Which color pages in the Munsell Color Book correspond with surface (A) and subsoil (B) horizons?

The correct choice, 10YR, is important because it is the color designation commonly associated with the soil horizon characteristics. The Munsell Color System organizes colors based on hue, value, and chroma, and the 10YR designation – which represents a yellowish hue – is frequently found in the context of both surface (A) and subsoil (B) horizons, thereby reflecting the typical colors observed in these soil layers.

Surface horizons generally exhibit more organic material, influencing their color, while subsoils can present variations depending on mineral content, moisture, and other environmental factors. The 10YR color is notable for its representation in various soils across different regions, which can encompass both the topsoil and lower horizons. This makes it a standard reference point for assessing soil colors in soil evaluations.

In contrast, the other color designations may not be as prevalent or indicative for both horizons combined. Choices like 2.5Y or 5Y might represent lighter or different hues which could apply more specifically in certain conditions or types of soils, but they do not encapsulate the broader spectrum of color typically found in both A and B horizons. Moreover, 7.5YR might be richer or deeper in coloration and may not cover the