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A food-feed system is an integrated livestock-crop production system where crops grown on farms are harvested for human consumption and the crop-residues or by-products are used as feed for livestock.
This is because feeding grain to cattle makes their normally pH-neutral digestive tract abnormally acidic; over time, the pathogenic E. coli becomes acid resistant. [40] If humans ingest this acid-resistant E. coli via grain-feed beef, a large number of them may survive past the stomach, causing an infection. [41]
Smithfield Foods hog CAFO, Unionville, Missouri, 2013. In animal husbandry, a concentrated animal feeding operation (CAFO), as defined by the United States Department of Agriculture (USDA), is an intensive animal feeding operation (AFO) in which over 1,000 animal units are confined for over 45 days a year.
Because the Southwest United States is so dry and hot and the soil is inadequate compared to places like the Great Plains in the Midwest, much of the Southwest is used for grazing livestock. In fact, almost 60 percent of the land in Nevada is used for livestock grazing, and at least 35 percent in New Mexico and Arizona.
Livestock production systems can be defined based on feed source, as grassland-based, mixed, and landless. [149] As of 2010, 30% of Earth's ice- and water-free area was used for producing livestock, with the sector employing approximately 1.3 billion people. Between the 1960s and the 2000s, there was a significant increase in livestock ...
As bird flu cases crop up across the country, here's what a food safety expert wants you to know about getting the virus from eggs, poultry, and dairy products.