Question

Why is the soil in temperate forests thick and fertile?

Answer 1

It's because of humus.

Explanation:

The soil in temperate forests are thick and fertile as the forest floor is covered by trees and there is a vast wildlife. It's covered with the dead parts of plants and animals and, the decomposers act on the dead and decaying matter and turn it into useful nutrients or organic manure. Thus the humus collection is more and the soil is more fertile.