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2. 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.

3. List of U.S. state soils - Wikipedia

   en.wikipedia.org/wiki/List_of_U.S._state_soils

   This is a list of U.S. state soils. A state soil is a soil that has special significance to a particular state. Each state in the United States has selected a state soil, twenty of which have been legislatively established. These official state soils share the same level of distinction as official state flowers and birds.

4. List of state soil science licensing boards - Wikipedia

   en.wikipedia.org/wiki/List_of_State_Soil_Science...

   This is a complete list of soil science licensing boards in the United States. State licensing in this context refers to any state regulatory program which limits the professional practice of soil science within state jurisdiction to individuals qualified by the state.

5. Geotechnical investigation - Wikipedia

   en.wikipedia.org/wiki/Geotechnical_investigation

   This test is used by Caltrans for pavement design, replacing the California bearing ratio test. Soil compaction tests Standard Proctor (ASTM D698), Modified Proctor (ASTM D1557), and California Test 216. These tests are used to determine the maximum unit weight and optimal water content a soil can achieve for a given compaction effort.

6. San Joaquin (soil) - Wikipedia

   en.wikipedia.org/wiki/San_Joaquin_(soil)

   San Joaquin soil profile San Joaquin soil landscape. San Joaquin is an officially designated state insignia, the state soil of the U.S. state of California.. The California Central Valley has more than 500,000 acres (2,000 km 2) of San Joaquin soils, named for the south end of that valley.

7. Scientists link surge in heavy metals in soil to California ...

   www.aol.com/scientists-surge-heavy-metals-soil...

   Scientists at San Jose State University say that a large fire that burned at a battery plant in Monterrey County, California earlier this month has left heightened levels of heavy metals in a ...