What type of soil generally has a greater capacity for binding herbicides?

Soils with more organic matter and clay have a greater capacity for binding herbicides due to their higher cation exchange capacity (CEC) and the presence of organic compounds. Clay particles have a negatively charged surface that can attract and hold onto positively charged herbicide ions, making them less likely to leach away with water. Additionally, organic matter can form complexes with herbicides, further enhancing binding and reducing their availability for transport into waterways.

This characteristic is particularly important when applying aquatic herbicides, as it helps minimize contamination of non-target areas, such as lakes and rivers, thereby protecting aquatic ecosystems. The binding ability of these soils helps ensure that herbicides remain in the target area for effective control of aquatic weeds while mitigating potential runoff issues.