Ethanol Co-Product Use in U.S. Cattle Feeding: Lessons Learned and Considerations
http://www.ers.usda.gov/Publications/FDS/2009/04Apr/FDS09D01/FDS09D01.pdf
Describes how byproducts of making ethanol have become more valued in the livestock-feed market but warns about limitations which affect how they are handled, stored, and used. From the Economic Research Service
