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  2. Substrate (aquarium) - Wikipedia

    en.wikipedia.org/wiki/Substrate_(aquarium)

    For freshwater aquaria, gravel is the most common substrate. To prevent damage to fish, gravel should not be sharp. Aquarium gravel can be as coarse as pea-sized or as fine as 1–2 mm. [1] It is available in a number of colors, and may be naturally colored or dyed, and may have a polymer seal to ensure it does not affect water chemistry. [1]

  3. Ultisol - Wikipedia

    en.wikipedia.org/wiki/Ultisol

    Ultisol, commonly known as red clay soil, is one of twelve soil orders in the United States Department of Agriculture soil taxonomy. The word "Ultisol" is derived from "ultimate", because Ultisols were seen as the ultimate product of continuous weathering of minerals in a humid, temperate climate without new soil formation via glaciation .

  4. Palygorskite - Wikipedia

    en.wikipedia.org/wiki/Palygorskite

    Palygorskite (Russian: Палыгорскит) or attapulgite is a magnesium aluminium phyllosilicate with the chemical formula (Mg,Al) 2 Si 4 O 10 (OH)·4(H 2 O) that occurs in a type of clay soil common to the Southeastern United States. It is one of the types of fuller's earth.

  5. Soil matrix - Wikipedia

    en.wikipedia.org/wiki/Soil_matrix

    In soils, clay is a soil textural class and is defined in a physical sense as any mineral particle less than 2 μm (8 × 10 −5 in) in effective diameter. Many soil minerals, such as gypsum , carbonates, or quartz, are small enough to be classified as clay based on their physical size, but chemically they do not afford the same utility as do ...

  6. Fuller's earth - Wikipedia

    en.wikipedia.org/wiki/Fuller's_earth

    The English name reflects the historical use of the material for fulling (cleaning and shrinking) wool, by textile workers known as fullers. [1] [2] [3] In past centuries, fullers kneaded fuller's earth and water into woollen cloth to absorb lanolin, oils, and other greasy impurities as part of the cloth finishing process.

  7. Physical properties of soil - Wikipedia

    en.wikipedia.org/wiki/Physical_properties_of_soil

    Soil texture is determined by the relative proportion of the three kinds of soil mineral particles, called soil separates: sand, silt, and clay. At the next larger scale, soil structures called peds or more commonly soil aggregates are created from the soil separates when iron oxides, carbonates, clay, silica and humus, coat particles and cause ...

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Fishing Creek (North Branch Susquehanna River tributary)

    en.wikipedia.org/wiki/Fishing_Creek_(North...

    The water quality of Fishing Creek can vary. Its pH ranges from 4.9 to 8.5, while the concentration of dissolved oxygen ranges from 5 to 17.5 mg per liter. The creek's average discharge is 615 cubic feet per second (17.4 m 3 /s); its watershed contains gravel, shale and various loams—in particular the Albrights soil series and the Leck Kill soil.

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