Answer:
The Northern free states also were proved to produce more crops than the South, even with the North having considerably smaller labor force than the South's slave industry. ... The North's increased crops is most likely due to the recent invention of many farming machines that the South did invent and utilize.
The Louisiana Purchase of 1803 doubled the size of the United States, gave the country complete control of the port of New Orleans, and provided territory for westward expansion.
About 25% of Americans were out of work.