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soil

SOIL
- Basics and Facts -

 

 

 


Some General Facts  about Soil


 

  • Soil is a living system.
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  • Soil contains 0.01% of the Earth's water.
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  • Soil is 49% Oxygen, 33% Silicone, 7% Aluminum, 4% Iron, and 2% Carbon.
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  • Fifty percent of soil is air and water. The rest is mineral and organic material.
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  • In one gram of soil, the number of bacteria ranges from 100,000 to several billion.
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  • There are 5000 to 7000 different species of bacteria in one gram of soil.
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  • The total living matter in an acre (0.405 hectare) of soil ranges from 230 kg to 9 tons.
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  • Each year, 15 tons of dry soil per acre pass through earthworms. Earthworms eat soil to get the organic materials in it. The rest passes through them. 
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  • Soil develops from geologic materials such as rocks, glacial deposits, granite, limestone, and stream sediments.
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  • Around one acre of land is use to supply the food for each person in the world.