Tests here at Iowa State and elsewhere show that, with proper management, hay conditioning can result in better quality hay and decrease exposure risks. In good weather, conditioning can cut curing time almost in half.
Casselman, T. W. and Fincham, Robert C.
"How Effective Are Hay Conditioners?,"
Iowa Farm Science: Vol. 15
, Article 2.
Available at: http://lib.dr.iastate.edu/farmscience/vol15/iss5/2