Question

Given figure represents the soil profile, showing different layers/horizons of soil. Which of the following statements regarding the soil profile are not true ?

(i) Maximum roots of plants are found in horizon `A`.
(ii) Maximum nutrients are present in horizon `B`.
(iii) Horizon `B` contains partly weathered rocks.
(iv) Horizon `C` contains roots of the plants and mineral salts.
A. (i) and (ii)
B. (i) and (iii)
C. (ii) and (iv)
D. (i),(ii) and (iii)

Answer 1

Correct Answer - C
Maximum nutrients are found in the uppermost O-horizon. It contains organic matter in various stages of decomposition which produces human. It is a reservoir of plant nutrients. Roots of most of the plants remains restricted to A-Horizon. This is also called top-soil and is rich in microorganisms.