Which materials are identified in the densic horizon?

The densic horizon is characterized by a compacted layer of soil that can restrict water movement and root penetration. This horizon is formed primarily from materials that exhibit a high density and often contains fragments of bedrock or other hard materials.

In this context, the identification of the densic horizon is associated with "Cd," which indicates a densic material that reflects the presence of cemented or hardened layers. This is consistent with the definition of a densic horizon, as it signifies significant physical compaction that may restrict biological activity and influence soil development.

The other materials listed relate to different soil horizon characteristics, such as clay accumulation or organic matter content, which do not define the densic horizon. The inconsistency of their roles in compaction or density explains why they are not relevant to the identification of the densic horizon. Understanding the nature of these materials helps to clarify what defines a densic horizon in soil profiles.