How does crop rotation benefit soil health?

• A. By depleting soil nutrients
• B. By disrupting pest and disease cycles
• C. By promoting monoculture practices
• D. By reducing soil biodiversity

Answer: (B)

Crop rotation benefits soil health primarily by disrupting pest and disease cycles. When different crops are planted in a sequence on the same land, it interrupts the life cycles of pests and diseases that are specific to particular crops. For instance, if a pest is reliant on a specific crop for its survival and the farmer rotates to a different crop that the pest cannot infest, the pest population may decrease significantly. This practice not only helps in managing pest pressures naturally but also reduces the reliance on chemical pesticides, which can have negative effects on the environment.

In addition to pest management, crop rotation enhances soil health by improving the nutrient profile, as different crops have varying nutrient needs and contributions. This diversity in planting cycles allows for better utilization of the soil's nutrient reservoir, fostering a more balanced ecosystem. Additionally, diverse root structures from different crops can improve soil structure and prevent erosion.

By contrast, practices such as monoculture, which involve growing the same crop repeatedly, can lead to nutrient depletion, increased susceptibility to pests and diseases, and reduced soil biodiversity, all of which can negatively impact soil health over time.