http://imgs.tootoo.com/f5/77/f577b58151 ... 10426e.jpg
They-Get Their Nitrogen Primary as FERRICYANIDE Leached from The-Charcoal in-The Sandy-Soil. This-Is 'Why' COAL Just Doesn't Substitute for-It (It also Has too-Much Sulphur In-It). 'How'-it-Is Naturally Leached in-These Coastal-Plain Soils is-Worthy of an International-Conference.
http://www.lookchem.com/300w/2010/075/15320-55-5.jpg
It's-R Molecule Packed-with ENERGY as-Well-as Nitrogen ... so-it's Very 'Economical' from-an Ecological Point-of-View. it's-also R-'Soluble' Carbon-Resource (Once-Leached) in-R Very-Sandy Enironment with Little-(Sparse)-Other Organic-Matter:
http://www.duke.edu/~jspippen/plants/di ... enderz.jpg
It's Relatively Non-toxic Due-to- The-Nature-of-IRON ... one-of-Few Handful-or-So Elements of The Periodic-Table that-Can Natural 'Fix'-Nitrogen from the-Atmosphere without the-Aid of-R-Catalyst [in-Fact Elemental-IRON it-Is Actually Used as a Catalyst In The-Haber-Process ... but it-Is of-Course THEN 'Red'-Hot & under Extreme-Pressure 200-300 Pounds-per-Square-Inch]. Thus The-Iron is soo-'Tightly'-Bound to The Cyanide-Portion of The-Molecule that It-Is Virtually 'Harmless' ... though one 'should' Alway urge-caution with Any-Chemical or Compound, so-to-Speak!!! >(*~*)< / >(*U^)<
Commercial-Places Started Using-it IN The-Nineties with-The 'Cover'-Story of: "TANNIC-Teas" (About the-Time Most Mexican-Pings Went Magenta) ... but When People Tried-Using Coffee Tea-Bags &-The-Like They-Changed Their-'Story' to: "SEAWEED-Extract".
It's Relatively-CHEAP &-Available from-Most Photographic-Stores!!! >(*U^)<