date:Jul 03, 2014
use, greenhouse emissions and energy consumption. He further noted how the efficiency of the US pork industry increased dramatically from 1959 through 2009, realizing a 33 percent improvement in feed efficiency and a doubling of carcass weight production despite a 39 percent decline in the breed herd. Meanwhile, between 1977 and 2007 the US beef industry increased the yield per animal 28 percent, requiring only four animals to produce the same amount of beef as five animals produced 30 years e