Here's a little something I found that I thought may be usefull. It has PPM to EC conversions, metric to US, and all kinds of helpfull things for growers. I think it's an excellent find and I thought I'd share. :jointsmile:
The file is too big to attach so here's the link. http://pubs.caes.uga.edu/caespubs/pubs/PDF/B931.pdf
