permaculture

["Lawrence F. London, Jr." <lfl@intrex.net>]

Lisa Rollens wrote:

> As long as the topic is rock powders, could I ask a question?  Lawrence? 
> Anyone?  The only "rock powder" available around here is limestone, and it 
> is dolomitic.  My soil actually doesn't need much calcium.

You can easily put too much dolomitic lime on your soil resulting in too high 
a pH and too much magnesium.
> What kind of 
> "rock powders" are you referring to???  I thought maybe granite, but there 
> is no granite anywhere around.  I even went to the business that makes grave 
> monuments...mostly granite, but all the work (and hence, dust) is done in 

Rock powder from rock quarries that make crushed rock for road building and 
concrete making.
Other quarries making other products sometimes produce powder suitable for 
food cropping.

> Georgia (USA).  I do have a source and am using some azomite, but that is 
> all that is available.  Thanks for clarification.

Azomite is an excellent source of minerals though it is much more expensive 
per unit volume than quarry rock dust.
From:
http://www.azomite.com/
"AZOMITE® is a naturally mined product that is an excellent anti-caking agent and a unique re-mineralizer for soils. For 
sixty years regional crop and livestock producers from central Utah have used this exceptional material to improve 
livestock and plant growth. Assays reveal that the material contains a broad spectrum of active minerals and trace 
elements."

--
Lawrence F. London, Jr.
Venaura Farm
lfl@intrex.net
info@market-farming.com
IM: lawrence.london@pandion.be & lfl@amber.org.uk
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