Hog prices this year reached a seasonal peak at the beginning of July. As expected this peak came well ahead of the early August high of 1957. The reason was a shift to earlier farrowing for the 1958 spring pig crop which shortened the summer period of low hog supply.
Iowa Farm Science: Vol. 13
, Article 8.
Available at: https://lib.dr.iastate.edu/farmscience/vol13/iss3/8