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  2. Topsoil - Wikipedia

    en.wikipedia.org/wiki/Topsoil

    Topsoil is composed of mineral particles and organic matter and usually extends to a depth of 5-10 inches (13–25 cm). Together these make a substrate capable of holding water and air which encourages biological activity. There are generally a high concentration of roots in topsoil since this is where plants obtain most of their vital nutrients.

  3. Dillo Dirt - Wikipedia

    en.wikipedia.org/wiki/Dillo_Dirt

    Dillo Dirt. Dillo Dirt is a compost made by the City of Austin, Texas since 1989. It was the first program of its kind in the state and one of the oldest in the nation. [1] Dillo Dirt is named after the nine-banded armadillo (Dasypus novemcinctus), which is a mammal native to Texas. It is also a trademarked product of the City of Austin Water ...

  4. Structural Soil - Wikipedia

    en.wikipedia.org/wiki/Structural_Soil

    Structural Soil is a medium that can be compacted to pavement design and installation requirements while permitting root growth. It is a mixture of gap-graded gravels (mostly made of crushed stone) and soil (mineral content and organic content). It provides an integrated, root penetrable, high strength pavement system that shifts design away ...

  5. Fill dirt - Wikipedia

    en.wikipedia.org/wiki/Fill_dirt

    Fill dirt is usually subsoil (soil from beneath topsoil) and underlying soil parent material which has little soil organic matter or biological activity. Fill dirt is taken from a location where soil is being removed as a part of leveling an area for construction; it may also contain sand, rocks, and stones, as well as earth.

  6. Soil contamination - Wikipedia

    en.wikipedia.org/wiki/Soil_contamination

    Municipal and industrial wastes contribute most to soil contamination (38%), followed by the industrial/commercial sector (34%). Mineral oil and heavy metals are the main contaminants contributing around 60% to soil contamination. In terms of budget, the management of contaminated sites is estimated to cost around 6 billion Euros (€) annually ...

  7. Landfill - Wikipedia

    en.wikipedia.org/wiki/Landfill

    Ecology portal. v. t. e. A landfill[ a] is a site for the disposal of waste materials. It is the oldest and most common form of waste disposal, although the systematic burial of waste with daily, intermediate and final covers only began in the 1940s. In the past, waste was simply left in piles or thrown into pits (known in archeology as middens ...

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