Article 23298 of rec.gardens:
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From: ajeans@hpl.hp.com (Albert Jeans)
Subject: Rock Dust Fertilizer
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Date: Tue, 5 Oct 1993 14:20:32 GMT
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I just saw a program on PBS about the greenhouse effect and ice ages, and one
of the key ideas was that powdered rock provides essential nutrients for 
plants. They showed many cases of plants grown with and without this rock
dust and the rock dust plants were dramatically more healthy. Has anyone
had any experience with using powdered rock as fertilizer?


Article 23313 of rec.gardens:
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From: dbailey@sr.hp.com (Dave Bailey)
Subject: Re: Rock Dust Fertilizer
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Date: Wed, 6 Oct 1993 15:10:46 GMT
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Albert Jeans (ajeans@hpl.hp.com) wrote:
: I just saw a program on PBS about the greenhouse effect and ice ages, and one
: of the key ideas was that powdered rock provides essential nutrients for 
: plants. They showed many cases of plants grown with and without this rock
: dust and the rock dust plants were dramatically more healthy. Has anyone
: had any experience with using powdered rock as fertilizer?

Did they say how powdered rock becomes ions. A plant can not absorb
elements unless they have a charge.

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