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  2. Soil pH - Wikipedia

    en.wikipedia.org/wiki/Soil_pH

    Use of an inexpensive pH testing kit, where in a small sample of soil is mixed with indicator solution which changes colour according to the acidity. Use of litmus paper. A small sample of soil is mixed with distilled water, into which a strip of litmus paper is inserted. If the soil is acidic the paper turns red, if basic, blue.

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

    www.aol.com/best-soil-test-kits-help-202000925.html

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  4. 16 Things You Can Get Free or Cheap at an Extension Office - AOL

    www.aol.com/finance/16-things-free-cheap...

    Find out your soil composition at your county extension office, where you can get a soil sample kit and run soil tests to get expert analysis. Soil testing is often free, though you may pay a ...

  5. Soil test - Wikipedia

    en.wikipedia.org/wiki/Soil_test

    In geotechnical engineering, a soil test can be used to determine the physical characteristics of a soil, such as its water content, void ratio or bulk density. Soil testing can also provide information related to the shear strength, rate of consolidation and permeability of the soil. The following is a non-exhaustive list of engineering soil ...

  6. Proctor compaction test - Wikipedia

    en.wikipedia.org/wiki/Proctor_compaction_test

    Proctor compaction test. The Proctor compaction test is a laboratory method of experimentally determining the optimal moisture content at which a given soil type will become most dense and achieve its maximum dry density. The test is named in honor of Ralph Roscoe Proctor [de], who in 1933 showed that the dry density of a soil for a given ...

  7. Standard penetration test - Wikipedia

    en.wikipedia.org/wiki/Standard_penetration_test

    The standard penetration test (SPT) is an in-situ dynamic penetration test designed to provide information on the geotechnical engineering properties of soil. This test is the most frequently used subsurface exploration drilling test performed worldwide. The test procedure is described in ISO 22476-3, ASTM D1586 [1] and Australian Standards AS ...

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