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livingontheland - Re: [Livingontheland] Greensand & other rock dusts

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Subject: Healthy soil and sustainable growing

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  • From: "Tradingpost" <tradingpost@lobo.net>
  • To: livingontheland@lists.ibiblio.org
  • Subject: Re: [Livingontheland] Greensand & other rock dusts
  • Date: Wed, 15 Nov 2006 10:21:34 -0700



We could also ask how can you be sure exactly what's in the soil already.
Or exactly what's in synthetic fertilizers for that matter. Of all the
problem substances we've heard of in food I've yet to hear of a serious
problem with heavy metals in food grown organically.

paul tradingpost@lobo.net

*********** REPLY SEPARATOR ***********

On 11/15/2006 at 6:13 AM Robert Monie wrote:

>A big question for those who advocate using rock powder to mineralize or
>remineralize soil:
>
> How can you be sure exactly what is in the rock dust? Nutritionists
>warn us, for example, not to consume the natural rock deposit Dolomite as
>a mineral supplement, because it frequently contains dangerous quantities
>of lead, along with the valuable calcium and magnesium. How do rock
>dusters know that they are not adding heavy metals to their soil, along
>with the calcium and other useful minerals in the rock? Are there
>scientifically valid assays that can be done on samples of rock dust to
>assure their safety in the garden and on the farm?
>
> Bob Monie
> New Orleans, Zone 8
>







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