The extent to which contract hog farming and specialized multiple farrowing hog systems are adopted in the state may depend very much on how they fit into the operations and plans of individual Iowa farm operators.
Gibbons, James M. and Heady, Earl O.
"More About Choosing a Hog System,"
Iowa Farm Science: Vol. 14
, Article 5.
Available at: http://lib.dr.iastate.edu/farmscience/vol14/iss8/5