What distinguishes orthstein from placic horizons?

Orthstein and placic horizons are both recognized soil features, but they have distinct characteristics that help in differentiating them. The key distinguishing feature of orthstein is its thickness, which is typically over 25 mm. This thickness facilitates the identification of orthstein as a distinct horizon. Additionally, orthstein horizons are often more heavily compacted and cemented due to processes like iron accumulation, contributing to their significant thickness.

On the other hand, placic horizons are recognized more by their physical and chemical properties, such as the presence of cemented material and their relationship to groundwater. However, the thickness is what primarily sets orthstein apart—having a requisite depth that needs to be met for accurate classification.

Understanding the distinguishing characteristics like thickness enhances the ability to identify specific soil horizons accurately during soil judging, contributing to better soil management and understanding of land properties.