This publication is a revision of an edition prepared by these writers in 1935 and of former editions prepared by T.E. Woodward, Bureau of Dairy Industry, and J.B. McNulty, formerly of the Bureau of Dairy Industry; and George M. Rommel, E.W. Sheets, and F.R. Marshall, formerly of the Bureau of Animal Industry. Of the current edition, T. E. Woodward prepared the sections Silos, Silage crops, and The making of silage, Feeding values of silage, and Silage for dairy cattle. W.H. Black the section Silage for beef cattle, D.A. Spencer the section Silage for sheep, and J.O. Williams the section Silage for horses and mules.