Which component is typically included in nutrient management plans to prevent groundwater contamination?

• A. It includes timing and rate of fertilizer applications to minimize leaching.
• B. It requires applying nutrients daily regardless of crop uptake.
• C. It prohibits any use of compost or manure.
• D. It requires planting only water-intensive crops.

Answer: (A)

Preventing groundwater contamination hinges on matching nutrient supply to crop needs and keeping excess nutrients out of the soil water that can move downward. Including the timing and rate of fertilizer applications in a nutrient management plan ensures nutrients are available when crops can use them and minimizes the amount left in the soil to leach into groundwater. By aligning when and how much fertilizer is applied with crop uptake, soil type, and weather conditions, you reduce the risk that nitrate or other nutrients will migrate through the root zone and contaminate groundwater. This approach also supports other good practices, like soil testing and monitoring, which help tailor applications to actual crop demand and soil fertility. In contrast, applying nutrients daily regardless of crop uptake or prohibiting compost and manure, or focusing on water-heavy crops, would not address how nutrient movement occurs in the soil and would raise the risk of groundwater contamination.