The study looked at how tetracycline (an antibiotic) behaves in different types of soils. They found that the amount of tetracycline that sticks to soil can change depending on the soil's properties like organic carbon and pH levels. In acidic soils, tetracycline sticks mostly due to hydrophobic interactions, while in alkaline soils, it sticks mainly through cation exchange. The presence of cadmium in the soil can also affect how much tetracycline sticks to it. This information can help predict what happens to tetracycline in different soils and understand its impact on the environment.