The B horizon lies beneath the A horizon and is commonly referred to as which?

The B horizon lies beneath the A horizon and is commonly referred to as which?

• A. A horizon
• B. O horizon
• C. B horizon
• D. C horizon

Answer: (C)

In soil layering, the surface mineral layer with some organic material is the A horizon. Directly beneath it sits the B horizon, where materials like clay and iron oxides accumulate as they move down from above. This accumulation and the horizon’s more compact, zone-like nature give it the name subsoil, a common way people describe it. Below the B horizon is the C horizon, consisting of weathered parent material, and on top of everything is the O horizon, the organic litter layer. So the layer under the A horizon is the B horizon, the subsoil.

In soil layering, the surface mineral layer with some organic material is the A horizon. Directly beneath it sits the B horizon, where materials like clay and iron oxides accumulate as they move down from above. This accumulation and the horizon’s more compact, zone-like nature give it the name subsoil, a common way people describe it. Below the B horizon is the C horizon, consisting of weathered parent material, and on top of everything is the O horizon, the organic litter layer. So the layer under the A horizon is the B horizon, the subsoil.