Hybrid seed corn supplies appear adequate, but seed of most forage crops for planting in 1963 may be in short supply. Both the new and older crop varieties listed here are backed by years of testing and research.
Thompson, H. E.
"Crop Varieties and Seed Outlook for 1963,"
Iowa Farm Science: Vol. 17
, Article 6.
Available at: https://lib.dr.iastate.edu/farmscience/vol17/iss7/6