What is the substance that makes the soil more fertile called ?

Which of these is a good garden soil ?

Soil is formed by the breaking up of

Which of these has very large grains which do not hold any water between them ?

Which of these make its home in the soil ?

Which soil is used for making toys and other articles ?

Fertility of which soil can be increased by adding humus ?

Loamy soil is very rich and good for the growth of which crop ?

What is the upper layer of the soil called ?

What is the wearing away of soil by wind, rain and running water called ?