Link to the Senate Farm Bill: http://agriculture.senate.gov

The Livestock Title can be found at: X. Livestock Title

Amendments known as En Bloc (meaning the chair and ranking member, along with key committee members agreed that these amendments would be included without a vote) can be found at:
http://agriculture.senate.gov/Amendments/En%20Bloc.pdf - This is also where you will find the language for the ban on packer ownership of cattle.

The Packers and Stockyards Act of 1921 can be found at: http://www.gipsa.usda.gov/GIPSA/documents/GIPSA_Documents/pands_act.pdf

And check out Sen. Grassley on the Farm Bill and packer ban
http://www.brownfieldnetwork.com/gestalt/go.cfm?objectid=41A84B60-F09A-7F7F-B823A50BFF47E604