What is electrical conductivity?
A more common measure of salts in the soil and water for agriculture scientists is electrical conductivity. This is a measure of how much electric current will flow through water at a specific voltage. The more salts in water, the more current will flow through that water. You will see water described as having an “electrical conductivity of 1.5 dS/m”, or simply ECw = 1.5 dS/m (dS/m stands for deci-Siemens of electrical conductivity per meter of water). An approximate conversion between concentration and electrical conductivity is that 640 ppm TDS (parts per million total dissolved solids) = 1 dS/m.
