There is a different chelating factor in pH target stability and light sensitivity.
Chelated trace elements are more effective because the chelating molecules protect trace elements against insolubility and are also recognised by plant enzymes (that collect micronutrients and transport to tissues). There is a different chelating factor in pH target stability and light sensitivity. Trace element Chelate former pH target
|Type of chelate||Stable at pH|
|Fe EDTA||1 – 6.5|
|Fe DTPA||1 – 7.5|
|Fe EDDHA||4 – 10|
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