Im glad you found this site informative.If your not sure of the material they have Contact Mike you'll find his contact on the site. Tell him 28 referred you,(My company code). He will give you all the details to see if this is what you need.
Have a Great Day!
I am familair with this Company they may have what you need.I have used these products for many uses.There site is
http://www.ECTofGeorgia.com.
It is Custom designed to your Soils,It is Pretty Impresive.Good Luck!