What is the term for the ratio of the mass of water to the mass of solids in soil?

The term that refers to the ratio of the mass of water to the mass of solids in soil is soil water content. This is typically expressed as a percentage and is a crucial parameter in geotechnical engineering and soil science since it influences various soil properties, including its strength, compressibility, and ability to support structures. By measuring the soil water content, engineers can assess the moisture conditions that affect soil behavior, which is essential for foundation design, slope stability analysis, and other critical civil engineering applications. Understanding soil water content also helps in determining drainage and irrigation needs for agricultural settings.