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  2. 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 ...

  3. Silt - Wikipedia

    en.wikipedia.org/wiki/Silt

    Silt may occur as a soil (often mixed with sand or clay) or as sediment mixed in suspension with water. Silt usually has a floury feel when dry, and lacks plasticity when wet. Silt can also be felt by the tongue as granular when placed on the front teeth (even when mixed with clay particles). Silt is a common material, making up 45% of average ...

  4. Soil texture - Wikipedia

    en.wikipedia.org/wiki/Soil_texture

    A fourth term, loam, is used to describe equal properties of sand, silt, and clay in a soil sample, and lends to the naming of even more classifications, e.g. "clay loam" or "silt loam". Determining soil texture is often aided with the use of a soil texture triangle plot. [5] An example of a soil triangle is found on the right side of the page.

  5. Unified Soil Classification System - Wikipedia

    en.wikipedia.org/wiki/Unified_Soil...

    The Unified Soil Classification System (USCS) is a soil classification system used in engineering and geology to describe the texture and grain size of a soil. The classification system can be applied to most unconsolidated materials, and is represented by a two-letter symbol. Each letter is described below (with the exception of Pt):

  6. Soil - Wikipedia

    en.wikipedia.org/wiki/Soil

    The effect of pH on a soil is to remove from the soil or to make available certain ions. Soils with high acidity tend to have toxic amounts of aluminium and manganese. [116] As a result of a trade-off between toxicity and requirement most nutrients are better available to plants at moderate pH, [117] although most minerals are more soluble in ...

  7. Soil in the United States - Wikipedia

    en.wikipedia.org/wiki/Soil_in_the_United_States

    Clay particles are finer than silt, being less than 0.002 mm in diameter. Water retention tends to be greater in the finer-textured soils. If a fine-textured soil is well aggregated (with aggregates consisting of numerous organic and inorganic particles bonded together), the large pores between aggregates will facilitate drainage and aeration.

  8. Are Seed Oils Really Killing Us? We Asked the Experts - AOL

    www.aol.com/seed-oils-really-killing-us...

    Technically, a seed oil is a cooking oil made by pressing seeds to extract the fat. But the current pariahs are canola, corn, cottonseed, grapeseed, soy, rice bran, sunflower, and safflower oils.

  9. List of U.S. state soils - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._state_soils

    A state soil is a soil that has special significance to a particular state. Each state in the United States has selected a state soil, twenty of which have been legislatively established. These official state soils share the same level of distinction as official state flowers and birds .

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