Question 34

Crop rotation helps reduce soil erosion.

Crop rotation is a farming method that involves alternating the types of crops grown in a particular area over successive seasons. This practice enhances soil health and structure, which significantly reduces erosion.

A) Subsistence agriculture

Subsistence agriculture primarily focuses on growing enough food to meet the needs of the farmer and their family, often involving extensive land use without crop rotation. This method can lead to soil degradation and increased erosion due to the lack of diversity in crops and poor soil management practices.

B) Deforestation

Deforestation involves clearing trees and vegetation, which exacerbates soil erosion. The removal of plant cover eliminates the roots that hold the soil in place, making it much more susceptible to erosion from wind and rain.

C) Mechanized plowing

Mechanized plowing can lead to soil compaction and disruption of soil structure, which can increase erosion rather than mitigate it. While it improves efficiency in farming, it does not provide the protective benefits that crop rotation offers.

D) Crop rotation

Crop rotation is effective in reducing soil erosion as it promotes soil health through diverse root structures and the replenishment of nutrients. Different crops can improve soil stability and reduce the likelihood of erosion by providing ground cover and enhancing soil organic matter.

Conclusion

Crop rotation is the only method among the options presented that actively contributes to reducing soil erosion by maintaining soil structure and health. In contrast, subsistence agriculture, deforestation, and mechanized plowing can lead to increased erosion and degradation of the land. Therefore, crop rotation stands out as the effective choice for sustainable farming practices.