Double Coulters move through the soil to deliver the electric impulses which creates a treated zone in the soil - approximately 3'' wide by 6'' deep.  The fertilizer is then delivered into the center of this safe zone where bacteria will not convert it to nitrate.  Bacteria will repropagate from the sides of this treated zone and will be flushed into the zone with rainfall.  After about 60 days, depending upon external environmental factors, the treated zone will have normal levels of bacteria and the nitrification process will resume.  This allows time for the crop to grow and use the applied nitrogen before it can be leached out of the soil or lost to denitrification.