The hue of decomposed organic matter, formed in waterlogged, acidic conditions, typically ranges from light yellowish-brown to very dark brown, almost black. This variation is influenced by factors such as the degree of decomposition, the source vegetation, and mineral content. For instance, freshly formed material may exhibit a lighter shade, while extensively broken-down material presents a much darker appearance.
The visual characteristic serves as an indicator of its quality and suitability for various applications. Darker material often signifies a higher carbon content and greater decomposition, making it a valuable soil amendment for improving water retention and nutrient availability. Historically, this natural resource has been utilized as a fuel source, a building material, and an agricultural enhancer, its color acting as a guide to its properties and potential uses.