Question

The swelling nature of black cotton soil is primarily due to the presence of

Answer 1

The swelling nature of black cotton soil is primarily due to the presence of Vermiculite

Answer 2

The swelling nature of the black cotton soil can primarily be because of the montmorillonite which is very susceptible to a very substantial amount of water volume which on wntry through lattice structure, swells the grains of the soil.

The montmorillonite in the clay soil has more affinity towards the water