What suborder represents a drainage regime with seasonal saturation?

The suborder that represents a drainage regime with seasonal saturation is characterized by soils that experience periods of saturation during certain seasons. This condition often occurs in areas where the water table rises close to or above the soil surface during specific times of the year, leading to the development of wet soil conditions.

The "Aq" suborder is particularly associated with aquic conditions, which imply that the soil is saturated with water for significant portions of the year. This saturation is crucial for understanding the hydrology and behavior of the soil in relation to plant growth and microbial processes. Aquic soils can often be found in regions prone to rainfall or in areas where groundwater is close to the surface.

In contrast, the other suborders—those that indicate well-drained, dry conditions or specific diagnostic features—do not encompass the concept of seasonal saturation. Understanding these distinctions is vital for soil classification and management practices, especially in agricultural and ecological contexts where water availability plays a significant role.