Which term describes the vertical division of soil into horizons and contains information about the parent material?

Which term describes the vertical division of soil into horizons and contains information about the parent material?

• A. Soil color
• B. Soil texture
• C. Soil structure
• D. Soil profile

Answer: (D)

The main idea is recognizing the term that describes the vertical arrangement of soil layers and the underlying material. The soil profile is that vertical sequence of horizons—from organic surface layers through mineral horizons to the parent material below. It contains information about how the soil has developed and what the parent material is, which is captured in the deepest horizons. Other terms describe individual properties within a horizon: color relates to organic matter and minerals; texture is about particle size distribution; structure is about how aggregates are arranged. So the soil profile best fits the description because it encompasses the entire vertical layering and the origin material, not just a single property.

The main idea is recognizing the term that describes the vertical arrangement of soil layers and the underlying material. The soil profile is that vertical sequence of horizons—from organic surface layers through mineral horizons to the parent material below. It contains information about how the soil has developed and what the parent material is, which is captured in the deepest horizons. Other terms describe individual properties within a horizon: color relates to organic matter and minerals; texture is about particle size distribution; structure is about how aggregates are arranged. So the soil profile best fits the description because it encompasses the entire vertical layering and the origin material, not just a single property.