Question

Which of these options correctly describes the layer of the soil profile?

a) A – horizon – hardest layer

b) C – horizon – highest amount of humus

c) B – horizon – lesser humus but more minerals

d) Bedrock – porous and can retain maximum water​

Answer 1

Answer:

Which of these options correctly describes the layer of the soil profile?

a) A – horizon – hardest layer

b) C – horizon – highest amount of humus

c) B – horizon – lesser humus but more minerals

d) Bedrock – porous and can retain maximum water​

Answer 2

(c) B-horizon-lesser humus but more minerals correctly describes the layer of the soil profile.

Explanation:

• The topmost layer of earth's crust is soil profile and it is composed of organic minerals and rocks.
• A soil profile is the vertical section and it is made up of layers called soil horizons.
• There are three layers of soil, topsoil, subsoil, parent rock.
• A-horizon or topsoil is also known as humus layer and it has more minerals.
• Horizon B or subsoil lies below the topsoil and it is harder and compact.
• Horizon B contains less humus but it has more minerals.
• Horizon C or bedrock is the parent rock and it has no organic matter.
• Therefore, option c is correct.