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Old 03-31-2014, 11:43 AM
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Georgia Lawn Georgia Lawn is offline
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Chelation question

I use a couple different chelated micro products and sometimes I use ferrous sulfate. If I were to mix the chelated product with the ferrous would I get any chelation benefit? Would Adding both products make the original chelated product weaker? Would it be best to add more chelation compound?
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Old 04-01-2014, 11:24 PM
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Georgia Lawn Georgia Lawn is offline
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Anyone have any ideas?
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Old 04-02-2014, 02:21 AM
greendoctor greendoctor is offline
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The chelating agent is normally in exact proportion to the amount of metals being put into solution. There is none extra to chelate more iron sulfate added to a tank mix. I can tell you that a good chelating agent for iron sulfate is food and drug grade citric acid. Costs me $80 for 50 lbs. I add 5 lb for 100 gallons and 4 oz iron sulfate per 1000 sq ft at a 5 gallon per 1000 rate or 80 oz per 100 gallons. The citric acid in that quantity will acidify soil as well, helping the problem causing the need for soluble micronutrients.
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Old 04-02-2014, 08:21 PM
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countryclublawnllc countryclublawnllc is offline
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Citric Acid is a very good chelating agent for both price and effectiveness. One thing to look out for is EDTA based chelating agents. Especially in foliar applied products. It has a more stable charge and not as nutritionally viable, which can tend to make products less available for efficient uptake by the plant.

John
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Old 04-02-2014, 08:35 PM
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Thanks guys exactly what I was looking for
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Old 04-03-2014, 02:30 AM
greendoctor greendoctor is offline
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Quote:
Originally Posted by countryclublawnllc View Post
Citric Acid is a very good chelating agent for both price and effectiveness. One thing to look out for is EDTA based chelating agents. Especially in foliar applied products. It has a more stable charge and not as nutritionally viable, which can tend to make products less available for efficient uptake by the plant.

John
EDTA is also not the best chelating agent for alkaline conditions either. Kind of hard when the whole reason for applying supplemental micronutrients is a problem involving alkaline soils. That mix I described serves me well when treating lawns growing on top of coral. EDTA based chelates do not work the same. I am forced to use 4X rates to get similar results. That starts to get $$$$$$$$$.
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