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Difficulty: MediumSoil Types, Distribution, and Soil Conservation in Nigeria

Match each major Nigerian soil type listed on the left with its corresponding geographic distribution and physical characteristics on the right.

  • Ferrallitic SoilsDominant in the high-rainfall southern rainforest belt; intensely leached, acidic, and rich in iron and aluminum oxides.
  • Ferruginous Tropical SoilsExtensive across the Guinea and Sudan savanna zones; formed over crystalline basement rocks with rich mineral reserves.
  • Hydromorphic SoilsConcentrated along the Niger-Benue floodplains and Niger Delta; seasonally waterlogged, fine-textured, and rich in fresh silt deposits.
  • Regosols and Brown SoilsConfined to the semi-arid extreme northern border regions; sandy, weakly developed, and highly susceptible to wind erosion.

Answer

Ferrallitic Soils match the southern rainforest belt profile; Ferruginous Tropical Soils match the Guinea/Sudan savanna profile over crystalline rocks; Hydromorphic Soils match the Niger-Benue floodplains and deltaic lowland profile; Regosols and Brown Soils match the semi-arid extreme northern border profile.
Soil distribution in Nigeria reflects rainfall gradients and relief: Ferrallitic soils characterize the humid southern forest belt, Ferruginous tropical soils cover the middle belt and northern savannas over crystalline basement rocks, Hydromorphic soils line major river floodplains and the Niger Delta, and Regosols dominate the dry aeolian northern borderlands.

Step-by-Step Solution

1
Analyze the climatic and vegetation context of each Nigerian soil group.
Heavy rainfall in the south correlates with severe leaching (Ferrallitic); seasonal wetting/drying in savannas correlates with weathered crystalline soils (Ferruginous); riverine overflow correlates with alluvial deposition (Hydromorphic); arid winds correlate with sandy deposits (Regosols).
In Nigerian regional geography, soil distribution follows latitudinal climatic zones and local drainage conditions.
2
Pair each soil group with its unique pedological characteristics and location.
Ferrallitic Soils -> Southern rainforest belt (intensely leached); Ferruginous Tropical Soils -> Savanna zones (crystalline basement complex); Hydromorphic Soils -> Niger-Benue valleys and Niger Delta (waterlogged silts); Regosols -> Northern Sahel fringe (sandy/wind-eroded).
Aligning soil taxonomy with regional climate and geomorphology provides the correct matches.

Key Concept

Zonal and azonal soil distribution across Nigeria's ecological zones
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Topics

Soil Types, Distribution, and Soil Conservation in Nigeria

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