Many early agricultural societies relied on crop rotation to maintain soil fertility. By alternating the types of crops grown in a particular field, farmers could prevent the depletion of specific nutrients. For example, planting legumes such as peas or beans in a field that had previously grown wheat helps replenish nitrogen, a vital nutrient that wheat heavily consumes. This practice not only sustained crop yields over generations but also reduced the likelihood of pest infestations that typically target a single, continuously grown crop.
Which of the following best describes why the author mentions "legumes such as peas or beans"?
- Aprovide an example of crops that were grown continuously to prevent pest infestations
- Bargue that legumes were the most important crops for the survival of early agricultural societies
- illustrate a specific method by which crop rotation replenishes a vital soil nutrientCevap
- Dexplain the underlying biological mechanism through which nitrogen is restored to depleted soil
- Eidentify a secondary benefit of crop rotation that is entirely unrelated to soil fertility
Cevap
illustrate a specific method by which crop rotation replenishes a vital soil nutrient
The sentence immediately preceding the mention of legumes states that alternating crops helps prevent nutrient depletion. The author then writes 'For example, planting legumes...' This structural relationship clearly indicates that legumes are being mentioned to provide a concrete illustration of how the broader agricultural principle of crop rotation works to restore nutrients.
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