Clay and humus particles are referred to as colloids and are less than 0.002mm. Due to their small size, colloids have ________________ surface area which provides surface for adsorption, catalysis, precipitation and microbial colonization:

Question

Accepted Answer

Extremely high. Colloidal particles have a very small size, which results in an extremely high surface area to volume ratio. This large surface area is essential for adsorption and other soil processes.