Byron- #2 is EC- Electrical Conductivity in millimhos/centimeter Can't help you on the others. Calvin Byron Bromley wrote: > OK here are some questions for the chemist. > > The following is a listing of what is in dairy cow flop in NM. Per NMSU. > > > > EC (mmhos/cm) 15.9 > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > Question #1 > > What is kjeldahl Nitrogen ? > > Question #2 > > what is EC (mmhos/cm) ? > > Question #3 > > At what level does Aluminum and sodium cause problems? > > Question #4 > > How does one compare the "Commercial" fertilizers like 5-1-1, 5-10-10 or > 15-35-15 to this type of numbering sysytem. > > Just trying to learn something to new to grow better chiles > > Byron