Soils can be grouped according to drainage class, which is a way of indicating how wet the soil was during its formation. Redoximorphic features and mottling are indicative of wet and reducing conditions. Soil drainage class - an indication of the frequency and duration of soil wetness during pedogenesis. Soils are usually sandy or gravelly with a very high saturated hydraulic conductivity. Somewhat excessively drained Water is removed rapidly.
Soils are usually sandy or gravelly with a high saturated hydraulic conductivity.
Well drained Water is removed from the soil readily. Moderately well drained Soils are wet for a short time period within the rooting depth. Somewhat poorly drained A shallow to moderately deep water table occurs that restricts the growth of crops unless the soil is artificially drained. Poorly drained Free water is at or near the soil surface periodically during the growing season, and the soil remains wet for long periods. The water table is shallow, and most crops cannot be grown unless the soil is artifically drained.