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Soil - Coggle Diagram
Soil
Physical characteristics
Clayey soil
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Clayey soil has very small particles. There is very less space between them because they are tightly packed together. That's why there's not much air inside the soil. However, clayey soil can absorb and hold water easily that's why clayey soil can become waterlogged. Clayey soil cracks out in dry and hot weather.
Sandy Soil
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Sandy soil has large particles. There is a lot of space between the particles. Air and water can get into the spaces between those particles. This means that sandy soil has a lot of water and air but the water can drain easily through the gaps in the particles.
Loamy soil
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Loamy soil is a mixture of sand and clay, so it has big as well as small particles. The space between them is neither too big, nor too small, that's why there is air in the spaces. It has enough moisture and drains well too. The dark brown colour in loamy soil occurs due to the organic matter inside the soil which helps the soil hold water and gives it a lot of nutrients. That's why loamy soil has the best composition for plants to grow.
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How is soil formed?
Weathering
Man-made Weathering
Construction: During construction, rocks can accidentally be destroyed
Mining: During mining, rocks are broken and mined purposefully to get precious materials.
Chemical Weathering
Acid rain: Acid rain due to harmful gases in the atmosphere weakens rocks and eventually breaks them.
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Physical Weathering
Water gets into the crack, freezes and widens it. This repeats to break the rock.
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