[Terrapreta] Pee AKA human urine

[Michael Bailes]

*Received: *26 September 1994  *Accepted: *23 January 1995
Abstract  Stored human urine had pH values of 8.9 and was composed of eight
main ionic species (> 0.1 meq L–1), the cations Na, K, NH4, Ca and the
anions, Cl, SO4, PO4 and HCO3. Nitrogen was mainly (> 90%) present as
ammoniacal N, with ammonium bicarbonate being the dominant compound. Urea
and urate decomposed during storage.
 Heavy metal concentrations in urine samples were low compared with other
organic fertilizers, but copper, mercury, nickel and zinc were 10–500 times
higher in urine than in precipitation and surface waters. In a pot
experiment with15N labelled human urine, higher gaseous losses and lower
crop uptake (barley) of urine N than of labelled ammonium nitrate were
found.
 Phosphorus present in urine was utilized at a higher rate than soluble
phosphate, showing that urine P is at least as available to crops as soluble
P fertilizers.

http://www.springerlink.com/content/km386u8967256354/and32P-tracer - plant
nutrients - pot experiment


-- 
Michael the Archangel

"You can fix all the world's problems in a garden. . . .
Most people don't know that"
FROM
http://www.blog.thesietch.org/wp-content/permaculture.swf
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