Question

Which of the following situations – ‘A’ or ‘B’ – is advantageous for 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 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.