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Re: [NAFEX] Chlorosis blueberries - lead in iron sulfate

From: Hilborn.E@epamail.epa.gov
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.

http://www.mda.state.mn.us/fertilizer/heavymetals2002.pdf

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...

Betsy Hilborn 7a

[NAFEX] Chlorosis blueberries, Hilborn . E, 04/04/2007
- Message not available
  - Re: [NAFEX] Chlorosis blueberries, Lucky Pittman, 04/04/2007
    - Re: [NAFEX] Chlorosis blueberries, Scott Williamson, 04/04/2007
      - Re: [NAFEX] Chlorosis blueberries - lead in iron sulfate, Hilborn . E, 04/04/2007
- Re: [NAFEX] Chlorosis blueberries, Lee Reich, 04/04/2007
  - Re: [NAFEX] Chlorosis blueberries, Hilborn . E, 04/04/2007