About the Machine
This is the world's first commercially available on-the-go sensor for soil pH—or for any soil chemical property. How it works is surprisingly simple, in fact it has only one moving part—a soil sampler shoe. Think of it like a large soil probe on its side. When the hydraulic cylinder pushes it in the ground, soil flows through. When the cylinder picks up the shoe, the soil in the shoe trough is pressed against pH electrodes. After a few seconds the shoe is lowered again to collect more soil. As it does, the new soil coming in moves the previous soil sample out the back of the shoe trough—and spray nozzles clean the pH electrodes. The shoe raises, and the process is repeated—with no action from the operator and no stopping. The Veris Machine takes approximately 10 samples per acre creating an accurate map of pH variability.
As the Veris Machine is pulled through the field it also measures the E.C. of the soil. Soil EC is soil electrical conductivity– a measurement of how much electrical current soil can conduct. It's an effective way to map soil texture because smaller soil particles such as clay conduct more current than larger silt and sand particles. Soil EC measurements have been used since the early 1900's--Veris mobilized the process and added GPS. As the Veris EC cart is pulled through the field, one pair of coulter-electrodes injects a known voltage into the soil, while the other coulter-electrodes measure the drop in that voltage. The result: a detailed map of the soil texture variability in the crop rooting zone.