Which formulation method is least likely to leach into the soil?

Granules are the formulation method least likely to leach into the soil primarily due to their physical properties and application characteristics. Granules are solid particles that are spread on the surface of the ground, allowing them to dissolve slowly with moisture over time. This slow release minimizes the chance of them being washed away or leached deep into the soil profile, especially during heavy rainfall events.

In contrast, other formulation types like aerosols and liquids can easily run off or be absorbed more rapidly into the soil, increasing the potential for leaching. Emulsifiable concentrates are liquid formulations that can readily mix with water and potentially move through the soil more quickly, especially in saturated conditions. Therefore, when considering the risk of leaching, granules provide a more stable and controlled method of application that helps minimize environmental contamination concerns.