Question

Why does humus tend to increase with the clay content of soil?

A.
As the clay content increases, there is more surface area in the soil for organic matter to adsorb to, which decreases the rate of decomposition.
B.
As the clay content increases, the amount of plant lignin in the soil increases.
C.
As the clay content increases, the permeability decreases, which increases the rate of decomposition.
D.
As the clay content increases, there is more surface area in the soil for organic matter to adsorb to, which increases the rate of decomposition.

Answer 1

A.

As the clay content increases, there is more surface area in the soil for organic matter to adsorb to, which decreases the rate of decomposition.

Step-by-step explanation:

This is true because, humus which is the dark rich matter made up of organic matter would be able to be adsorb into the clay content of the soil due to the size of the particles component. The surface area in the soil is a strong factor when compared with other soil type with smaller surface area.