Why didn't a chelated trace element mix total up to 100%? ie 7%Fe 1.3%B 2%Mn 0.06%Mo 0.4%Zn 0.1%Cu EDTA DTPA Does the remaining 89.14% is made up of EDTA + DTPA. Somebody please point a URL that explain what the heck is EDTA and/or DTPA. Or is it simple enough for somebody to briefly describe it here? rgds.