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2. Soil pH - Wikipedia

   en.wikipedia.org/wiki/Soil_pH

   The buffering of soil pH is often directly related to the quantity of aluminium in soil solution and taking up exchange sites as part of the cation exchange capacity. This aluminium can be measured in a soil test in which it is extracted from the soil with a salt solution, and then is quantified with a laboratory analysis.

3. 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.

4. 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]

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

   www.aol.com/weather/jeremy-rhoden-why-does-soil...

   The University of Florida offers three different soil test options. Soil pH Test: For a very low price, your local Extension office will test your soil pH. To have a test completed, simply collect ...

6. The 2 Best Ways to Test Your Soil pH, According to a ... - AOL

   www.aol.com/lifestyle/2-best-ways-test-soil...

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7. Toxicity characteristic leaching procedure - Wikipedia

   en.wikipedia.org/wiki/Toxicity_characteristic...

   Toxicity characteristic leaching procedure (TCLP) is a soil sample extraction method for chemical analysis employed as an analytical method to simulate leaching through a landfill. The testing methodology is used to determine if a waste is characteristically hazardous, i.e., classified as one of the "D" listed wastes by the U.S. Environmental ...