Alfalfa seed supplybelow a year ago. Certified soybean seed supplies 75 percent above last year, while certified oat seed will be 25 percent lower than in 1964.
Thompson, H. E.
"Crop Varieties and Seed Outlook for 1966,"
Iowa Farm Science: Vol. 20
, Article 6.
Available at: https://lib.dr.iastate.edu/farmscience/vol20/iss7/6