Explain the factors that help in soil formation

Explain the factors that help in soil formation.

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The soil is a living system. It takes millions of years to form soil upto a few cm in depth. Relief, parent rock or bed rock, climate, vegetation and other forms of life and time are important factors in the formation of soil. Various forces of nature such as change in temperature, action of winning water, wind and glaciers, activities of decomposers etc, contribute to the formation of soil. Chemical and organic changes which take place in the soil are equally important soil also consists of organic (humus) and inorganic materials.