GRAZING of domesticated animals on native forage plants is probably one of the oldest activities of civilized man. Since long before the dawn of history domesticated animals have been grazed under more or less close herding on plants that grew naturally without man's care. The nomadic tribes as well as the settled peoples throughout history have kept livestock, most of which received their feed from native plants.
"GRAZING IN THE UNITED STATES,"
Ames Forester: Vol. 40
, Article 5.
Available at: https://lib.dr.iastate.edu/amesforester/vol40/iss1/5