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How much Fe in FeEDTA?

To: <Aquatic-Plants at actwin_com>
Subject: How much Fe in FeEDTA?
From: "Hong, Sungmin" <pongpong at mail_taegu.net>
Date: Wed, 9 Dec 1998 01:10:20 +0900

What's the fraction Fe by FeEDTA?
I have some FeEDTA, CuSO4+5H2O, ZnSO4+7H2O, H3BO3 and sources of Mo, Mn.
What do they use for Mo an Mn source in hydroponics?

EDTA has 4H's, 4O's 2N's. but when it form FeEDTA, it lose it's four H's.
and it become   ? + [Fe(+3)(EDTA)]-
if so... then what do they use for cation?
Na? K?

Help me.... please...

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