Question
Define the soil? Give its composition and functions.
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Answer
The topmost layer of earth’s crust that supports life forms is known as soil. Soil decides the diversity of soil in a area. Soil is composed of $45\%$ minerals, $25\%$ water, $25\%$ air and $5\%$ organic matter. Soil contains small particles or rocks of different sizes, bits of decayed living organisms and various forms of microscopic life. Various functions of soil are:
- It is a habitat to micro organsims like earthworms.
- Soil provides water and minerals to plants to help them grow.
- Apart from these, soil is used in construction purposes.
- Soil is necessary to grow plants and crops.
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