The study looked at how a herbicide called sulfentrazone behaves in different soils in Brazil. By testing how well the soil holds onto and releases the herbicide, the researchers found that the order of how much sulfentrazone sticks to the soil varies depending on the type of soil. Soils with more organic matter and clay tend to hold onto the herbicide better. On the other hand, soils with less organic matter and clay let go of the herbicide more easily. This means that using sulfentrazone in soils with low clay and organic matter levels can increase the risk of contaminating future crops.