Choosing the right variety of farm crops is one of the essential steps to get maximum crop yields. The results of research in crop breeding and management none make it possible for farmers to remove many of the hazards in crop production.
Johnson, I. J.
"Varieties and Cropping Practices for 1951,"
Iowa Farm Science: Vol. 5
, Article 2.
Available at: https://lib.dr.iastate.edu/farmscience/vol5/iss9/2