Question

Which of the following situations – ‘A’ or ‘B’ – is advantageous for the absorption of water and minerals? Why?

Situation ‘A’: Growth and branching of roots in the C-horizon.

Situation ‘B’: Growth and branching of roots in A and B horizons.

Answer 1

Situation B is advantageous to plants because A and B horizons are humus-rich regions and humus improves the texture of the soil, increases the water-holding capacity of soil and provides nutrients for the growth of plants. Minerals are also present in A and B horizons. Humus and minerals make the soil fertile and help in the growth of plants. So growth and branching of roots in A and B – horizons are advantageous for the absorption of water and ( minerals by plants.