What is colluvial soil?

Colluvial soils are formed from the accumulation of geological materials at the base of a slope or hill. These soils are typically composed of a mixture of rock fragments, clay, sand, and silt, and are often found in areas with steep slopes or in locations where erosion is prevalent. Due to the high proportion of fragmented rock material, colluvial soils tend to be relatively well-drained and have low organic matter content. They are typically moderately fertile and are often used for agriculture or as building sites due to their stable nature. However, colluvial soils can also be susceptible to erosion and may require management practices such as terracing, contour plowing, or other erosion control measures to prevent soil loss and maintain soil health.