Excellent quality hay may be made with the windrow pick-up baler.
A windrow pick-up baler, operated at Iowa State College during the haymaking season of 1933, showed an average capacity of 1.59 tons of alfalfa per hour and a labor requirement of 2.52 man hours per ton. After the operators had developed some skill, the capacity of the machine in baling one crop from a field was increased to 3 tons per hour, and the labor expenditure lowered to 1.35 man hours per ton.
Davidson, J. Brownlee and Carter, William H.
"Harvesting alfalfa with a windrow pick-up baler,"
Bulletin: Vol. 28
, Article 1.
Available at: https://lib.dr.iastate.edu/bulletin/vol28/iss322/1