The researchers studied how temperature affects the movement of cadmium in soil. They found that at higher temperatures, cadmium is more active and easier to move around. In colder temperatures, cadmium becomes less active and stays in the soil. When there is a lot of cadmium in the soil, it can change forms. In freezing temperatures, cadmium doesn't bind to organic matter. When there is a high level of cadmium pollution, it can be found in non-residual form and is more active.