[Terrapreta] Pottery Shards and Terra Preta

[Greg and April]

May I ask a stupid question?

Has anyone thought to see if there was any comparison between the pottery shards and the clay ( and clay like ) products ( below ) that are already used to encourage plant growth?

http://www.aquabotanic.com/latr.htm  

http://www.seachem.com/products/product_pages/Flourite.html  

http://www.firstrays.com/PrimeAgra/compare.htm 

Greg H.


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