Freezing salty water on soil in winter can help remove salt from the soil. In a four-year study, researchers looked at how salt moves out of the soil when the frozen water melts and soaks in. They found that most of the salt left the soil in the first 30 days after freezing. The water from the melting ice took more salt out of the soil than the original irrigation water. By the end of the process, the salt levels in the soil were much lower than before. This shows that freezing salty water on soil can help get rid of salt from the soil.