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Re: [APD] Iron Revisted - oxidations states,chelators and availability etc.
>compounds generally insoluble? If this is the case, how would using
>commercial products differ from adding, say rust (!), to the
I've stuck washers, steel wool and nails under my gravel for about a decade
now. No, they can't use rust, but under anaerobic conditions it's
reduced and usable by the plants. Snails and shrimp are unaffected.
If I pull say, Crypt roos out, they're white for 2-3" then all rusty
brown just like in the Dupla book field pictures.
I've seen roots grow around a washer like they were sucking the
juice out ot it.
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