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2. Base-cation saturation ratio - Wikipedia

   en.wikipedia.org/wiki/Base-cation_saturation_ratio

   Base-cation saturation ratio (BCSR) is a method of interpreting soil test results that is widely used in sustainable agriculture, supported by the National Sustainable Agriculture Information Service (ATTRA) [1] and claimed to be successfully in use on over a million acres (4,000 km 2) of farmland worldwide.

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. International Soil Reference and Information Centre - Wikipedia

   en.wikipedia.org/wiki/International_Soil...

   ISRIC - World Soil Information, also known as the International Soil Reference and Information Centre, is a science-based independent foundation.It was established in 1966, following a recommendation by the International Society of Soil Science (ISSS, now known as the International Union of Soil Sciences (IUSS)) and the United Nations Educational, Scientific and Cultural Organization (UNESCO). [1]

5. Newmark's influence chart - Wikipedia

   en.wikipedia.org/wiki/Newmark's_influence_chart

   Count the number of elements (M) of the chart enclosed by the plan of the loaded area. The formula used to solve for the increase in pressure at the point being considered is 〖∆σ〗_z = (IV)qM, where IV = influence value, q = pressure on the loaded area, and M = number of elements enclosed by loaded area. [1]

6. Soil survey - Wikipedia

   en.wikipedia.org/wiki/Soil_survey

   The most current soil survey data is made available for high end GIS users such as professional consulting companies and universities. Typical information in a published county soil survey includes the following: [1] a brief overview on how to use the survey; a general soil map for comparing the sustainability of large sections of the county

7. National Cooperative Soil Survey - Wikipedia

   en.wikipedia.org/wiki/National_Cooperative_Soil...

   The National Cooperative Soil Survey Program (NCSS) in the United States is a nationwide partnership of federal, regional, state, and local agencies and institutions. This partnership works together to cooperatively investigate, inventory, document, classify, and interpret soils and to disseminate, publish, and promote the use of information about the soils of the United States and its trust ...

8. Water retention curve - Wikipedia

   en.wikipedia.org/wiki/Water_retention_curve

   Water retention curve is the relationship between the water content, θ, and the soil water potential, ψ. The soil moisture curve is characteristic for different types of soil, and is also called the soil moisture characteristic. It is used to predict the soil water storage, water supply to the plants (field capacity) and soil aggregate stability.

9. Cone penetration test - Wikipedia

   en.wikipedia.org/wiki/Cone_penetration_test

   The test method consists of pushing an instrumented cone, with the tip facing down, into the ground at a controlled rate (controlled between 1.5 -2.5 cm/s accepted). The resolution of the CPT in delineating stratigraphic layers is related to the size of the cone tip, with typical cone tips having a cross-sectional area of either 10 or 15 cm 2 ...