What is a major factor in the risk of leaching?

Soil permeability is a crucial factor in the risk of leaching, as it determines how easily water and dissolved substances can move through the soil profile. When permeability is high, water can flow quickly through the soil, potentially carrying pesticides and nutrients deeper into the ground where they may reach groundwater sources. This can lead to contamination and adversely affect water quality.

In contrast, lower permeability can retain water and chemicals near the surface, reducing the likelihood of leaching but possibly increasing runoff or surface contamination. Understanding the relationship between soil permeability and leaching helps in making informed decisions about pesticide application, soil management practices, and environmental protection strategies.