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Re: [SANET-MG] Phosphorus availability (was Loss of Minerals)



Here is some info you might enjoy:

Phosphorous in soil - a detailed explanation (Livestock and Poultry
Environmental Stewardship Curriculum):
http://www.lpes.org/Lessons/Lesson34/34_3_Phosphorus_Soil.pdf

Phosphorous binding (New York Water Environment Association):
http://www.nywea.org/clearwaters/321031.html

Phosphorous activating bacteria:
http://www.inventor.hu/Olympic2000/ga1/ga1101e/ga1101e.htm

Heide


Lawrence F. London, Jr. wrote:

Heide Hermary wrote:

Actually, phosphorous (phosphate) exists in the soil as an anion and is
not held at cation exchange sites. However, instead of being leached out
of the soil it forms water-insoluble compounds with other minerals,
depending on pH.  Phosphorous uptake is 500% or so higher from organic
matter than from the mineral soil.
Heide


Great information. Many thanks, Heide. What other minerals does P
combine with
and would amending soil with rock dusts enhance this process thus
making P
more readily available, given high soil organic matter content?

LL
--
L.F.London
lfl@intrex.net
http://market-farming.com
http://www.ibiblio.org/ecolandtech


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