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<DIV>In a message dated 10/21/2012 11:02:52 A.M. Eastern Daylight Time,
lhelferty@sympatico.ca writes:</DIV>
<BLOCKQUOTE
style="BORDER-LEFT: blue 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><FONT
style="BACKGROUND-COLOR: transparent" color=#000000 size=2
face=Arial> (My most recent conversations I am having had to do with the
complimentary use of "rock dust" ~ a.k.a. "agrominerals" and Biochar ... The
use of 'agrominerals' is a technique that [unknown to me until recently] has
actually been honed by many folks at the <I>University of Guelph</I> over the
past several decades. With Biochar one should be able to create high
quality inoculated bio-chars that help to "free" the agrominerals [rock dust]
of their 'nutrients' at a more accelerated rate.)<BR></FONT></BLOCKQUOTE></DIV>
<DIV></DIV>
<DIV>DD I have always wondered why limestone and other sedimentary rocks are
often thought of as pure calcium and magnesium carbonate for example.
What happened to all the other beneficial plant nutrient that was in those
decomposing shell creatures that formed the rock? Any sedimentary rock formed
since the evolution of primitive life forms surely has lots of micronutrients
and even possibly potassium salts dissolved within. All of these are fertilizers
of sorts, enabling the stabilization of nitrogen from the air in the presents of
proper soil microbes. </DIV>
<DIV> Lately, I've been taking in a lot of info on the
formation of gas and oil deposits. Studying the evidence, it becomes obvious
that these fossil fuels and even coal can form in any sedimentary rock layer
that contained life forms. Only a persisting cover trap is necessary to hold the
hydrocarbons in. The same must be true for plant micronutrients, most of which
are even easier to hold in the strata than hydrocarbon.</DIV>
<DIV> Lastly, igneous rocks usually have a wide variety
of minerals also contained within. The fact that most volcanic soils are
very rich for plant growth shows that is true. Only the metamorphic rocks
have tended to degrade to lowest terms, often but not always releasing the
beneficial minerals over time. </DIV>
<DIV> In conclusion, anything which encourages the
fracturing and weathering of rock will probably help plant life. Providing
carbon type structures to enable beneficial soil microbes to thrive then
accelerates these weathering processes as the acids produced such as carbonic
acid break down the rock. This explains the main benefit of biochar. The
saturated potassium and phosphorous salts in ash in the char also give a short
term boost to the soil. </DIV>
<DIV> </DIV>
<DIV> Dan Dimiduk </DIV></FONT></BODY></HTML>