WordNet sense 1 (the federal department that administers programs that provide services to farmers (including research and soil conservation and efforts to stabilize the farming economy); created in 1862):

USDA, Department of Agriculture, Agriculture Department

WordNet sense 2 (a large-scale farming enterprise):

agribusiness, factory farm

WordNet sense 3 (the practice of cultivating the land or raising stock):

farming, husbandry