👉 Soused, also known as subsoil, is a term used in geology and agricultural science to describe the layer of soil below the top surface. It is composed primarily of sand and clay particles, which are typically less than 0.5 meters (19 inches) deep. The subsurface of an area is often referred to as the "bottom" or "soil layer." This term is important in understanding the composition and structure of soil and its role in supporting plant growth