Question

From the following diagram, identify the different layers of soil :

• A. i) - O horizon; ii) - A horizon; iii) - C horizon; iv) - E horizon
• B. i) - A horizon; ii) - B horizon; iii) - C horizon; iv) - R horizon
• C. i) - O horizon; ii) - A horizon; iii) - C horizon; iv) - R horizon
• D. i) - B horizon; ii) - A horizon; iii) - R horizon; iv) - C horizon

Answer 1

The correct option is C i) - O horizon; ii) - A horizon; iii) - C horizon; iv) - R horizon

O horizon is the top layer of the soil which is mostly made up of humus and leaf litter. Below it comes the A horizon which is also called as topsoil. The roots of the plants grows in this layer. This layer is made of minerals and humus. C horizon is the layer below B horizon and above the R horizon. It consists of slightly broken up bedrock. R horizon is the last layer of the soil which is also known as bedrock.