Which of the following is indicative of gleying in soil?

Gleying in soil refers to a specific condition that occurs in saturated soils where oxygen is limited. This lack of oxygen leads to the reduction of iron and other minerals, resulting in distinct color changes. The presence of bluish, greenish, or grayish colors is characteristic of gleyed soils, indicating a high degree of moisture and anaerobic conditions that favor the formation of reduced iron compounds.

These colors are formed when iron in the soil is chemically reduced, changing from its oxidized form, which is typically reddish-brown, to these duller colors. This process highlights the impact of hydric conditions on soil characteristics and is a key indicator in soil classification and interpretation, especially in contexts related to wetland identification and assessment.

The other options reflect different soil colorations or attributes that are not associated with gleying, reinforcing that bluish, greenish, or grayish colors are distinct markers of this specific soil condition.