The spring pig crop for 1962 was down 2 percent from that of a year earlier. This was a 4-percent change from producers' Dec. 1 intentions - which indicated a 2-percent increase in farrowings.
Skadberg, J. Marvin
Iowa Farm Science: Vol. 17
, Article 10.
Available at: https://lib.dr.iastate.edu/farmscience/vol17/iss3/10