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Re: Oxidation of trace elements

	This came up again.  I went through it before, so I'll be briefer
this time.  

	Element       Oxidation
	copper        no way
        zinc          no way
        boron         no way
        molybdenum    no way
        manganese     highly unlikely
        iron          it's probably already iron III, so no way

Iron, copper, zinc and manganese are usually chelated.  The chelating 
molecule might be oxidised, which could cause loss of iron.  The iron
chelate is usually an iron III chelate, which is accessible to plants,
as far as I know.  The problem with iron III when not chelated is the
fact that it precipitates out.

Paul Sears        Ottawa, Canada