mhagny - 10/9/2011 07:16
soil-life - 10/8/2011 17:28 Personally, I would not spend a Nickle on gypsum. Your issue is NOT excessive Mg. YOUR issue is extremely low P and K. and you are working on that I see. Low Zinc. I would like 4 to 6 ppm. add 30 lbs of Zinc sulfate to your dry blend [. . . ]
I'm assuming that your 4 - 6 ppm Zn refers to the HCL extraction, and not DTPA? (bgunzy's numbers look like DTPA extraction).
And your comment on boron, soil-life -- you are talking hot-water extraction?