Do you buy onions, corn, sugar, grains, fruits, potatoes, beans, mint, or beer in the grocery store?

How else would this country be able to feed so many? The US exports far more agricultural products than it imports, and I think that hoeing 500 acres of onions, picking potato bugs from a 1,000 acres of russets, and then weeding another 1,000 acres of beans would have a tendency to make a farmers back sore.