Question

Match the following layers of soil with their respective properties.

• A. Hardest layer
• B. Soft and porous
• C. Lumps of rocks
• D. Retains less water

Answer 1

Based on the texture, colour, depth and chemical composition soil has different layers.
$\bullet$ Uppermost layer is top soil which is soft and porous. It is rich in humus.

$\bullet$ Second layer is sub soil which is hard and compact. It is rich in minerals.

$\bullet$ Third layer is parent rock which is made of lumps of rocks with cracks and crevices.

$\bullet$ Last layer is bed rock which is the hardest layer. It is very difficult to dig this layer with a spade.