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Difficulty: MediumInferential Comprehension and Deduction

Read the passage below carefully:

In the cocoa-growing belt of Ondo State, smallholder farmers have historically managed multi-canopy agroforestry systems, planting cocoa trees beneath indigenous timber species. These upper-canopy trees provided microclimatic regulation, protecting cocoa plants from heat stress while maintaining soil moisture through deep root architectures. However, the introduction of high-yielding hybrid cocoa varieties in the early 2000s prompted widespread clearing of shade trees. Extension services aggressively promoted full-sun cultivation, promising immediate yield multiplication. While harvest volumes initially surged, farms soon experienced severe soil degradation, rampant pest infestations, and abbreviated tree lifespans. Today, facing prolonged dry seasons attributed to shifting weather patterns, farmers are increasingly returning to shaded systems by reintroducing native trees. This revival is driven not by external ecological mandates, but by agricultural necessity; shaded farms retain surface moisture up to three weeks longer into the dry season than open-canopy plots. Furthermore, the timber canopy yields secondary income through non-timber forest products such as medicinal barks and wild mushrooms during off-peak cocoa cycles, offering financial stability when market prices fluctuate.

From the passage, it can be inferred that the initial transition to full-sun cocoa cultivation failed to account for which of the following long-term outcomes?

  1. The ecological buffer provided by indigenous shade trees was crucial for sustaining long-term soil health and farm viability.Answer
  2. B
    Agricultural extension services intentionally deceived cocoa farmers to profit foreign chemical distributors.
  3. C
    High-yielding hybrid cocoa varieties are biologically incapable of surviving in tropical climate conditions.
  4. D
    The return to native agroforestry was primarily motivated by compliance with international environmental regulations.

Answer

The correct option is that the ecological buffer provided by indigenous shade trees was crucial for sustaining long-term soil health and farm viability.
The passage explains that removing upper-canopy trees led to soil degradation, pest outbreaks, and shortened tree lifespans despite initial yield increases. This directly implies that the transition to full-sun farming failed to consider the vital protective role shade trees played in maintaining soil moisture and long-term farm resilience.

Step-by-Step Solution

1
Analyze the passage context regarding full-sun cocoa cultivation.
Full-sun cultivation initially surged harvest volumes but quickly led to soil degradation, pest infestations, and shortened tree lifespans.
Understanding the contrast between initial yield promises and subsequent environmental decline reveals what the original decision overlooked.
2
Synthesize the protective functions of upper-canopy trees described in the text.
Indigenous timber species regulated microclimates, shielded cocoa from heat stress, and preserved soil moisture.
Removing these canopy trees disrupted these natural protective mechanisms, causing severe long-term damage.
3
Evaluate the choices to select the valid logical deduction.
The statement regarding the crucial protective buffer of indigenous shade trees for soil health and farm viability is directly supported by the passage.
Deductions must rely strictly on implicit textual evidence without introducing speculative external premises.

Key Concept

Inferential Comprehension and Deduction
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Inferential Comprehension and Deduction

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