northern Nigeria.
Northern border states like Sokoto and Jigawa experience dry winds and expanding desert conditions.
2
Evaluate effective ecological control measures for wind erosion
Planting rows of drought-resistant trees (shelterbelts) physically breaks wind speed and stabilizes loose topsoil.
Afforestation shelterbelts are ecologically suited to low-rainfall savanna belts.

Anahtar Kavram

Afforestation and Shelterbelts for Desertification Control
Tahmini Süre:45s
Soru 140Soru →

Arrange the following geographical zones of Nigeria in DESCENDING order of their average population density, starting from the zone with the highest population density down to the zone with the lowest population density.

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Cevabı ve açıklamayı göster

Cevap

The correct sequence from highest to lowest population density is: Lagos Coastal Industrial Zone, followed by the Orlu-Okigwe Uplands of Southeastern Nigeria, then the Kano Close-Settled Zone of Northern Nigeria, and finally the Borgu Plains of the Middle Belt.
The correct order follows the established empirical population density gradient of Nigeria: the Lagos Coastal Industrial Zone has the highest overall density (>2,500 persons/km²); the Orlu-Okigwe Uplands represent the peak rural density belt (800-1,000 persons/km²); the Kano Close-Settled Zone forms the main northern high-density agricultural region (300-500 persons/km²); and the Borgu Plains fall within the sparsely populated Middle Belt (<50 persons/km²).

Adım Adım Çözüm

1
Identify the primary urban megacity hub with national peak population density
Lagos Coastal Industrial Zone is ranked 1st (>2,500 persons/km²).
Lagos functions as Nigeria's chief economic and urban industrial center, resulting in unmatched population concentration.
2
Identify the highest rural-agricultural population density belt
Orlu-Okigwe Uplands of Southeastern Nigeria is ranked 2nd (800-1,000 persons/km²).
Southeastern Nigeria features the highest rural population densities in Sub-Saharan Africa due to favorable environmental conditions and intensive land-use systems.
3
Identify the major high-density savanna agricultural zone
Kano Close-Settled Zone of Northern Nigeria is ranked 3rd (300-500 persons/km²).
Although densely populated relative to the Sudan Savanna, it is less dense than the core urban coast of Lagos and the high-density rural heartland of the Southeast.
4
Identify the sparsely populated Middle Belt zone
Borgu Plains of the Middle Belt is ranked 4th (<50 persons/km²).
The Middle Belt of Nigeria contains large uninhabited or sparsely settled tracts due to historical slave raiding, physical soil limitations, and disease vectors.

Anahtar Kavram

Spatial variation of population density zones across Nigeria and their driving physical and socio-economic factors.
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Regional Geography of Nigeria Alıştırma Soruları — JAMB UTME — Sayfa 7 | Examkin