By 1967, American corn farm was growing nearly three times as much corn as it had thirty years earlier. The mono-cropped surplus was shared with livestock to increase production, the average dairy cow now produces more than seventy pounds of milk per day, and the top-performing Holsteins produce two hundred pounds per day, a 1,200 percent increase over the 1948 average.
Similarly, a typical potato farmer produced about sixty-three sacks of potatoes for every acre in the 1930s, but by the mid-1960s, it was up to two hundred sacks.
