Question

Question 13

Locate the following zones given as boxed items in Figure 9.1 which shows a diagram of the soil profile.

$\begin{array}{c}Topsoil,Subsoil,C-horizon,Bedrock\end{array}$

Answer 1

(i) Topsoil (A Horizon): It is called the topsoil. It forms the uppermost horizon. It is rich in humus and minerals and is dark in colour. This layer is soft, porous and can retain more water.

(ii) Subsoil (B Horizon): It is called the middle layer. It is harder and compact. It has a lesser amount of humus but more of minerals.

(iii) C Horizon: It is made up of small lumps of rocks with cracks and crevices.

(iv) Bedrock: It is the bottom-most layer. It is made up of hard rocks and hence this layer is very hard and difficult to dig further.