Articles

dielectric permittivity

Dielectric Relaxation of Bound Water versus Soil Matric Pressure

The dielectric permittivity of soil is a function of the water content, which facilitates water content measurements. The permittivity of soil is also a function of the frequency of the applied electric field. This frequency dependence can be described by ...
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bulk EC

Salinity / Electrical Conductivity (EC)

Electrical conductivity (EC) is the most common measure of soil salinity and is indicative of the ability of an aqueous solution to carry an electric current.  Soil salinity refers to dissolved salts such as sodium chloride, calcium chloride and magnesium ...
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acidic soil

Soil pH

Soil pH defines the relative acidity or alkalinity of the soil solution. The pH scale in natural systems ranges from 0 to 14. A pH value of 7.0 is neutral. Values below 7.0 are acid and those above 7.0 are ...
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apparent permittivity

Dielectric Permittivity

Dielectric permittivity (ε) is grounded in complex physics but in simple terms it can be described as the ability of a substance to hold an electrical charge. The dielectric constant (Ka) is the ratio of the permittivity of a substance ...
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field capacity

Soil Matric Potential

Capillary matric potential is sometimes referred to as tension or pressure head (ψ, hPa) is the cohesive attractive force between a soil particle and water in the pore spaces in the soil particle/water/air matrix. Typical ranges are 0 to 10,000,000 ...
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horizons

Soil Horizons

Soil horizons are distinct layers of soil that form naturally in undisturbed soil over time. The formation of soil horizons is called soil geomorphology and the types of horizons are indicative of the soil order. Like other natural processes, the ...
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clay

Soil Textures

Soil texture refers to the composition of the soil in terms of the amounts of small (clays), medium (silts), and large (sands) size particles. The primary particles of sand, silt, and clay make up the inorganic solid phase of the ...
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hierarchical soil classification

Soil Orders and Taxonomy

Soil, just like plants and animals, has been broken down by scientists into a hierarchical classification system, which is as follows: orders, suborders, great group, subgroup, family, and series. While there are thousands of types of soil around the world, ...
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