why soil differ from place to place

why soil differ from place to place

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  -Soil is veryimportant for all living things. - It’s important for plants to grow. -Humans need it to plant different fruits & vegetables.
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  Have you ever wondered how isthe soil formed? My mum told me it is formed by nature. By nature? How? Well, let me show you how.
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  How is thesoil formed? -Rocks can change because of the changes in the weather, like rains & storms & wind. - After a long time, rocks can break into small pieces. - These small pieces are called weathered rocks , they make a part of the soil. 1
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  2 - Also whenanimals & plants die, and we bury them under the ground, after many years they start to decay & break down,, so they also make up a part of the soil.
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  - The soilis made of a mixture of What’s the soil made of? Weathered rocks Humus Minerals - They are formed when the rocks break down into small pieces because of the weather changes. - When animals & plants die & we burry them under the ground, they break down & decay, this is: Humus - They are the nutrients that plants need to grow.
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  Do you know thatthe soil have layers? Really? Let’s dig it & find out the soil layers.
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  Layers of thesoil Sub soill Weathered bed rockl Bed rockl “Rock soil” Top soil
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  1- Top soil -Itis the top layer of the soil. - It’s dark in color. -The humus & minerals are found in this layer.
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  2- Sub soil -Itis under the top soil. - It’s lighter in color than top soil & has less humus.
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  3- Bed rock -Itis the lowest layer of the soil below the sub soil. -It is called: rock soil
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  It grows inthe desert, in the sand No, flowers needs another type of soil to grow
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  Types of thesoil Sand soill Silt soill Clay soill
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  Sand soill - Thesize of the particles of sand are large. - There is too much air space between the sand particles, so water passes fast & it holds very little amount of water. Particles -It is dry soil.
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  Silt soill - Thesize of the particles of silt are smaller than the sand. - There is less air space between the silt particles, so water passes slowly . Particles
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  Clay soill - Thesize of the particles of silt are very small “Cannot be seen by your eyes”. - There is no air space between the clay particles, so water doesn’t pass & the clay holds lots of water inside it. Particles - It’s wet soil.