Federally inspected hog slaughter for the first half of 1963 was 5 percent greater than a year earlier. The April slaughter was 12 percent above last year's level. These hogs came from last fall's pig crop of 44.5 million head -- 4.6 percent larger than the 1961 fall crop.
Uhrig, J. W.
Iowa Farm Science: Vol. 18
, Article 9.
Available at: https://lib.dr.iastate.edu/farmscience/vol18/iss5/9