Answer:
30's:
Farming in the 1930s on the Great Plains was perhaps the most difficult occupation in the world. Farmers not only faced a global economic slow down of historic proportions, but they also faced one of the worst and longest droughts in America’s history. People around the world had no money to buy the crops and animals that farmers produced, and the drought made it almost impossible to plant and harvest the crops in the first place. As a result, many farmers lost their farms. Many moved west out of the Great Plains of the United States, looking for any kind of work they could find. Many became migrant farm laborers on the West Coast.
Today:
Today, most farmers use tractors and other motorized equipment to help with field work. Tractors, combines, plows, etc. are much larger and move much faster than horses, so farmers are able to produce more food in a shorter amount of time.