Final answer:
There was a significant increase in the American farmer's ability to feed people without changing the amount of land used from 1930 to 2012, due to technological advancements and improved farming methods.
Step-by-step explanation:
Between 1930 and 2012, there was a significant increase in the American farmer's ability to feed people without changing the amount of land used. This was due to several factors, including advancements in agricultural technology and techniques.
During the early 20th century, the Industrial Revolution introduced improved farm equipment and methods that increased productivity. Fewer farm workers were required as a result, leading to a notable rural-to-urban population shift. In the United States in the 1970s, a single farm worker could produce enough food for about 50 people, and by the 2010s, advancements had continued to improve this efficiency.
Economic pressures and technological progress have reduced the number of small farms and farmers. However, the efficiency of food production has increased, allowing a dwindling percentage of farmers to meet the dietary needs of the entire nation and even export food internationally.