Which farming practice helps reduce soil erosion and water pollution from farming?

Which farming practice helps reduce soil erosion and water pollution from farming?

• A. Crop rotation
• B. Fertilizer management
• C. Terracing
• D. Conservation tillage

Answer: (D)

Conservation tillage reduces soil erosion and water pollution most effectively because it keeps crop residues on the field so the soil remains mostly covered and disturbs the soil less. This protective cover absorbs the impact of raindrops, slows down surface water, and enhances infiltration, so fewer soil particles are detached and carried into waterways. With less sediment in runoff, there’s also less attached nutrient loss, which helps protect water quality. Over time, the soil structure and organic matter improve, making erosion even less likely. Other practices have benefits in specific contexts but don’t address erosion and pollution as directly and broadly. Crop rotation supports soil health and can reduce erosion somewhat through better cover and roots, but doesn’t guarantee continuous coverage. Fertilizer management mainly targets reducing nutrient runoff, not erosion itself. Terracing helps on slopes by slowing runoff, but its use is terrain-specific and not as universally applicable as conserving tillage.

Conservation tillage reduces soil erosion and water pollution most effectively because it keeps crop residues on the field so the soil remains mostly covered and disturbs the soil less. This protective cover absorbs the impact of raindrops, slows down surface water, and enhances infiltration, so fewer soil particles are detached and carried into waterways. With less sediment in runoff, there’s also less attached nutrient loss, which helps protect water quality. Over time, the soil structure and organic matter improve, making erosion even less likely.

Other practices have benefits in specific contexts but don’t address erosion and pollution as directly and broadly. Crop rotation supports soil health and can reduce erosion somewhat through better cover and roots, but doesn’t guarantee continuous coverage. Fertilizer management mainly targets reducing nutrient runoff, not erosion itself. Terracing helps on slopes by slowing runoff, but its use is terrain-specific and not as universally applicable as conserving tillage.