Which hydric soil should be monitored for depleted surfaces?

The monitoring of hydric soils for depleted surfaces is particularly crucial in sandy soils with dark surfaces that have concentrations of iron or organic materials. These particular characteristics suggest that the soil experiences cyclical periods of saturation and drying, allowing for moist conditions suitable for hydric soil formation.

In sandy soils, depletion can occur more readily due to leaching processes, where water moves downward, carrying away nutrients and minerals. The dark surface horizon indicates organic matter accumulation, which can provide critical habitat for wetland flora and fauna. Consequently, monitoring these soils for depletions becomes vital, as changes in their hydric characteristics can affect the overall ecosystem health and may indicate shifts in hydrology.

Other soils, such as clay, loamy, or rocky soils, do not display the same characteristics that necessitate focused monitoring for depletions in the same manner as sandy soils with dark surfaces. Clay soils tend to retain water more effectively, while rocky soils often denote well-drained conditions that don't support hydric soil development. Loamy soils may present a mix of characteristics but aren’t specifically linked to the depletions observed in sandy soils with dark surfaces. Thus, the unique properties of the sandy/dark surface with concentrations make it the correct choice for monitoring depleted surfaces