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2. Have you tested your garden soil? Here's what you should know

   www.aol.com/tested-garden-soil-heres-know...

   Ohio State University Extension in Franklin County provides soil testing services for gardeners and farmers. For information about purchasing soil sample kits, go to go.osu.edu/franklinsoiltesting .

3. Soil test - Wikipedia

   en.wikipedia.org/wiki/Soil_test

   The test is used to mimic the function of roots to assimilate minerals. The expected rate of growth is modeled by the Law of the Maximum. [1] Labs, such as those at Iowa State and Colorado State University, recommend that a soil test contains 10-20 sample points for every 40 acres (160,000 m 2) of field.

4. 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 ...

5. Geotechnical investigation - Wikipedia

   en.wikipedia.org/wiki/Geotechnical_investigation

   A soil sample recovered from a test boring using a split spoon sampler. Borings come in two main varieties: large diameter and small diameter. Large-diameter borings are rarely used because of safety concerns and expense but are sometimes used to allow a geologist or an engineer to visually and manually examine the soil and rock stratigraphy in-situ.

6. Pennsylvania State University Applied Research Laboratory

   en.wikipedia.org/wiki/Pennsylvania_State...

   Website. www.arl.psu.edu. The Pennsylvania State University Applied Research Laboratory (short: Penn State ARL or simply ARL), is a specialized research unit dedicated to interdisciplinary scientific research at the Penn State University Park campus. The ARL is a DoD designated U.S. Navy University Affiliated Research Center.

7. Cone penetration test - Wikipedia

   en.wikipedia.org/wiki/Cone_penetration_test

   Symbol used in drawings. Simplified version of a cone penetrometer. The cone penetration or cone penetrometer test (CPT) is a method used to determine the geotechnical engineering properties of soils and delineating soil stratigraphy. It was initially developed in the 1950s at the Dutch Laboratory for Soil Mechanics in Delft to investigate soft ...