If peat has a CEC of 125 cmoles/Kg, how many grams of urea would it take to completely saturate the cation exchange sites of one kilogram of peat? What is the best way to do this? Steve P in Vancouver _______________________________________________ Aquatic-Plants mailing list Aquatic-Plants at actwin_com http://www.actwin.com/mailman/listinfo.cgi/aquatic-plants