What is the appropriate action if the lower boundary of a soil horizon is found at 75 cm?

In soil profiling, when identifying soil horizons, it is essential to recognize and accurately describe the boundaries between different layers. If the lower boundary of a soil horizon is encountered at 75 cm, it indicates that this specific horizon ends at that depth.

Using the horizon that ends there is the appropriate action because it reflects the natural stratification of the soil. Each horizon has distinct characteristics that contribute to its identity, and properly recognizing their boundaries is crucial for accurate soil classification and understanding the soil profile.

Selecting this option demonstrates an acknowledgment of the defined limits of the horizon you are examining, ensuring that your soil study reflects the true layering of the profile. Ignoring this horizon or continuing deeper without recognizing the 75 cm boundary could lead to incomplete or inaccurate data regarding soil characteristics.