A commercial agricultural enterprise plans to establish large-scale cocoa and oil palm pla… — JAMB UTME

A commercial agricultural enterprise plans to establish large-scale cocoa and oil palm plantations in Nigeria. Based on the spatial distribution of climatic conditions and vegetation belts across the country, which region provides the most ecologically suitable environment for these perennial cash crops?

The humid rainforest and derived savanna belts of southern Nigeria, characterized by annual rainfall exceeding $1500\text{ mm}$ and a long wet season.Answer
B
The dry Sudan savanna zone of northern Nigeria, where low relative humidity prevents fungal leaf blight and accelerates fruit harvesting.
C
The semi-arid Sahel savanna belt along the northern border, where sandy soils and intense solar radiation boost oil palm fruit yields.
D
The northern Guinea savanna belt, where prolonged seven-month dry spells with harmattan winds favor tree crop flowering.

Answer

The humid rainforest and derived savanna belts of southern Nigeria provide the ecologically optimal conditions of high rainfall (

>1500\text{ mm}

) and short dry seasons required for perennial cash crops like cocoa and oil palm.

The humid rainforest and derived savanna belts of southern Nigeria receive abundant rainfall (

>1500\text{ mm}

annually) with high atmospheric humidity and minimal dry-season moisture stress, matching the precise ecological envelope needed for cocoa and oil palm cultivation.

Step-by-Step Solution

Analyze crop ecological requirements

Cocoa (*Theobroma cacao*) and oil palm (*Elaeis guineensis*) are perennial tree crops requiring high humidity, temperatures between

24^\circ\text{C}

and

30^\circ\text{C}

, and high rainfall (

>1500\text{ mm}

) evenly distributed with a short dry period.

Tree cash crops cannot survive prolonged moisture deficits or low relative humidity.

Map requirements onto Nigerian ecological zones

Southern Nigeria (comprising states like Ondo, Cross River, Edo, Ogun, and Osun) falls within the Tropical Rainforest belt, receiving over

1500\text{--}3000\text{ mm}

of rainfall annually.

The latitudinal gradient of rainfall decreases from south to north across Nigeria.

Evaluate and eliminate unsuitable northern zones

Savanna belts (Guinea, Sudan, Sahel) in northern Nigeria experience dry seasons ranging from 5 to 9 months and rainfall under

1000\text{ mm}

, supporting grain crops (millet, sorghum) and groundnuts rather than tree crops.

Misattributing forest crops to northern savanna belts represents a common spatial geography misconception.

Key Concept

Ecological Zonation of Agricultural Crops in Nigeria

Estimated Time:1m 30s

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