BMPs help reduce non-point source pollution and promote which outcome?

• A. Increased fertilizer application
• B. Greater pesticide reliance
• C. Less mulch usage
• D. Efficient use of water

Answer: (D)

Best management practices are all about controlling how water and nutrients move through the landscape to prevent diffuse pollution from washing into waterways. They promote efficient use of water through proper irrigation methods, timing, and placement of fertilizers so nutrients stay in the soil and are taken up by plants rather than being carried away by rain and irrigation water. This directly reduces runoff that could carry nutrients, pesticides, and sediments into streams and groundwater. The other options would tend to increase pollution or waste resources—more fertilizer or pesticide use adds potential pollutants, and using less mulch can lead to greater soil erosion and runoff. So the most fitting outcome BMPs promote is efficient use of water.