Deep Root Irrigation (DRI) began field testing its devices with grapevines in 2011 in Napa Valley, California.
The following year, the company expanded testing to olive trees. Since that time, results consistently have
demonstrated healthy grapevines and fruit and nut trees that thrive on dramatically less irrigation water.
Deep Root Irrigation can use 61.5% less water than does surface drip, according to an independent test. And DRI can achieve 50% soil saturation in half the time that
surface drip requires (see video below). Download a copy of Professional Grower Services’
report on the test’s results.
Time-lapse video compares DRI and surface drip soil saturation levels and the time required to exceed 50%. The soil moisture data were collected by
Sentek™ Drill and Drop soil moisture probes; images of the soil water content were captured by
Sentek’s IrriMAX Live web-based software. For an excellent description of how to interpret the IrriMAX images, see
Sentek’s YouTube video.
An independent study conducted November 5, 2014, by Coastal
Viticultural Consultants found that—even after six hours—increases in soil saturation at levels of up to 48
inches below the surface were significantly greater with the DRI-12 than with a drip irrigation system.
Deep Root Irrigation’s inventor Jeff Ciudaj tested a DRI-12 and a drip irrigation unit installed near each
other and simultaneously operated for 30 minutes, then photographed a cross-section of the soil where each was
placed. The soil around the DRI-12 (see image below left) was significantly more saturated than was the soil
around the drip device (see image below right).