After applying a preemergence product, what action helps move the chemical into the soil?

• A. Watering the lawn.
• B. Mowing immediately.
• C. Raking in the product.
• D. Letting it dry completely.

Answer: (A)

Moisture is needed to move preemergence products from the surface into the soil where weed seeds germinate. A light watering after application helps wash the chemical into the upper root zone and activate it, creating a protective barrier that prevents weed germination. Other actions don’t achieve that same movement: mowing right after application can disrupt or remove the product from the surface; raking in the product can break the uniform barrier and mix it unevenly; letting it dry completely stops the chemical from penetrating the soil and can leave it vulnerable to wash-off.