The long-term effects of antibiotic feeding on dairy cattle are being studied for the third year at the Iowa Agriculutral Experiment Station under the direction of N. L. Jacobson. Forty heifers are divided into two comparable groups and fed similarly, except that the heifers in one group receive aureomycin.
Iowa Farm Science Editorial Board
"Your Experiment Station Reports- Livestock I.,"
Iowa Farm Science: Vol. 9
, Article 4.
Available at: https://lib.dr.iastate.edu/farmscience/vol9/iss5/4