Will Veris soil EC always correlate with the lab EC analysis of a soil sample?

No. In saline fields, the two sets of data are typically well-correlated, but in non-saline fields there is often no statistically significant correlation. To better understand why Veris soil EC (sometimes referred to as "bulk" soil EC) measurements from non-saline fields often do not correlate with lab EC, it's important to understand how the signal moves through the soil.

Work done by Dr. Jim Rhoades and others at the USDA Salinity Laboratory in Riverside CA, present an EC model that describes conductance along three pathways acting in parallel: (1) conductance through alternating layers of soil particles and their bound soil solution, (2) conductance through continuous soil solution, and (3) conductance through or along surfaces of soil particles in direct contact with each other. When a soil sample is put into solution or a saturated paste, pathways 1 and 3 are virtually eliminated. These are the "soil texture pathways", as soil texture will determine the amount of contact ... more.

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