Sodic soil is a type of soil that contains a high percentage of sodium ions, which can negatively affect plant growth. This soil often has poor structure, leading to reduced water infiltration and drainage. As a result, sodic soils can become compacted and may develop a crust on the surface, making it difficult for plants to establish roots. The presence of sodium in sodic soil can also lead to increased soil salinity, which can further hinder agricultural productivity. To manage sodic soils, farmers may use amendments like gypsum, which helps to displace sodium and improve soil structure, promoting healthier crop growth.