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Coldwater, Michigan | Well Chris,
You first need to find out what form of Zinc each has. The 2 Quarts of Zinc could be EDTA chelate 9%, or 6%. Or it could have some other kind of Zinc product. That would give you some kind of basis for a comparison. Then you need to know what they are using in the 10-34-0 formulation that they are getting to the 4%. Often times the fertilizer manager has no clue whether the Micros will even work in the formulation they are selling. That is why you need to find out what kind they are using.
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Zinc with liquid starter
