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  2. Soil pH - Wikipedia

    en.wikipedia.org/wiki/Soil_pH

    Then, using the initial soil pH and the aluminium content, the amount of lime needed to raise the pH to a desired level can be calculated. [ 68 ] Amendments other than agricultural lime that can be used to increase the pH of soil include wood ash , industrial calcium oxide ( burnt lime ), magnesium oxide , basic slag ( calcium silicate ), and ...

  3. Topsoil - Wikipedia

    en.wikipedia.org/wiki/Topsoil

    Topsoil is also used for proper surface grading near residential buildings. In order to protect against flooding the International Residential Code requires a 2% slope (2.4 in (61 mm)) for the first ten feet away from the home. [12] Energy Star requires a rate of 0.5 in/ft (42 mm/m).

  4. Soil test - Wikipedia

    en.wikipedia.org/wiki/Soil_test

    In agriculture, a soil test commonly refers to the analysis of a soil sample to determine nutrient content, composition, and other characteristics such as the acidity or pH level. A soil test can determine fertility , or the expected growth potential of the soil which indicates nutrient deficiencies, potential toxicities from excessive ...

  5. Soil - Wikipedia

    en.wikipedia.org/wiki/Soil

    A pH of 9.5 has 10 −9.5 moles hydronium ions per litre of solution (and also 10 −2.5 moles per litre OH −). A pH of 3.5 has one million times more hydronium ions per litre than a solution with pH of 9.5 (9.5 − 3.5 = 6 or 10 6) and is more acidic. [115] The effect of pH on a soil is to remove from the soil or to make available certain ions.

  6. Physical properties of soil - Wikipedia

    en.wikipedia.org/wiki/Physical_properties_of_soil

    The measures of consistency border on subjective compared to other measures such as pH, since they employ the apparent feel of the soil in those states. The terms used to describe the soil consistency in three moisture states and a last not affected by the amount of moisture are as follows:

  7. Moss lawn - Wikipedia

    en.wikipedia.org/wiki/Moss_lawn

    Moss lawns do not require fertilizer or other soil amendments, as moss lacks a root system. [1] [2] Moss lawns do not need mowing, although there are a few species which can be mown. [10] While moss requires some moisture, its water demands are moderate; one percent or less of the water needed by an average US grass lawn. [1]