Saturated Extract, Electrical Conductance

A saturated soil paste is made by combining deionized water with approximately a 50cc volume of soil. After intermittent stirring and equilibration for 2 hours, the free water is extracted by filtration under a vacuum. Electrical conductance of the filtrate is determined using the Accumet Model 30 conductivity meter, and is expressed as millimhos/cm.

(See Method References No. 15 & 16)