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  2. Sheet mulching - Wikipedia

    en.wikipedia.org/wiki/Sheet_mulching

    A layer (around 10 cm thick) of weed-free soil, rich in nutrients is added, in an attempt to mimic the surface soil, or A horizon. [4] A layer (at most 15 cm thick) of weed-free, woody and leafy matter is added in an attempt to mimic the forest floor, or O horizon. Theoretically, the soil is now ready to receive the desirable plant seeds or ...

  3. Stonelayer - Wikipedia

    en.wikipedia.org/wiki/Stonelayer

    A stonelayer, or soil stonelayer, or stone line, is a three-dimensional subsurface layer, or soil horizon, dominated by coarse particles (>2mm), that generally follows (mimics) the surface topography (Sharpe 1938).

  4. Daily cover - Wikipedia

    en.wikipedia.org/wiki/Daily_cover

    The daily cover on an operational landfill site is the layer of compressed soil or earth which is laid on top of a day's deposition of waste. Benefits of using daily cover include: [1] Reduction of odor and air emissions; Control of disease vectors (birds, insects, and rodents) Improved surface stability for landfill vehicles; Control of litter

  5. Hardpan - Wikipedia

    en.wikipedia.org/wiki/Hardpan

    In soil science, agriculture and gardening, hardpan or soil pan is a dense layer of soil, usually found below the uppermost topsoil layer. [1] There are different types of hardpan, all sharing the general characteristic of being a distinct soil layer that is largely impervious to water .

  6. Solum - Wikipedia

    en.wikipedia.org/wiki/Solum

    Arawak soil series. St. Croix, U.S. Virgin Islands. Solum depth is 11 inches and soil depth is 14 inches. The solum (plural, sola) in soil science consists of the surface and subsoil layers that have undergone the same soil forming conditions. The base of the solum is the relatively unweathered parent material. Solum and soils are not synonymous.

  7. Fragipan - Wikipedia

    en.wikipedia.org/wiki/Fragipan

    A fragipan is a diagnostic horizon in USDA soil taxonomy. They are altered subsurface soil layers that restrict water flow and root penetration. Fragipans are similar to a duripan in how they affect land-use limitations. In soil descriptions, they are commonly denoted by a Bx or Btx symbol. They often form in loess ground. [1]

  8. Soil horizon - Wikipedia

    en.wikipedia.org/wiki/Soil_horizon

    A soil layer is a zone in the soil, approximately parallel to the soil surface, with properties different from layers above and/or below it. If at least one of these properties is the result of soil-forming processes, the layer is called a soil horizon. In the following, the term layer is used to indicate the possibility that soil-forming ...

  9. Subsoil - Wikipedia

    en.wikipedia.org/wiki/Subsoil

    Subsoil layer. Subsoil is the layer of soil under the topsoil on the surface of the ground. Like topsoil, it is composed of a variable mixture of small particles such as sand, silt and clay, but with a much lower percentage of organic matter and humus. The subsoil is labeled the B Horizon in most soil mapping systems.

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