The article shows how the amount of water a soil can hold (drainage porosity) is related to how easily water can flow through it (saturated hydraulic conductivity). By studying soil samples, the researchers found a new equation that accurately predicts how fast water moves through soil based on its porosity. This equation works well for a wide range of soil types and doesn't depend on the soil's texture. This new method can help scientists and engineers better understand and manage water movement in different types of soil.