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  2. Base-cation saturation ratio - Wikipedia

    en.wikipedia.org/wiki/Base-cation_saturation_ratio

    Base-cation saturation ratio (BCSR) is a method of interpreting soil test results that is widely used in sustainable agriculture, supported by the National Sustainable Agriculture Information Service (ATTRA) [1] and claimed to be successfully in use on over a million acres (4,000 km 2) of farmland worldwide.

  3. Aqion - Wikipedia

    en.wikipedia.org/wiki/Aqion

    Version 1.0 was released in January 2012 (after a half-year test run in 2011). The project is active with 1-2 updates per month. ... Online calculator for pH, aqueous ...

  4. Osmotic concentration - Wikipedia

    en.wikipedia.org/wiki/Osmotic_concentration

    Osmotic concentration, formerly known as osmolarity, [1] is the measure of solute concentration, defined as the number of osmoles (Osm) of solute per litre (L) of solution (osmol/L or Osm/L). The osmolarity of a solution is usually expressed as Osm/L (pronounced "osmolar"), in the same way that the molarity of a solution is expressed as "M ...

  5. Soil test - Wikipedia

    en.wikipedia.org/wiki/Soil_test

    A soil test is a laboratory or in-situ analysis to determine the chemical, physical or biological characteristics of a soil. Possibly the most widely conducted soil tests are those performed to estimate the plant-available concentrations of nutrients in order to provide fertilizer recommendations in agriculture.

  6. The Best Soil Test Kits Will Help You Grow Your Perfect Garden

    www.aol.com/lifestyle/best-soil-test-kits-help...

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  7. Plasma osmolality - Wikipedia

    en.wikipedia.org/wiki/Plasma_Osmolality

    Calculated osmolarity = 2 Na + Glucose + Urea (all in mmol/L) As Na+ is the major extracellular cation, the sum of osmolarity of all other anions can be assumed to be equal to natremia, hence [Na+]x2 ≈ [Na+] + [anions] To calculate plasma osmolality use the following equation (typical in the US): = 2[Na +

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