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2. Soil pH - Wikipedia

   en.wikipedia.org/wiki/Soil_pH

   The prevailing view in the 1940s and 1950s was that P availability was maximized near neutrality (soil pH 6.5–7.5), and decreased at higher and lower pH. [ 29 ] [ 30 ] Interactions of phosphorus with pH in the moderately to slightly acidic range (pH 5.5–6.5) are, however, far more complex than is suggested by this view.

3. Soil acidification - Wikipedia

   en.wikipedia.org/wiki/Soil_acidification

   Soil acidification is the buildup of hydrogen cations, which reduces the soil pH. Chemically, this happens when a proton donor gets added to the soil. The donor can be an acid , such as nitric acid , sulfuric acid , or carbonic acid .

4. Soil - Wikipedia

   en.wikipedia.org/wiki/Soil

   Soil pH is a function of many soil forming factors, and is generally lower (more acidic) where weathering is more advanced. [ 43 ] Most plant nutrients, with the exception of nitrogen , originate from the minerals that make up the soil parent material.

5. Jeremy Rhoden: Why does soil pH matter to your garden? - AOL

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6. Don't fertilize the trash can: Sampling of soil pH ... - AOL

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7. In situ chemical oxidation - Wikipedia

   en.wikipedia.org/wiki/In_situ_chemical_oxidation

   In situ chemical oxidation (ISCO), a form of advanced oxidation process, is an environmental remediation technique used for soil and/or groundwater remediation to lower the concentrations of targeted environmental contaminants to acceptable levels.

8. Buffer solution - Wikipedia

   en.wikipedia.org/wiki/Buffer_solution

   A buffer solution is a solution where the pH does not change significantly on dilution or if an acid or base is added at constant temperature. [1] Its pH changes very little when a small amount of strong acid or base is added to it. Buffer solutions are used as a means of keeping pH at a nearly constant value in a wide variety of chemical ...

9. Cation-exchange capacity - Wikipedia

   en.wikipedia.org/wiki/Cation-exchange_capacity

   Cation-exchange capacity (CEC) is a measure of how many cations can be retained on soil particle surfaces. [1] Negative charges on the surfaces of soil particles bind positively-charged atoms or molecules (cations), but allow these to exchange with other positively charged particles in the surrounding soil water. [2]