실트, or silt, is a fine-grained sediment that is larger than clay but smaller than sand. It is composed of mineral particles and organic matter, making it an important component of soil. Silt is often found in riverbeds, floodplains, and deltas, where it is deposited by water flow. Due to its small particle size, silt retains moisture well, which can benefit plant growth. However, excessive silt can lead to problems like erosion and reduced water quality in aquatic environments. Understanding the role of silt is crucial for agriculture and environmental management.