Hay wafers are small packages of hay that can be hauled, stored and fed with the same equipment used for handling corn or other grains. The wafering system permits mechanical handling of hay from field to feedbunk.
Hull, Dale O.
"A Situation Report - Hay Wafers: A New Hay-Making System,"
Iowa Farm Science: Vol. 17
, Article 3.
Available at: https://lib.dr.iastate.edu/farmscience/vol17/iss2/3