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Sulfates, potassium, and magnesium
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soil-life
Posted 10/10/2011 12:23 (#1998200 - in reply to #1996338)
Subject: Re: potential confusion on Zn levels due to extraction method


North Central Ohio, across the Corn belt !

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? 

All by Mehlich-3 extraction  Matt

A & L Great lakes Laboratory

Fort Wayne Indiana

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