Talk:USDA soil taxonomy

Link to Soil Taxonomy Document is dead
I notice the link to the Soil Taxonomy document listed in the external links and one of the article sources is dead. Is there a better link that can be used to access this information on a site other than Wikipedia? I tried the USDA but I am having trouble finding a page explaining their soil taxonomy system.

ftp://ftp-fc.sc.egov.usda.gov/NSSC/Soil_Taxonomy/tax.pdf

2602:30A:C019:2920:FDE7:B0BE:195C:CB20 (talk) 22:45, 13 August 2015 (UTC)