Wow I’ve never heard as high as 70%! Do you know if the uptake increase differs depending on the product that you are using? Fertilizer, chemical, bios? I have always heard roughly 30% uptake efficiency. We were finally able to get control of Japanese Knotweed last season with one application of 2-4D, Mecoprop and Dicamba at regular label rate when mixing with fulvic acid where in the past it took multiple applications without still having guaranteed success.