Using improved crop varieties is one of the quickest and most effective ways to step up yields. Here are the crop varieties recommended for 1955. Each is backed by long and painstaking experiments and research.
Johnson, I. J. and Bragonier, W. H.
"Your Recommended Crop Varieties for 1955,"
Iowa Farm Science: Vol. 9
, Article 3.
Available at: https://lib.dr.iastate.edu/farmscience/vol9/iss7/3