Question

Fertile soil has lots of humus. Why?

Answer 1

Fertile soil possess lots of humus because (i) Humus is required for binding soil particles into crumbs. Crumbs
formation is needed for both hydration and aeration of soil. (ii) Humus makes the soil porous for easy passage of roots. (iii) It is source of minerals. (iv) Humus contains chemicals that promote growth of plants.