Question

The O$_a$ sub-horizon denotes-

• A. Organic horizon with highly decomposed organic matter
• B. Organic horizon with intermediately decomposed organic matter
• C. Organic horizon with least decomposed organic matter
• D. Organic horizon without decomposed organic matter

Hint:

Remember: “a” stands for advanced decomposition in the O-horizon classification.

Answer 1

The Correct Option is A

The O$_a$ horizon consists of well-decomposed organic matter, indicating advanced stages of decomposition, and typically appears dark and homogeneous.