Can you post the full test results?  

Can you confirm how much electricity the machine uses and how much is produced?  

What becknology shows in there slides posted above of the 15.5 ppm is way less than 2%.  I have heard of irrigation wells that are several times greater than 15 ppm on Nitrate-N plus Nitrite-N, and they still have to add nitrogen to grow corn. Would not expect any yield increase from applying 280 gallon of 15.5 ppm water, but would expect some increase from 280 gallon of 2% N water