SOIL FERTILITY

Consider the following statements Low soil fertility in Rainy Tropics can be caused by: 1. high temperature and heavy rainfall 2. eluviations and leaching 3. the existence of an extremely active bacterial life on the forest floor. Of these statements:

Assertion : Humus makes the soil fertile. Reason : Humus is rich in organic matter

Fertility of soil is Increased by-

Loss of fertility of soil is called:

The process of increasing fertility of soil by Earthworms is

Assertion : Repeated muscle expansions and contractions make the earthworm move through the soil. Reason : Earthworms help to make the soil fertile, loose and porous.