What does mottled soil, especially with bright and gray variations, typically indicate?

Mottled soil, characterized by variations of bright and gray colors, typically arises from fluctuations in soil moisture, particularly in relation to the water table. These mottled patterns happen primarily in regions where saturation varies over time, causing conditions that lead to the development of these soil colors. Bright colors often indicate oxidation processes occurring when soil is saturated with water, while gray hues suggest reduced conditions due to prolonged saturation.

The presence of mottled soil strongly suggests a seasonally high water table, as the contrasting colors signify shifting water levels rather than stable, continuously dry conditions. This pattern is common in areas where the water table rises and falls with seasonal rainfall or irrigation needs, reflecting the dynamic nature of soil saturation in those environments.