permaculture

[John Irwin <jwirwin@permaculture.net>]

HI Rick -

SAY that again?  Lots of lead in newspapers?

Is there any lead in cardboard?

Is this a new or am I just out of the loop?

If leaded (newspaper sheet mulched) soil isn't used
for growing produce, if there
still a threat to human health?

Always Learning...

John

Rick Valley wrote:

> I've had a criticism of sheet mulching, to whit, newspaper is full of lead
> but you can get the lead out of the soil by growing cover crops and sending
> them to the landfill. Lone Rass! sez I, but does anyone out there in
> cyberland know of ANY plants that can take up lead for transport elsewhere,
> and how long does it take to say, deal with 800 ppm lead?
> Urban folk legends! Ay caramba!
> I say, dig it up and transport it to a sacrifice zone.
> >From everything I've seen lead in urban soils comes from #1, paint #2, 
> >other
> human fabricated sources transported & concentrated- old burn piles, etc. A
> paper I got from Inst. for Urban Hort. up in Seattle at the U of WA found
> that "soil lead content did not correlate with proximity to roads, but with
> length and intensity of human use of a site"
>
> -Rick
>
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