To: North American Fruit Explorers <nafex@lists.ibiblio.org>
Subject: Re: [NAFEX] Chlorosis blueberries - lead in iron sulfate
Date: Wed, 4 Apr 2007 12:01:18 -0400
I appreciate the recommendations to use iron sulfate for chlorosis.
I happened to run across a Minnesota Department of Agriculture,
Pesticide and Fertilizer Management Division publication that lists
heavy metal contaminants of common fertilizers. I was hesitant to use
dry iron sulfate because of the lead content.
Any chemists out there who can comment on these concentrations of lead
in 2 brands of iron sulfate: 219 and 392 ppm? I don't know anything
about plant uptake, bioavailability, long term soil contamination
issues...