All USDA NASS publication links are broken

[squeek502]

No one seems to care about link rot and it's very frustrating.

Example:

• Previous link (totally dead): http://usda.mannlib.cornell.edu/MannUsda/viewDocumentInfo.do?documentID=1097
• New link (can't even easily link to individual publications anymore): https://usda.library.cornell.edu/concern/publications/r207tp32d