It is a historical fact that the US$ is based on land, and not publicly held land, privately held land. The economy is defined by Gross Domestic Product. The business cycle is based on agriculture, that is as the portion of GDP that is related to agricultural export expands so does the cash in the system of planting, growing, and shipping.
In the late 18th century and early 19th the Unites States Federal Government subdivided and sold land as a means to manage debt. After the civil war the homestead act gave applicants ownership to no cost farm land. These policies are the basis of the federal system we have today. The funding structure is different for the federal government, but the basic economy of the United States in land especially agricultural land with water on it.
Kansas has one of the lowest unemployment rates in the county. One of the reasons for this is wheat. The value of the harvest has been rising steadily even as the number of planted acres has dropped.

Right now even though the government says it supports a strong dollar, a weak dollar is better for exporting revenues especially wheat. Although the entire Kansas spring wheat harvest is not exported, the total Kansas harvest is equal to the total US wheat export.
As the economies of the nations of the world improve they strive to eat better, and they can afford to buy U.S. food.
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