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  2. Topsoil - Wikipedia

    en.wikipedia.org/wiki/Topsoil

    Topsoil is the upper layer of soil. It has the highest concentration of organic matter and microorganisms and is where most of the Earth's biological soil activity occurs. Description. Topsoil is composed of mineral particles and organic matter and usually extends to a depth of 5-10 inches (13–25 cm).

  3. Topsoil Definition & Meaning - Merriam-Webster

    www.merriam-webster.com/dictionary/topsoil

    The meaning of TOPSOIL is surface soil usually including the organic layer in which plants have most of their roots and which the farmer turns over in plowing. How to use topsoil in a sentence.

  4. TOPSOIL Definition & Meaning | Dictionary.com

    www.dictionary.com/browse/topsoil

    The upper portion of a soil, usually dark colored and rich in organic material. It is more or less equivalent to the upper portion of an A horizon in an ABC soil.

  5. TOPSOIL | English meaning - Cambridge Dictionary

    dictionary.cambridge.org/dictionary/english/topsoil

    TOPSOIL definition: 1. (the soil which forms) the top layer of ground in which plants grow 2. (the soil which forms…. Learn more.

  6. Topsoil | Definition, Uses & Importance - Lesson | Study.com

    study.com/academy/lesson/what-is-topsoil-definition-composition-uses.html

    Topsoil is defined as the uppermost layer of natural soil and comprises two soil horizons: A and O. Typically, topsoil can have a thickness of about 4-12 inches. Topsoil contains large...

  7. Topsoil - Vocab, Definition, and Must Know Facts - Fiveable

    library.fiveable.me/key-terms/introduction-botany/topsoil

    Topsoil is the uppermost layer of soil, typically containing a mixture of organic matter, minerals, and nutrients essential for plant growth. This layer plays a critical role in supporting plant life by providing essential resources, facilitating water retention, and housing microorganisms that help decompose organic material and enhance soil ...

  8. Topsoil - Vocab, Definition, and Must Know Facts - Fiveable

    library.fiveable.me/key-terms/environmental-chemistry-ii/topsoil

    Topsoil is the uppermost layer of soil, typically rich in organic matter, nutrients, and microorganisms that are essential for plant growth. This layer plays a critical role in supporting vegetation, water retention, and nutrient cycling, making it vital for agricultural productivity and ecosystem health.

  9. Topsoil | Encyclopedia.com

    www.encyclopedia.com/.../encyclopedias-almanacs-transcripts-and-maps/topsoil

    Topsoil. The upper portion of the soil that is used by plants for obtaining water and nutrients, often referred to as the horizon. Higher levels of organic matter in topsoil cause it to be darker and richer than subsoil and give it greater potential for crop production.

  10. n. The upper layer of soil at a given location, usually containing significantly more organic matter than is found in lower layers. tr.v. top·soiled, top·soil·ing, top·soils. To place topsoil on (land).

  11. Topsoil - Vocab, Definition, and Must Know Facts - Fiveable

    library.fiveable.me/key-terms/introduction-permaculture/topsoil

    Topsoil is the uppermost layer of soil, typically rich in organic matter and nutrients, where most plant roots grow and where soil organisms thrive. It plays a crucial role in supporting plant life, influencing soil structure and composition, and determining overall soil fertility.