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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. Physical properties of soil - Wikipedia

    en.wikipedia.org/wiki/Physical_properties_of_soil

    Soil bulk density is equal to the dry mass of the soil divided by the volume of the soil; i.e., it includes air space and organic materials of the soil volume. Thereby soil bulk density is always less than soil particle density and is a good indicator of soil compaction. [47] The soil bulk density of cultivated loam is about 1.1 to 1.4 g/cm 3 ...

  4. Soil compaction - Wikipedia

    en.wikipedia.org/wiki/Soil_compaction

    In construction. Soil compaction is a vital part of the construction process. It is used for support of structural entities such as building foundations, roadways, walkways, and earth retaining structures to name a few. For a given soil type certain properties may deem it more or less desirable to perform adequately for a particular circumstance.

  5. Bulk density - Wikipedia

    en.wikipedia.org/wiki/Bulk_density

    The dry bulk density of a soil is inversely related to the porosity of the same soil: the more pore space in a soil the lower the value for bulk density. Bulk density of a region in the interior of the Earth is also related to the seismic velocity of waves travelling through it: for P-waves, this has been quantified with Gardner's relation. The ...

  6. Soil compaction (agriculture) - Wikipedia

    en.wikipedia.org/wiki/Soil_compaction_(agriculture)

    Soil compaction, also known as soil structure degradation, is the increase of bulk density or decrease in porosity of soil due to externally or internally applied loads. [ 1] Compaction can adversely affect nearly all physical, chemical and biological properties and functions of soil. [ 2] Together with soil erosion, it is regarded as the ...

  7. Bulk soil - Wikipedia

    en.wikipedia.org/wiki/Bulk_soil

    Bulk soil is soil outside the rhizosphere that is not penetrated by plant roots. The bulk soil is like an ecosystem, it is made up of many things such as: nutrients, ions, soil particles, and root exudates. There are many different interactions that occur between all the members of the bulk soil. Natural organic compounds are much lower in bulk ...

  8. NJ ANCHOR application guide: Everything you need to know - AOL

    www.aol.com/nj-anchor-application-guide...

    You'll typically need an ANCHOR ID and PIN to access your application. If you didn't receive a mailer or email with this information, you might be able to retrieve it online. Paper Application ...

  9. Soil classification - Wikipedia

    en.wikipedia.org/wiki/Soil_classification

    The most common engineering classification system for soils in North America is the Unified Soil Classification System (USCS). The USCS has three major classification groups: (1) coarse-grained soils (e.g. sands and gravels); (2) fine-grained soils (e.g. silts and clays); and (3) highly organic soils (referred to as "peat").

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