What is Soil Electrical Conductivity (EC)?

Electrical conductivity is one of the most widely used methods to measure soil salinity.

The electrical conductivity (EC) is defined as the ability of a solution to carry an electric current under the action of an applied voltage. The EC depends on several factors, including temperature, pressure and concentration of ions in solution. It is often specified in terms of millimhos per cem (mmhos/cm or mS/cm) or microsiemens per centimetre (μS/cm).

Soil Electrical Conductivity (EC) is a measure of the ability of a soil to conduct an electrical current. It is basically a measurement of the amount of ionized minerals in a soil. When a soil is highly charged with minerals, it will be a better conductor and have a higher EC value.

A high electrical conductivity indicates that water can easily flow through the soil, it has good aeration and drainage. A low electrical conductivity indicates poor drainage and possibly air-filled pores, which make the soil more susceptible to flooding or compaction.

Soil conductivity is an important factor in many agricultural applications, including fertilizer use efficiency and crop yield predictions. It reflects the presence of clay minerals, organic matter, salts, and other substances.