Assume that you own 50,000 acres of land and you grow wheat

No, the statement does not make economic sense.

With 50,000 acres of land and continued applications of fertilizers, you can grow enough wheat to feed many people, but you cannot be able to feed the entire United States. The country's population is high enough to need and consume more wheat than the one grown in the 50,000 acres of land. In a highly-populated area (in this case, the United States), there will be a high demand for products (in this case, wheat) and services in the market. This indicates that the wheat grown may not be enough to feed the entire United States because, due to the high population in the United States, there might be points in time where there are shortages and scarcity.