What are the factors to make …

The outer layer of the earth is formed of soil. So when we fall on the ground, our clothes get dirty because of soil. Its thickness varies from few millimeters to several meters. Soil formation occurs as a result of a gradual breakdown of rocks. Rocks are broken down into finer particles through many processes such as weathering and erosion. The geological components are mixed with organic materials to form soil. This implies that it is a mixture of rocks which are broken into smaller particles and the dead and decayed organic matter along with the little microbes.

Plants do not grow in the sand because pure sand is only rock particulate matter and it does not contain the minerals required for the proper growth of plants. Sand can be converted into soil by adding organic matter to it. There are two main components of soil, the rock particles and the organic matter. Soil also has a lifecycle of its own. Formation of soil starts with the disintegration of rocks under certain environmental conditions.