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  2. Soil is the biologically active and porous medium that has developed in the uppermost layer of Earths crust. It serves as the reservoir of water and nutrients and a medium for the filtration and breakdown of injurious wastes. It also helps in the cycling of carbon and other elements through the global ecosystem.

  3. What is Soil? - Natural Resources Conservation Service

    www.nrcs.usda.gov/resources/education-and-teaching-materials/what-is-soil

    Soils perform vital functions to sustain plant and animal life, regulate water flow, filter and buffer pollutants, cycle nutrients, and provide physical stability and sort. This definition is from the Soil Science Society of America.

  4. Soil - Wikipedia

    en.wikipedia.org/wiki/Soil

    Soil, also commonly referred to as earth, is a mixture of organic matter, minerals, gases, liquids, and organisms that together support the life of plants and soil organisms. Some scientific definitions distinguish dirt from soil by restricting the former term specifically to displaced soil.

  5. Soil Basics | Soil Science Society of America

    www.soils.org/about-soils/basics

    In short, soil is a mixture of minerals, dead and living organisms (organic materials), air, and water. These four ingredients react with one another in amazing ways, making soil one of our planet’s most dynamic and important natural resources. Soil is used by people in numerous ways.

  6. All About Soil - Soils 4 Kids

    www.soils4kids.org/about

    What is Soil? Soils are complex mixtures of minerals, water, air, organic matter, and countless organisms that are the decaying remains of once-living things. It forms at the surface of land – it is the “skin of the earth.” Soil is capable of supporting plant life and is vital to life on earth.

  7. What Are Soils? | Learn Science at Scitable - Nature

    www.nature.com/scitable/knowledge/library/what-are-soils-67647639

    Soils are dynamic and diverse natural systems that lie at the interface between earth, air, water, and life. They are critical ecosystem service providers for the...

  8. What is Soil? Technically, the soil is a mixture that contains minerals, organic matter, and living organisms. But broadly speaking, soil can refer to any loose sediment. Moreover, there are many types of soil that are distributed around the world and these are generally classified into the following: Clay Soil; Sandy soil; Loamy Soil; Silt Soil

  9. Soil - Formation, Composition, Structure | Britannica

    www.britannica.com/science/soil/Soil-formation

    The evolution of soils and their properties is called soil formation, and pedologists have identified five fundamental soil formation processes that influence soil properties. These five “state factors” are parent material, topography, climate, organisms, and time.

  10. What is soil? Soil is a mixture of minerals, dead and living organisms (organic materials), air, and water. These four ingredients react with one another in amazing ways, making soil one of our planet’s most dynamic and important natural resources. Soil is used by people in many ways.

  11. What is soil? | Britannica

    www.britannica.com/question/What-is-soil

    Soil is the biologically active and porous medium that has developed in the uppermost layer of Earth’s crust. It serves as the reservoir of water and nutrients and a medium for the filtration and breakdown of injurious wastes.