Grey soil often indicates poor drainage or waterlogging. When soil is constantly saturated with water, it lacks air, leading to a reduction in iron. This reduced state of iron gives the soil its characteristic grey, green, or bluish-grey colors.
While some soils are naturally grey due to their mineral composition, the presence of grey color in a previously different-colored soil often points to drainage issues.
Here are some additional insights:
- Iron plays a crucial role: Iron in its oxidized state (when combined with oxygen) gives the soil a reddish hue. However, in waterlogged conditions, iron is in its reduced state, resulting in a grey color.
- Organic matter: Soil with high organic matter content typically appears dark brown or black. However, excessive water can inhibit the decomposition of organic matter, contributing to a grey appearance.
