What is the specific yield range for clay soils?

The specific yield of clay soils typically falls within the range of 1-10 percent. This value reflects the amount of water that can be drained from the soil due to gravity relative to the total volume of the soil. Clay soil has a very small particle size, leading to higher cohesion and lower permeability. This makes it retain water more than larger particles found in sandy or loamy soils, resulting in a lower specific yield. Understanding this range is critical for assessments related to on-site sewage facilities, as it can influence how wastewater is treated and absorbed into the ground.